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SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, DC 20549



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FORM 20-F



(Mark
One)



| ̈ | Registration statement pursuant to Section 12(b) or 12(g) of the Securities Exchange Act of 1934
|- | ------------------------------------------------------------------------------------------------



or



|x | Annual report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 for the fiscal year ended December 31, 2005
|- | --------------------------------------------------------------------------------------------------------------------------------



or



| ̈ | Transition report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934
|- | ----------------------------------------------------------------------------------------



For the transition period from
 to



Commission file number 333-10486



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TREND MICRO KABUSHIKI KAISHA

(Exact Name of Registrant as Specified in Its Charter)



TREND MICRO INCORPORATED

(Translation of Registrants Name Into English)



JAPAN

(Jurisdiction of Incorporation or Organization)



Shinjuku MAYNDS Tower, 1-1, Yoyogi 2-chome, Shibuya-ku, Tokyo

151-0053, Japan

(Address of Principal Executive Offices)



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Securities registered or to be registered pursuant to Section 12(b) of the Act:



|                    |  |                                          
|------------------- |  | -----------------------------------------
|Title of Each Class |  | Name of Each Exchange on Which Registered
|None                |  | None                                     



Securities
registered or to be registered pursuant to Section 12(g) of the Act:



(1) Common Stock*

(Title of Class)



Securities for which there is a reporting obligation pursuant to
Section 15(d) of the Act:



None

(Title of Class)



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Indicate the number of outstanding shares of each of the
issuers classes of capital or common stock as of the close of the period covered by the annual report.



Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act.



Yes  x    No ̈



If this report is an annual or transition report, indicate by check mark if the registrant is not required to file reports
pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934.



Yes  x    No ̈



Note  Checking the box above will not relieve any registrant required
to file reports pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 from their obligations under those Sections.



As of December 31, 2005, 134,090,494 shares of common stock were outstanding, including 1,565,200 American Depositary Shares represented by 1,565,200
shares of common stock.



Indicate by check mark whether the
registrant: (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and
(2) has been subject to such filing requirements for the past 90 days.



Yes  x    No ̈



Indicate by check mark whether the registrant is a large accelerated filer,
an accelerated filer, or a non-accelerated filer. See definition of accelerated filer and large accelerated filer in Rule 12b-2 of the Exchange Act. (Check one):



Large accelerated filer  x                Accelerated filer ̈Non-accelerated filer ̈



Indicate by check mark which
financial statement item the registrant has elected to follow.



Item 17 ̈Item 18  x



All information contained in this report is as of December 31, 2005 or
for the year ended December 31, 2005 unless the context otherwise indicates. In tables appearing in this annual report, figures may not add up to totals due to rounding.



* Not for trading, but only in connection with the registration of American Depositary Shares, each of which represents one
share of Common Stock.



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Cautionary Statement Regarding Forward-Looking Statements



This annual report on Form 20-F contains forward-looking
statements within the meaning of the Section 21E of the Securities Exchange Act of 1934. To the extent that statements in this annual report do not relate strictly to historical or current facts, they may constitute forward-looking
statements. These forward-looking statements are based upon managements current assumptions and beliefs in light of the information currently available to it, but involve known and unknown risks and uncertainties. Our actual actions or results
may differ materially from those discussed in the forward-looking statements. We undertake no obligation to publicly update any forward-looking statement after the date of this annual report, but investors are advised to consult any further
disclosures by us in our subsequent filings pursuant to the Securities Exchange Act of 1934.



Important risks and factors that could cause our actual results to differ materially from our expectations are generally set forth in Item 3.D of this annual report and include, without limitation:



| |  | difficulties in addressing new virus and other computer security problems;
|- |  | --------------------------------------------------------------------------



| |  | timing of new product introductions and lack of market acceptance for our new products;
|- |  | ---------------------------------------------------------------------------------------



| |  | the level of continuing demand for, and timing of sales of, our existing products;
|- |  | ----------------------------------------------------------------------------------



| |  | rapid technological change within the anti-virus software industry;
|- |  | -------------------------------------------------------------------



| |  | changes in customer needs for anti-virus software;
|- |  | --------------------------------------------------



| |  | existing products and new product introductions by our competitors and the pricing of these products;
|- |  | -----------------------------------------------------------------------------------------------------



| |  | declining prices for our products and services;
|- |  | -----------------------------------------------



| |  | the effect of future acquisitions on our financial condition and results of operations;
|- |  | ---------------------------------------------------------------------------------------



| |  | the effect of adverse economic trends on our principal markets;
|- |  | ---------------------------------------------------------------



| |  | the effect of foreign exchange fluctuations on our results of operations;
|- |  | -------------------------------------------------------------------------



| |  | an increase in the incidence of product returns;
|- |  | ------------------------------------------------



| |  | the potential lack of attractive investment targets;
|- |  | ----------------------------------------------------



| |  | difficulties in successfully executing our investment strategy; and
|- |  | -------------------------------------------------------------------



| |  | other risks discussed under Risk Factors and elsewhere in this annual report.
|- |  | -------------------------------------------------------------------------------



As used in this annual report, unless otherwise specified, references to Trend Micro are to Trend Micro Incorporated. Also, as
used in this annual report, references to we, our and us are to Trend Micro Incorporated and, except as the context otherwise requires, its consolidated subsidiaries.



Also, as used in this annual report:



| |  | dollar or $ means the lawful currency of the United States of America, and yen or (Yen) means the lawful currency of Japan.
|- |  | -----------------------------------------------------------------------------------------------------------------------------------



| |  | U.S. GAAP means generally accepted accounting principles in the United States.
|- |  | --------------------------------------------------------------------------------



| |  | ADS means an America Depositary Share, each representing 1 share of our common stock, and ADR means an American Depositary Receipt evidencing ADSs.
|- |  | -------------------------------------------------------------------------------------------------------------------------------------------------------



| |  | fiscal 2005 and fiscal year 2005 refer to our fiscal year ended December 31, 2005, and other fiscal years are referred to in a corresponding manner.
|- |  | --------------------------------------------------------------------------------------------------------------------------------------------------------



| |  | In tables appearing in this annual report, figures may not add up to totals due to rounding.
|- |  | --------------------------------------------------------------------------------------------



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Item 1. Identify of Directors, Senior Management and Advisers.



Not applicable



Item 2. Offer Statistics and Expected Timetable.



Not applicable



Item 3. Key Information.



A. Selected Financial Data.



The selected financial data for the years ending December 31, 2003, 2004 and 2005, and as of December 31, 2004 and 2005 is derived from the Companys
audited consolidated financial statements, which are included elsewhere in this Annual Report on Form 20-F. The historical statement of income information audited financial statements for the years ended December 31, 2001, 2002, 2003 and 2004 have
been restated and the financial data presented below reflects the restatement as discussed in Note 2(1), Restatements to the consolidated financial statements. The historical restated consolidated following financial data for the years
ended December 31, 2002 and 2001 has been derived from the consolidated unaudited financial statements not included herein and includes the effects of the restatement items discussed in Note 2, Restatements of the Notes to the
Consolidated Financial Statements. Selected financial data should also be read in conjunction with Operating and Financial Review and Prospects included as Item 5 and the Consolidated Financial Statements and the related notes thereto
which begin on page F-2 and are in response to Item 8 and Item 18.



|                                                                                        |  |                                                                      |        |            |       |            |  |            |        |      |       |        |  |       |        |  |   |         |  
|--------------------------------------------------------------------------------------- |  | -------------------------------------------------------------------- | ------ | ---------- | ----- | ---------- |  | ---------- | ------ | ---- | ----- | ------ |  | ----- | ------ |  | - | ------- | -
|                                                                                        |  | Year Ended December 31,                                              |       
|                                                                                        |  | 2001                                                                 |        | 2002       |       | 2003       |  | 2004       |        | 2005 |       | 2005   | 
|                                                                                        |  | (restated)                                                           |        | (restated) |       | (restated) |  | (restated) |        |      |       |        | 
|                                                                                        |  | (in millions of yen and thousands of dollars, except per share data) |       
|Net Sales                                                                               |  | (Yen)                                                                | 31,326 |            | (Yen) | 42,980     |  | (Yen)      | 48,088 |      | (Yen) | 62,049 |  | (Yen) | 73,030 |  | $ | 618,897 |  
|Cost of sales: (1)                                                                      |  |                                                                      |        |            |       |            |  |            |        |      |       |        |  |       |        |  |   |         |  
|Amortization of capitalized software, and Materials                                     |  |                                                                      | 1,899  |            |       | 2,354      |  |            | 3,168  |      |       | 3,236  |  |       | 2,599  |  |   | 22,022  |  
|Maintenance                                                                             |  |                                                                      | 854    |            |       | 1,806      |  |            | 2,194  |      |       | 2,261  |  |       | 1,671  |  |   | 14,163  |  
|Customer Support                                                                        |  |                                                                      | 2,449  |            |       | 3,858      |  |            | 4,831  |      |       | 5,724  |  |       | 6,858  |  |   | 58,118  |  
|                                                                                        |  |                                                                      |        |            |       |            |  |            |        |      |       |        |  |       |        |  |   |         |  
|Total Cost of sales                                                                     |  |                                                                      | 5,202  |            |       | 8,018      |  |            | 10,193 |      |       | 11,221 |  |       | 11,128 |  |   | 94,303  |  
|                                                                                        |  |                                                                      |        |            |       |            |  |            |        |      |       |        |  |       |        |  |   |         |  
|Operating expenses:(1)                                                                  |  |                                                                      |        |            |       |            |  |            |        |      |       |        |  |       |        |  |   |         |  
|Selling                                                                                 |  |                                                                      | 10,001 |            |       | 15,052     |  |            | 15,360 |      |       | 16,009 |  |       | 20,944 |  |   | 177,496 |  
|Research and development                                                                |  |                                                                      | 1,901  |            |       | 1,700      |  |            | 1,725  |      |       | 2,597  |  |       | 4,395  |  |   | 37,247  |  
|General and administrative                                                              |  |                                                                      | 4,453  |            |       | 4,344      |  |            | 5,656  |      |       | 6,144  |  |       | 8,991  |  |   | 76,192  |  
|Goodwill write-off                                                                      |  |                                                                      | 2,253  |            |       |           |  |            |       |      |       |       |  |       |       |  |   |        |  
|                                                                                        |  |                                                                      |        |            |       |            |  |            |        |      |       |        |  |       |        |  |   |         |  
|Total operating expenses                                                                |  |                                                                      | 18,608 |            |       | 21,096     |  |            | 22,741 |      |       | 24,750 |  |       | 34,330 |  |   | 290,935 |  
|                                                                                        |  |                                                                      |        |            |       |            |  |            |        |      |       |        |  |       |        |  |   |         |  
|Operating income                                                                        |  |                                                                      | 7,516  |            |       | 13,866     |  |            | 15,154 |      |       | 26,078 |  |       | 27,572 |  |   | 233,659 |  
|Other income (expense), net                                                             |  |                                                                      | 241    |            |       | (768)      |  |            | 175    |      |       | 247    |  |       | 1,536  |  |   | 13,022  |  
|Net income before tax                                                                   |  |                                                                      | 7,757  |            |       | 13,098     |  |            | 15,329 |      |       | 26,325 |  |       | 29,108 |  |   | 246,681 |  
|Income taxes                                                                            |  |                                                                      | 3,241  |            |       | 5,395      |  |            | 6,103  |      |       | 10,503 |  |       | 10,504 |  |   | 89,022  |  
|Income before minority interest and equity in earnings (losses) of affiliated companies |  |                                                                      | 4,516  |            |       | 7,703      |  |            | 9,226  |      |       | 15,822 |  |       | 18,604 |  |   | 157,659 |  
|Minority interest in income of consolidated subsidiaries                                |  |                                                                      |       |            |       |           |  |            |       |      |       |       |  |       | (0)    |  |   | (3      | )
|Income from consolidated companies                                                      |  |                                                                      | 4,516  |            |       | 7,703      |  |            | 9,226  |      |       | 15,822 |  |       | 18,604 |  |   | 157,656 |  
|Equity in earnings (losses) of affiliated companies                                     |  |                                                                      | (130)  |            |       | 11         |  |            | 24     |      |       | 53     |  |       | 66     |  |   | 564     |  
|Net income                                                                              |  | (Yen)                                                                | 4,386  |            | (Yen) | 7,714      |  | (Yen)      | 9,250  |      | (Yen) | 15,875 |  | (Yen) | 18,670 |  | $ | 158,220 |  
|                                                                                        |  |                                                                      |        |            |       |            |  |            |        |      |       |        |  |       |        |  |   |         |  
|Net income per share (basic)(2)                                                         |  | (Yen)                                                                | 33.33  |            | (Yen) | 58.39      |  | (Yen)      | 70.11  |      | (Yen) | 120.64 |  | (Yen) | 139.85 |  | $ | 1.19    |  
|                                                                                        |  |                                                                      |        |            |       |            |  |            |        |      |       |        |  |       |        |  |   |         |  



- 1 -



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|                                                        |  |                                                                      |             |      |       |             |  |       |             |      |       |             |  |       |             |  |   |     
|------------------------------------------------------- |  | -------------------------------------------------------------------- | ----------- | ---- | ----- | ----------- |  | ----- | ----------- | ---- | ----- | ----------- |  | ----- | ----------- |  | - | ----
|                                                        |  | Year Ended December 31,                                             
|                                                        |  | 2001                                                                 |             | 2002 |       | 2003        |  | 2004  |             | 2005 |       | 2005       
|                                                        |  | (in millions of yen and thousands of dollars, except per share data)
|Net income per share (diluted)(2)                       |  | (Yen)                                                                | 33.02       |      | (Yen) | 58.22       |  | (Yen) | 69.95       |      | (Yen) | 118.59      |  | (Yen) | 137.83      |  | $ | 1.17
|                                                        |  |                                                                      |             |      |       |             |  |       |             |      |       |             |  |       |             |  |   |     
|Cash dividends per share(2)                             |  | (Yen)                                                                |            |      | (Yen) |            |  | (Yen) |            |      | (Yen) | 14          |  | (Yen) | 36          |  | $ | 0.31
|                                                        |  |                                                                      |             |      |       |             |  |       |             |      |       |             |  |       |             |  |   |     
|Weighted average common shares outstanding (basic)(2)   |  |                                                                      | 131,594,913 |      |       | 132,111,467 |  |       | 131,940,179 |      |       | 131,588,738 |  |       | 133,498,438 |  |   |     
|Weighted average common shares outstanding (diluted)(2) |  |                                                                      | 132,832,159 |      |       | 132,494,201 |  |       | 132,235,128 |      |       | 133,863,237 |  |       | 135,456,212 |  |   |     





|(1) | The Company has historically disclosed maintenance costs as part of the Research and development and maintenance line item within operating expenses in the consolidated
statement of income. Starting fiscal year 2005, maintenance costs are included in cost of sales, therefore, prior years figures have been restated to reflect such amendment. In addition, customer support expenses, which were disclosed as a
component of operating expenses, through December 31, 2004, have also been included in cost of sales starting fiscal year ended 2005, therefore, prior years figures have been restated to reflect such amendment. Refer to Note 2 to the
consolidated financial statements, included elsewhere in this Annual Report for additional information.
|--- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------





|(2) | We effected a one-to-two stock split on May 18, 2001. The share and per share amounts for each of the year ended December 31, 2001 have been restated to reflect that stock
split.
|--- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



|                                       |  |                                                                      |        |      |       |        |  |       |        |      |       |         |  |       |         |  |   |          
|-------------------------------------- |  | -------------------------------------------------------------------- | ------ | ---- | ----- | ------ |  | ----- | ------ | ---- | ----- | ------- |  | ----- | ------- |  | - | ---------
|                                       |  | Year Ended December 31,                                             
|                                       |  | 2001                                                                 |        | 2002 |       | 2003   |  | 2004  |        | 2005 |       | 2005   
|                                       |  | (in millions of yen and thousands of dollars, except per share data)
|Consolidated Balance Sheet Information |  |                                                                      |        |      |       |        |  |       |        |      |       |         |  |       |         |  |   |          
|Cash and cash equivalents              |  | (Yen)                                                                | 40,783 |      | (Yen) | 47,830 |  | (Yen) | 46,719 |      | (Yen) | 52,908  |  | (Yen) | 59,613  |  | $ | 505,191  
|Total assets                           |  |                                                                      | 64,729 |      |       | 73,838 |  |       | 81,271 |      |       | 106,734 |  |       | 132,935 |  |   | 1,126,570
|Current portion of long-term debt      |  |                                                                      | 3,000  |      |       | 5,000  |  |       | 6,500  |      |       |        |  |       |        |  |   |         
|Long-term debt                         |  |                                                                      | 11,500 |      |       | 6,500  |  |       |       |      |       |        |  |       |        |  |   |         
|Total liabilities                      |  |                                                                      | 33,963 |      |       | 36,694 |  |       | 37,319 |      |       | 43,559  |  |       | 51,068  |  |   | 432,776  
|Common stock                           |  |                                                                      | 6,834  |      |       | 7,257  |  |       | 7,396  |      |       | 11,427  |  |       | 12,485  |  |   | 105,804  
|Shareholders equity                   |  | (Yen)                                                                | 30,766 |      | (Yen) | 37,144 |  | (Yen) | 43,952 |      | (Yen) | 63,175  |  | (Yen) | 81,863  |  | $ | 693,755  



Exchange Rates.



In this annual report, we have translated Japanese yen
amounts into U.S. dollars solely for the convenience of readers. Unless otherwise indicated, the rate we used for the translation was (Yen) 118. 00 per $1, which was the approximate rate on December 31, 2005. The following table shows the noon
buying rates for Japanese yen expressed in Japanese yen per $1. On June 15, 2006 the noon buying rate announced by the Federal Reserve Bank of New York was (Yen) 115.06 per $1.



- 2 -



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|                               |  |        |  |        |  |             |  |            
|------------------------------ |  | ------ |  | ------ |  | ----------- |  | -----------
|Year ended/ending December 31, |  | High   |  | Low    |  | Average (1) |  | Period- end
|2001                           |  | 131.47 |  | 114.26 |  | 122.18      |  | 131.04     
|                               |  |        |  |       
|2002                           |  | 134.77 |  | 115.71 |  | 124.81      |  | 118.75     
|                               |  |        |  |       
|2003                           |  | 121.42 |  | 106.93 |  | 115.99      |  | 107.13     
|                               |  |        |  |       
|2004                           |  | 114.30 |  | 102.56 |  | 108.15      |  | 102.68     
|                               |  |        |  |       
|2005                           |  | 120.93 |  | 102.26 |  | 110.74      |  | 117.88     
|                               |  |        |  |       
|2006 (through June 15)         |  | 119.07 |  | 110.07 |  | 115.61      |  | 115.06     
|                               |  |        |  |       
|Calendar Year 2005             |  |        |  |        |  |             |  |            
|                               |  |        |  |       
|December                       |  | 120.93 |  | 115.78 |  | 118.46      |  | 117.88     
|                               |  |        |  |       
|Calendar Year 2006             |  |        |  |        |  |             |  |            
|                               |  |        |  |       
|January                        |  | 117.55 |  | 113.96 |  | 115.48      |  | 116.88     
|                               |  |        |  |       
|February                       |  | 118.95 |  | 115.82 |  | 117.86      |  | 115.82     
|                               |  |        |  |       
|March                          |  | 119.07 |  | 115.89 |  | 117.28      |  | 117.48     
|                               |  |        |  |       
|April                          |  | 118.66 |  | 113.79 |  | 117.07      |  | 113.79     
|                               |  |        |  |       
|May                            |  | 113.46 |  | 110.07 |  | 111.73      |  | 112.26     
|                               |  |        |  |       
|June (until June 15)           |  | 115.06 |  | 111.66 |  | 113.60      |  | 115.06     

---

|(1) | For annual averages, calculated based on the average of the exchange rates on the last day of each month during the period. For monthly averages, calculated based on the average of
noon buying rates.
|--- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



B. Capitalization and Indebtedness.



Not applicable



C. Reasons for the Offer and Use of Proceeds.



Not applicable



D. Risk Factors.



The occurrence of any of the following risks could hurt our business, financial condition or results of operations. In such case, the trading price of our
shares and the ADSs could decline and you could lose all or part of your investment. Other risks and uncertainties not now known to us or that we think are immaterial may also impair our business.



MAJOR SOFTWARE AND HARDWARE VENDORS MAY INCORPORATE ANTI-VIRUS PROTECTION IN THEIR PRODUCT
OFFERINGS, WHICH COULD RENDER OUR PRODUCTS OBSOLETE OR UNMARKETABLE.



Major vendors of operating system software and other software such as firewall or e-mail software or computer hardware may decide to enhance or bundle their products with their other products to include anti-virus
functions. These companies may offer anti-virus protection as a standard feature in their products, at minimal or no additional cost to customers. This could render our products obsolete or unmarketable, particularly if anti-virus products offered
by these vendors were comparable or superior to our products. In addition, even if these vendors anti-virus products offered fewer functions than our products, or were less effective in detecting and cleaning virus-infected files, customers
could still choose them over our products due to lower cost or for any other reasons.



Microsoft Corp., a major operating system vendor, has acquired some security vendors such as GeCAD Software Srl., an anti-virus software vendor in Romania. Microsoft Corp. announced that they would provide anti-virus
products or services such as named Windows OneCare or Client Protection in 2006. At this time, we do not know the details of those services or products, but if in fact Microsoft launches those products or services,
and/or, if anti-virus functions were to be included in its operating system products, this could have a material adverse effect on our business, financial condition and results of operations.



- 3 -



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BECAUSE WE GENERATE SUBSTANTIALLY ALL OF OUR SALES FROM A SINGLE PRODUCT LINE, WE ARE VULNERABLE TO DECREASED DEMAND
FOR SUCH PRODUCTS.



Unlike software companies with
diversified product lines, we derive substantially all of our net sales from licensing and selling anti-virus software products. Although we have begun to offer more comprehensive network and internet security and management software and services,
we expect anti-virus products to continue to account for the largest portion of our net sales for the foreseeable future. If the demand for, or the prices of, anti-virus products drop as a result of competition, technological changes or other
factors such as lower growth or a contraction in the worldwide anti-virus software market, this could have a material adverse effect on our business, financial condition and results of operations.



DETERIORATION IN OUR RELATIONSHIP WITH SOFTBANK BB CORP. COULD RESULT IN A DECREASE IN
SALES OF OUR PRODUCTS.



We depend on our relationship with
SOFTBANK BB (formerly SOFTBANK COMMERCE CORP.), which has played an instrumental role in the development of our business in Japan. SOFTBANK BB also has close relationships with many resellers and systems integrators through which we sell our
anti-virus software to corporate end users in Japan. An adverse change in our relationship with SOFTBANK BB would result in decreased sales to SOFTBANK BB and could disrupt our relationship with many resellers of our products. This could make it
difficult for us to market our products in Japan. Sales to SOFTBANK BB totaled approximately (Yen)9.2 billion, or 19.1%, of our net sales in fiscal 2003, approximately (Yen)10.4 billion, or 16.8%, of our net sales in fiscal 2004 and approximately
(Yen)10.6 billion, or 14.5%, of our net sales in fiscal 2005. Because of our dependence on SOFTBANK BB, the price of shares and ADSs could fall as a result of adverse events affecting SOFTBANK BB, even if the events do not relate directly to us.



OUR PRODUCTS MAY BECOME OBSOLETE BECAUSE RAPID TECHNOLOGICAL CHANGE
REGULARLY OCCURS IN THE ANTI-VIRUS SOFTWARE MARKET.



The
anti-virus software market is characterized by:



| |  | rapid technological change;
|- |  | ---------------------------



| |  | the proliferation of new and changing computer viruses;
|- |  | -------------------------------------------------------



| |  | frequent product introductions and updates; and
|- |  | -----------------------------------------------



| |  | changing customer needs.
|- |  | ------------------------



These characteristics of our market create significant risks and uncertainties for our business success. For example, our competitors might introduce
anti-virus products that are technologically superior to our products. Additionally, new software operating system, network system or anti-virus software industry standards could emerge. Emerging trends in these systems and standards currently
include applications distributed over the Internet and the use of a Web browser to access client-server systems. Our existing products might be incompatible with some or all of such standards. Our business, financial condition and results of
operations could materially suffer unless we are able to respond quickly and effectively to these developments.



OUR HARDWARE-BASED PRODUCTS FACE MANUFACTURING AND INVENTORY RISKS.



We rely on a small number of third parties to manufacture some of our hardware-based products, such as the Trend Micro Network VirusWall described in
Item 4.B. We expect our reliance on third-party manufacturers to become more important as the number of our hardware-based products increases. Reliance on third-party manufacturers involves a number of risks, including a lack of control over
the manufacturing process and the potential absence or unavailability of adequate capacity. If any of our third-party manufacturers cannot or will not manufacture our products in required volumes in compliance with environmental and other
regulations in the markets we serve, on a cost-effective basis, in a timely manner, or at all, we will have to secure additional manufacturing capacity. The unexpected loss of any of our manufacturers could disrupt our business. Furthermore, our
hardware-based products contain critical components supplied by a single or a limited number of third parties. Any significant shortage of components or the failure of the third-party supplier to maintain or enhance these products could lead to
cancellation of customer orders or delays in the placement of orders and adversely affect our financial condition and results of operation.



- 4 -



---

WE MAY NOT GENERATE EXPECTED RESULTS IN STRATEGIC ALLIANCES



Because we are mainly focusing our business on the field of anti-virus
software and do not offer other security products such as firewalls, we actively pursue strategic alliances with other companies that allow us to provide customers with integrated or other new products and services derived from the alliances. In
fiscal year 2004, we began to provide a third party URL filtering solution and have signed contracts with Cisco Systems to integrate network worm and virus outbreak prevention services with Ciscos products and services. To launch and provide
such products and services, we may invest substantial cash and other resources in product developments, marketing promotions and support and maintenance activities. However we may not earn revenue successfully from alliances despite our efforts, and
such alliance may be terminated or dissolved by various causes before generating revenue.



WE MAY NOT BE ABLE TO INCREASE OUR MARKET SHARE IN THE U.S. AND EUROPEAN MARKETS BECAUSE OUR COMPETITORS ARE MORE ESTABLISHED THAN WE ARE IN THESE MARKETS.



We believe that our share of the anti-virus software market in the U.S. and
Europe is significantly smaller relative to the market shares of our principal competitors, despite the growth of our sales in these markets in fiscal 2004 and 2005. Because our competitors are already well-established in these key markets and have
greater financial and other resources and brand recognition, we may not be able to compete effectively for market share. If this happens, we may not be able to increase sales or our market share in these markets, which could materially hurt the
prospects for growth in our business.



Some of our major
competitors have the following advantages over us in the U.S. and European markets:



| |  | greater name recognition;
|- |  | -------------------------



| |  | more diversified product lines;
|- |  | -------------------------------



| |  | larger customer bases; and
|- |  | --------------------------



| |  | significantly greater financial, technical, marketing and other resources.
|- |  | --------------------------------------------------------------------------



As a result, as compared to us, our competitors may be able to:



| |  | better withstand downturns in the anti-virus software market and in the computer software market in general;
|- |  | ------------------------------------------------------------------------------------------------------------



| |  | adapt more quickly to new or emerging technologies or changes in customer requirements; or
|- |  | ------------------------------------------------------------------------------------------



| |  | more effectively and profitably market, sell and support their products.
|- |  | ------------------------------------------------------------------------



WE MAY SUFFER A LOSS OF SALES AND MARKET SHARE IN OUR CORE JAPANSE MARKET IF OUR COMPETITORS ACHIEVE SUCCESS IN JAPAN.



Our major competitors, McAfee, Inc. and Symantec Corporation, are active in
the Japanese anti-virus software market and have allocated significant resources to achieve success in the Japanese anti-virus software market. Although these competitors currently have smaller shares of the Japanese market than us, each has
significantly greater financial, marketing and other resources than we do. Additionally, competition in our core Japanese market could intensify in the future if other competitors emerge. As a result of our competitors efforts, we may not be
able to maintain our current leading market position in Japan in the future. Also, in order to respond effectively to increased competition, we may be required to devote more of our product development, marketing and other resources to the Japanese
market, which could limit our ability to grow in other markets. A material loss of sales and market share in Japan as a result of our competitors success could have a material adverse effect on our business, financial condition and results of
operations.



BECAUSE WE MAY ACQUIRE COMPANIES TO GROW OUR BUSINESS, FUTURE
ACQUISITIONS MAY REDUCE OUR EARNINGS AND RESULT IN INCREASED COSTS IN OUR BUSINESS OPERATIONS.



In a rapidly changing industry, we occasionally review acquisition opportunities. Accordingly, we may seek to expand our business through acquisitions.
Unlike some of our major competitors, we have limited experience in acquiring existing businesses. Future acquisitions could result in numerous risks and uncertainties, including:



| |  | our inability to retain customers, suppliers and other important business relationships of an acquired business;
|- |  | ----------------------------------------------------------------------------------------------------------------



| |  | difficulties in integrating an acquired company into Trend Micro, including the acquired companys operations, personnel, products and information systems;
|- |  | -----------------------------------------------------------------------------------------------------------------------------------------------------------



| |  | diversion of our managements attention from other business concerns; and
|- |  | -------------------------------------------------------------------------



| |  | adverse effects on our results of operations from acquisition-related charges, impairment of goodwill and purchased technology and possible recognition of impairment charge.
|- |  | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------



If we make such an acquisition using our stock, our current
shareholders ownership interests will be diluted. Any of these factors could materially hurt our business, financial condition and results of operations.



- 5 -



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For example, in 2000, we acquired ipTrend to start a new business selling a Linux based remotely managed server appliance
solution to small and medium sized companies. However, ipTrend performed poorly and was liquidated in December 2001. Due to the liquidation of ipTrend, (Yen) 2.3 billion was booked as goodwill write-off in 2001.



IF HACKERS GAIN UNAUTHORIZED ACCESS TO OUR SYSTEMS, WE COULD SUFFER DISRUPTIONS IN OUR
BUSINESS AND LONG-TERM DAMAGE TO OUR REPUTATION.



We may
be more susceptible to problems caused by hackers than other software companies. As an anti-virus software company that delivers virus protection products over the Internet, hackers specifically target us in order to cause us to transmit computer
viruses or interrupt the delivery of our anti-virus software monitoring and security services over the internet which could result in further interruptions. We could suffer substantial disruptions in our business and material damage to our
reputation which could in turn result in a significant loss of our customers and other important business relationships. We could also incur costs for public relations efforts following attacks by hackers. Hacker activities could also force us to
incur substantial costs to fix technical problems or result in hackers gaining access to our proprietary information.



WE FACE NEW RISKS RELATED TO OUR ANTI-SPAM AND ANTI-SPYWARE SOFTWARE PRODUCTS.



Our anti-spam and anti-spyware products may falsely identify emails or programs as unwanted spam or
potentially unwanted programs, or alternatively fail to properly identify unwanted emails or programs, particularly as spam emails or spyware are often designed to circumvent anti-spam or spyware products. Parties whose
emails or programs are blocked by our products may seek redress against us for labeling them as spammers or spyware, or for interfering with their business. In addition, false identification of emails or programs as unwanted
spam or potentially unwanted programs may reduce the adoption of these products.



WE MUST EFFECTIVELY MANAGE OUR GROWTH.



Our business has grown rapidly. This growth has placed, and any future growth would continue to place, a significant strain on our limited personnel, management and other resources. Our ability to manage any future
growth in our business will require us to:



| |  | attract, train, retain, motivate and manage new employees successfully;
|- |  | -----------------------------------------------------------------------



| |  | effectively integrate new employees into our operations; and
|- |  | ------------------------------------------------------------



| |  | continue to improve our operational, financial, management and information systems and controls.
|- |  | ------------------------------------------------------------------------------------------------



If we continue to grow, our management systems currently in place may be inadequate or we may not be able to effectively
manage our growth. In particular, we may be unable to:



| |  | provide effective customer service;
|- |  | -----------------------------------



| |  | develop and deliver products in a timely manner;
|- |  | ------------------------------------------------



| |  | implement effective financial reporting and control systems; and
|- |  | ----------------------------------------------------------------



| |  | exploit new market opportunities and effectively respond to competitive pressures.
|- |  | ----------------------------------------------------------------------------------



WE SELL OUR PRODUCTS THROUGH INTERMEDIARIES WHO MAY NOT VIGOROUSLY MARKET OUR PRODUCTS, OR MAY RETURN OUR PRODUCTS.



We market substantially all of our products to end users through
intermediaries, including distributors, resellers and value-added resellers. Our distributors sell other products that are complementary to, or compete with, our products. While we encourage our distributors to focus on our products, these
distributors may give greater priority to products of other suppliers, including competitors. They may also return the products to us under certain circumstances.



OUR CUSTOMERS MAY CANCEL OR DELAY THEIR PURCHASES OF OUR PRODUCTS, WHICH COULD ADVERSELY AFFECT OUR BUSINESS.



Our products may be considered to be capital purchases by certain enterprise
customers. Capital purchases are often uncertain and, therefore, are canceled or delayed if the customer experiences a downturn in its business prospects or as a result of unfavorable economic conditions. Any cancellation or delay could adversely
affect our results of operations.



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WEAK FINANCIAL CONDITIONS OF SOME OF OUR DISTRIBUTORS MAY ADVERSELY AFFECT OUR OPERATING RESULTS.



Some of our distributors are experiencing financial difficulties worldwide,
which may adversely impact our collection of accounts receivable. We regularly review the collectibility and creditworthiness of our distributors to determine an appropriate allowance for doubtful receivables. Our uncollectible accounts could exceed
our current or future allowance for doubtful receivables, which would adversely impact our operating results.



OUR RESULTS OF OPERATIONS MAY SUFFER IF WE ARE REQUIRED TO PAY SIGNIFICANT AMOUNTS OF PENALTY PAYMENTS PURSUANT TO THE TERMS OF OUR SERVICE LEVEL AGREEMENTS.



We guarantee a certain quality of product support to our customers through
our service level agreements. Pursuant to the terms of these agreements, under some circumstances, we are required to make penalty payments to our customers. For example, if we fail to provide our customers a virus pattern file within two hours of
our receipt of a virus from the customer, the terms of the agreement require us to make a penalty payment to the dissatisfied customer which may amount up to 100% of the initial sale price. We have established reserves based on our assumptions and
estimates. However, our assumptions and estimates may be wrong and our actual total penalty payments could materially exceed our reserves and adversely affect our results of operations and financial condition.



WE RELY HEAVILY ON OUR MANAGEMENT AND TECHNICAL PERSONNEL, WHO MAY NOT REMAIN WITH US IN
THE FUTURE.



We rely, and will continue to rely, on a
number of key technical and management employees, including our Chief Executive Officer, Eva Yi-Fen Chen. While we require our employees to sign employment agreements, our employees are generally not otherwise subject to noncompetition covenants. If
any of our key employees leave, our business, results of operations and financial condition could suffer.



FLUCTUATIONS IN OUR QUARTERLY FINANCIAL RESULTS COULD CAUSE THE MARKET PRICE FOR OUR SHARES AND OUR ADSs TO BE VOLATILE.



We believe that our quarterly financial results may fluctuate in ways that do not reflect the long-term trend of our future financial performance. It
is likely that in some future quarterly periods, our operating results may be below the expectations of public market analysts and investors. In this event, the price of our shares and our ADSs could fall.



Factors which could cause our quarterly financial results to fluctuate
include:



| |  | timing of sales of our products and services due to customers budgetary constraints, seasonal buying patterns and our promotional activities;
|- |  | ----------------------------------------------------------------------------------------------------------------------------------------------



| |  | new product introductions by our competitors;
|- |  | ---------------------------------------------



| |  | significant marketing campaigns, research and development efforts, employee hiring, and other capital expenditures by us to drive the growth of our business;
|- |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  | changes in customer needs for anti-virus software; and
|- |  | ------------------------------------------------------



| |  | changes in economic conditions in our major markets.
|- |  | ----------------------------------------------------



WEAKNESS IN THE JAPANESE ECONOMY MAY HURT OUR BUSINESS PERFORMANCE BECAUSE JAPAN IS OUR LARGEST MARKET.



While our sales in the US and Europe have increased in recent years, we
remain significantly dependent on the Japanese market. Net sales in Japan accounted for approximately 42% of our net sales in fiscal 2003, approximately 41% in fiscal 2004 and approximately 40% in fiscal 2005. In the past three years, the Japanese
economy has performed poorly due to a number of factors, including weak consumer spending and lower capital investment by Japanese companies. We believe the sluggish Japanese economy has hindered growth in our net sales during most of the last three
fiscal years, although it has shown signs of recovering during the last several months. Because of our dependence on the Japanese market, any deterioration in the condition of the Japanese economy could negatively impact our net sales.



- 7 -



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FOREIGN EXCHANGE FLUCTUATIONS COULD LOWER OUR RESULTS OF OPERATIONS BECAUSE WE EARN REVENUES DENOMINATED IN SEVERAL
DIFFERENT CURRENCIES.



Our reporting currency is the
Japanese yen and the functional currency of each of our subsidiaries is the currency of the country in which the subsidiary is domiciled. However, a significant portion of our revenues and operating expenses is denominated in currencies other than
the Japanese yen, primarily the US dollar, euro and the New Taiwan dollar. As a result, appreciation or depreciation in the value of other currencies as compared to the Japanese yen could result in material transaction or translation gains or losses
which could reduce our operating results. These negative effects from currency fluctuations could become more significant if we are successful in increasing our sales in markets outside of Japan. We do not currently engage in currency hedging
activities.



BECAUSE OUR BUSINESS DEPENDS SIGNIFICANTLY ON INTELLECTUAL
PROPERTY, INFRINGEMENT OF OUR INTELLECTUAL PROPERTY COULD HURT OUR BUSINESS.



Our success depends upon the development of proprietary software technology. We rely on a combination of contractual rights and patent, copyright, trademark and trade secret laws to establish and protect proprietary
rights in our software. If we are unable to establish and protect these rights, our competitors may be able to use our intellectual property to compete against us. This could limit our growth and hurt our business. At present, our U.S. consolidated
subsidiary holds seven issued US patents and our Taiwan consolidated subsidiary holds four issued U.S. patents. It is possible that no additional patents will be issued to us or any of our subsidiaries. In addition, our issued patents may not
prevent other companies from competing with us. We also enter into confidentiality agreements with our employees and license agreements with our customers, and limit access to our proprietary information and its distribution. However, we cannot
guarantee that any of these measures will discourage others from misappropriating our technology or independently developing similar technology.



PRODUCT LIABILITY CLAIMS ASSERTED AGAINST US IN THE FUTURE COULD HURT OUR BUSINESS.



Our products are designed to protect customers network systems and personal computers from damage caused by computer
viruses. As a result, if a customer suffers damage from viruses, the customer could sue us on product liability or related grounds, claim damages for data loss or make other claims. Additionally, as viruses are constantly evolving, purchasers of our
software products must regularly update the software they have purchased from us with virus protection files that we make available for download from our website. Should we fail to properly test these virus protection files and distribute a
defective file, these files could cause damage to the personal computers of our customers who have downloaded a defective file. For example, a file that we distributed on April 23, 2005 for an approximately 90 minute-period caused the computers
of those updating with the file to slow and, in some cases, shut down. Cases of our files damaging the computers or our customers could lead to significant damage to our reputation and customers could sue on product liability or related grounds.
Furthermore, starting in 2001, we began selling hardware devices which could give rise to a higher incidence of product liability claims than we have up until now experienced. Our license agreements typically contain provisions, such as disclaimers
of warranty and limitations of liability, which seek to limit our exposure to certain types of product liability claims. However, in some jurisdictions these provisions may not be enforceable on statutory, public policy or other grounds. We
currently do not carry product liability insurance covering claims arising in the United States. Damage to our reputation or successful product liability or related claims brought against us could materially harm our business.



OUR BUSINESS FACES THE RISK OF INTERRUPTION FROM POWER SHORTAGES, EARTHQUAKES, OUTBREAK OF
BIOLOGICAL VIRUSES AND OTHER HAZARDS.



We face a number of
potential business interruption risks that are beyond our control. The State of California experienced intermittent power shortages in 2000, sharp increases in the cost of energy and even interruptions of service to some business customers. If power
shortages continue to be a problem, our business may be materially adversely affected. Additionally, we may experience natural disasters that could interrupt our business.



Tokyo, where our corporate headquarter is located, is near a major earthquake fault. The impact of a major earthquake on our
facilities, infrastructure and overall operations is not known. There is no guarantee that an earthquake would not seriously disturb our entire business operations. We are largely uninsured for losses and business disruptions caused by an earthquake
and other natural disasters.



In addition, many of the key
countries and regions in which we operate have sustained negative economic impact from events such as the continued fear of future terrorist attacks and the outbreak of severe acute respiratory syndrome, or SARS. Prolonged continuation of these
adverse factors may hurt our results of operations and financial condition.



- 8 -



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WE MAY HAVE TO CONSTRAIN OUR BUSINESS ACTIVITIES TO AVOID BEING DEEMED AN INVESTMENT COMPANY UNDER THE US INVESTMENT
COMPANY ACT OF 1940.



In general, a company which is or
holds itself out as being engaged primarily in the business of investing, reinvesting or trading in securities, may be deemed to be an investment company under the U.S. Investment Company Act of 1940. We do not believe that we are an investment
company as defined under the U.S. Investment Company Act of 1940. However, if we were to be deemed an investment company, we would be prohibited from issuing our securities in the United States and may have to terminate our U.S. listing or other
sponsorship promoting a U.S. trading market for our issued securities. In order to avoid these prohibitions, we may be forced to forego otherwise attractive business opportunities, potentially limiting our growth and our profitability.



BECAUSE OF THE INFLUENCE OF OUR PRINCIPAL SHAREHOLDERS, OUR OTHER SHAREHOLDERS MAY BE
UNABLE TO INFLUENCE OUR BUSINESS.



Our principal
shareholders, including major shareholders who beneficially own more than 5% of the issued shares of our common stock and directors, beneficially owned approximately 34.4% of our outstanding shares as of December 31, 2005. These shareholders,
if they act together, would be able to significantly influence all matters requiring approval by our shareholders, including the election of directors and the approval of mergers or other business combination transactions. Our principal shareholders
may have strategic or other interests that conflict with the interests of our other shareholders. As a result, the concentration in our shareholdings may have the effect of delaying or preventing a change in control of Trend Micro, which could
result in the loss of a significant financial gain to our shareholders.



OUR
STOCK PRICE IS VOLATILE, AND INVESTORS BUYING THE SHARES OR ADSs MAY NOT BE ABLE TO RESELL THEM AT OR ABOVE THEIR PURCHASE PRICE.



Shares of our common stock are traded on the Tokyo Stock Exchange, which is the principal market for our shares. Recently, the U.S. and Japanese
securities markets have experienced significant price and volume fluctuations. The market prices of securities of high-tech companies, and internet companies in particular, have been especially volatile. Since trading in our shares commenced on the
Tokyo Stock Exchange on August 17, 2000, our stock price has fluctuated between a low of (Yen) 1,440 and a high of (Yen) 9,005. Since trading in our ADSs commenced on the Nasdaq National Market on July 8, 1999, the price of our ADSs has
fluctuated between a low of $12.16 and a high of $159.38. The closing price on the Tokyo Stock Exchange for our stock on May 31, 2006 was (Yen)3,840, and the closing price on the Nasdaq National Market for our ADSs on May 31, 2006 was
$35.00 per ADS. The market price of our shares and ADSs is likely to fluctuate in the future.



BECAUSE OF DAILY PRICE RANGE LIMITATIONS UNDER JAPANESE STOCK EXCHANGE RULES, YOU MAY NOT BE ABLE TO SELL YOUR SHARES OF OUR COMMON STOCK AT A PARTICULAR PRICE ON ANY PARTICULAR TRADING DAY, OR AT ALL.



Stock prices on Japanese stock exchanges are determined
on a real-time basis by the equilibrium between bids and offers. These exchanges are order-driven markets without specialists or market makers to guide price formation. To prevent excessive volatility, these exchange set daily upward and downward
price fluctuation limits for each stock, based on the previous days closing price. Although transactions may continue at the upward or downward limit price if the limit price is reached on a particular trading day, no transactions may take
place outside these limits. Consequently, an investor wishing to sell at a price above or below the relevant daily limit may not be able to sell his or her shares at such price on a particular trading day, or at all.



THE RIGHTS OF SMALL SHAREHOLDERS ARE LIMITED UNDER THE JAPANESE UNIT SHARE SYSTEM.



Our Articles of Incorporation provide that 500 shares of
our common stock constitute one unit. The Japanese Company Law (as defined in Item 10.B) restricts the rights of shares that do not constitute whole units. Holders of shares constituting less than one unit do not have the right to
vote. Each ADS offered in the offering represents the right to receive one share. A holder who owns less than 500 ADSs will indirectly own less than a whole unit. Under the deposit agreement governing the rights of ADS holders, in order to withdraw
any shares, an ADS holder must surrender ADRs evidencing 500 ADSs or a multiple of 500 ADSs. Each ADR will bear a legend to that effect. Under the unit share system, holders of less than a unit have the right to require us to purchase their shares.
Holders of ADSs that represent other than multiples of whole units cannot withdraw the underlying shares representing less than one unit. They will, therefore, be unable, as a practical matter, to:



| |  | exercise the right to require us to purchase the underlying shares, or
|- |  | ----------------------------------------------------------------------



- 9 -



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| |  | receive cash settlement in lieu of withdrawal.
|- |  | ----------------------------------------------



As result, as a holder of ADSs, you will not be able to access the Japanese markets through the withdrawal mechanism to sell shares in lots of less than
one unit.



AS A HOLDER OF ADSs, YOU WILL HAVE FEWER RIGHTS THAN A
SHAREHOLDER HAS AND YOU WILL HAVE TO ACT THROUGH THE DEPOSITARY TO EXERCISE THOSE RIGHTS.



The rights of shareholders under Japanese law to take actions, including voting their shares, receiving dividends and distributions, bringing derivative actions, examining our accounting books and records and
exercising appraisal rights are available only to holders of record. Because the depositary, through its custodian agents, is the record holder of the shares underlying the ADSs, only the depositary can exercise those rights in connection with the
deposited shares. The depositary will make efforts to vote the shares underlying your ADSs as instructed by you and will pay you the dividends and distributions collected from us. However, in your capacity as an ADS holder, you will not be able to
bring a derivative action, examine the accounting books and our records or exercise appraisal rights through the depositary.



RIGHTS OF SHAREHOLDERS UNDER JAPANESE LAW MAY BE MORE LIMITED THAN UNDER THE LAW OF OTHER JURISDICTIONS.



Our Articles of Incorporation, our Board of Directors regulations and
the Japanese Company Law govern our corporate affairs. Legal principles relating to such matters as the validity of corporate procedures, directors and officers fiduciary duties and shareholders rights may be different from those
that would apply if we were a non-Japanese company. For example, under the Japanese Company Law, only holders of 3% or more of the issued and outstanding shares are entitled to examine our accounting books and records. Shareholders rights
under Japanese law may not be as extensive as shareholders rights under the laws of other countries. You may have more difficulty in asserting your rights as a shareholder than you would as a shareholder of a corporation organized in another
jurisdiction. In addition, Japanese courts may not be willing to enforce liabilities against us in actions brought in Japan which are based upon the securities laws of the United States or any U.S. state.



Item 4. Information on the Company.



A. History and Development of the Company.



We develop, market and support antivirus and Internet content security
software and services. Our legal name in Japan is Trend Micro Kabushiki Kaisha and Trend Micro Incorporated in the United States. Our commercial name in both Japan and the United States is Trend Micro. Founded in 1988 by Steve Chang, we led the
migration of virus protection from the desktop to the network server and the Internet gateway. Today, through Trend Micro Enterprise Protection Strategy, we focus on providing customers with an approach to managing the impact of mixed threats such
as the NIMDA and Code Red viruses.



We were established in 1989
as a Taiwanese company. Through a series of transactions in August 1996, Trend Micro Kabushiki Kaisha (a joint stock corporation) which was established in October 1988, became the parent company of the Trend Micro group.



Our head office is located at Shinjuku MAYNDS Tower, 1-1, Yoyogi 2-Chome,
Shibuya-ku, Tokyo 151-0053, Japan. Our telephone number is 81-3-5334-3600. Our North American headquarter is in Cupertino, California, U.S.A. and we have business units worldwide. We have no agent in the United States in connection with this annual
report.



We began commercial operations in May 1989, shortly
after computer viruses were first detected, and we completed our initial public offering on the Japanese over-the-counter market in August 1998. We listed American Depositary Shares on the Nasdaq National Market in July 1999 in connection with a
global offering of 12,750,000 shares in the form of shares and ADRs. In August 2000, we listed on the first section of Tokyo Stock Exchange.



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We currently have more than 2,900 employees and are represented more than 30 countries.



B. Business Overview.



INDUSTRY BACKGROUND



A computer virus is a programa piece of executable codethat has the unique ability to replicate. Like biological viruses, computer viruses can
spread quickly and are often difficult to eradicate. With email now used as an essential business communication tool, viruses are spreading faster than ever. Viruses attached to email messages can infect an entire enterprise in a matter of minutes,
which may cost companies millions of dollars annually in lost productivity and clean-up expenses. Mixed-threat attacks like NIMDA and MSBlast, threaten computer systems at multiple levels.



Today the threats on the network such as computer viruses, spyware, spam and
phishing are not the nature that can be predicted beforehand and treated with all possible measures. It seems there is now a requirement for enterprises and individuals to deploy security measures against new network threats and crimes which can
cause monetary damages and disable networks around the world.



To enhance our capability against new threats evolving day by day, we acquired InterMute Inc. which provides anti-spyware technologies and Kelkea Inc. which provides IP filtering and reputation services in 2005.



In response to the virus threat above, the antivirus software market has
grown significantly in the past few years and expected to continue to grow in the future.



According to International Data Corporation, an independent research organization, in December 2005, the anti-virus industry, which we belong to, will increase from $3.7 billion in 2004 to $7.3 billion in 2009 and is
estimated to expand at a compound annual growth rate of around 15% from 2005 to 2009.



Our vision is to create A world safe for exchanging digital information. We offer solutions to prevent the invasion of viruses and other malicious content into corporate networks, small and medium business
networks and individual PCs.



Network systems including the
Internet are an integral part of corporate activities and life at home. However, the methods viruses use to access computers have become more elaborate and malicious, causing serious problems for users. Furthermore, problems are arising where
spyware, spam and inappropriate Web use diminish the functionality and efficiency of network and Internet use.



Against this backdrop, the needs of corporate networks and individual users for security vendors have expanded and intensified. Our role extends beyond
merely developing and selling security products. We also provide services to offer a more effective security solution. Through this business model, we are contributing to the development of a safe digital society around the world.



Our products and services have evolved with the development of the antivirus
software market. Initially, our sales of antivirus software products consisted primarily of sales of our desktop programs, such as PC-cillin/Virus Buster, which were introduced in Japan in 1991. To meet increased demand for network-based products as
companies shifted from stand-alone desktop PCs to client-server enterprise networks in the early 1990s, we introduced LANprotect, our first server application, in 1993. To address the increased risk of virus infection for enterprise networks
resulting from widespread use of the Internet, we introduced InterScan VirusWall in 1996 to provide real-time scanning at the Internet gateway, the point where data enters the network from the Internet. In 1998, we introduced Trend Virus Control
System, the forerunner of Trend Micro Control Manager (described below), which enabled network-wide antivirus software to monitor, update and manage from a central management console. Since 1998 we have continued to develop our Internet security
solutions, and in 2002 we unveiled Trend Micro Enterprise Protection Strategy, which is described below.



Trend Micro Enterprise Protection Strategy



Trend Micro Enterprise Protection Strategy, our threat and outbreak management strategy to prevent computer viruses, is implemented using centralized management of an integrated security suite and outbreak prevention
appliance. This solution is supported by real-time, threat-specific knowledge from TrendLabs, Trend Micros global network of security experts.



We help and enable IT managers to proactively manage the outbreak lifecycle. This lifecycle consists of four phasesvulnerability prevention,
outbreak prevention, virus response and assessment and restoration.



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Vulnerability Prevention



In this phase, vulnerability assessment tools help enforce security policies, block noncompliant devices from network access
and isolate specific threat-related vulnerabilities to pre-empt attacks. Trend Micro Vulnerability Assessment is a key product component of this phase. Centrally managed by Trend Micro Control Manager, a centralized outbreak management console,
Vulnerability Assessment integrates with other Trend Micro products and services to identify vulnerabilities in the network. Vulnerability Assessment determines risk ratings to alert IT managers of specific viruses correlated with system
vulnerabilities and identifies patches needed to prevent exploits. Leveraging data from Vulnerability Assessment, Trend Micro Network VirusWall (described below) assists IT managers to selectively perform the following actions:



| |  | Isolate unpatched machines for Microsoft operating system vulnerabilities before or at the onset of an outbreak.
|- |  | ----------------------------------------------------------------------------------------------------------------



| |  | Quarantine infected LAN segments to stop virus propagation.
|- |  | -----------------------------------------------------------



| |  | Check devices for the latest pattern files, scan engine, and antivirus software from major antivirus vendors, to control network access of noncompliant machines.
|- |  | -----------------------------------------------------------------------------------------------------------------------------------------------------------------



Outbreak Prevention



The outbreak prevention phase is the critical period when a threat has been
identified, but a pattern file or patch has not yet been deployed. Without sufficient information, IT managers struggle not only to identify protective actions but also to deploy them effectively across the organization. Trend Micro Outbreak
Prevention Services include outbreak prevention policies, which are strategic recommendations to manage the various methods in attacking viruses and to assist IT managers in deflecting, isolating, and stopping virus outbreaks. Through Trend Micro
Control Manager, outbreak prevention policies can be deployed manually or automatically to block any combination of file extensions, executables, IP addresses, ports, instant message channels, and file transfer protocols. IT managers can use
outbreak prevention policies to perform the following actions:



| |  | Keep viruses from propagating and impeding network traffic;
|- |  | -----------------------------------------------------------



| |  | Automatically activate Trend Micro Damage Cleanup Services (described below) to ease administrative burden; and
|- |  | ---------------------------------------------------------------------------------------------------------------



| |  | Generate detailed reports for threat analyses.
|- |  | ----------------------------------------------



Virus Response



The virus response phase of the outbreak lifecycle occurs during the deployment of a pattern file, network signature, or patch. This reactive phase is the
single focus of most antivirus products. In contrast, Trend Micro Control Manager coordinates virus response with outbreak prevention policies to enable proactive outbreak lifecycle management from a central console. Our scanning engines provide IT
managers with the following benefits:



| |  | Comprehensive protection with virus scanning and detection at both the network layer and the application layer;
|- |  | ---------------------------------------------------------------------------------------------------------------



| |  | Increased accuracy, scanning performance and virus detection with scanning engines that search for viruses based on the identified threat; and
|- |  | ----------------------------------------------------------------------------------------------------------------------------------------------



| |  | A guarantee (Trend Micro Service Level Agreement) that new virus pattern files will be delivered within two hours of virus case submission or Trend Micro will pay a certain penalty
fee depending on the terms of the agreement entered into with the customer.
|- |  | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



Assessment and Restoration



The assessment and restoration phase of the outbreak management lifecycle is the period after a pattern file, network signature, or patch is deployed and the virus has been contained. Cleaning the network of virus remnants and restoring
systems is tedious and costly because most organizations perform these tasks manually. In contrast, Trend Micro Damage Cleanup Services automate clean-up and restoration to mitigate administrative cost and burden. Centrally managed through Trend
Micro Control Manager, Damage Cleanup Services feature agent-less remote deployment, allowing IT managers to assess, clean, and restore infected PCs and servers located in remote locations without end-user intervention. Damage Cleanup Services are
designed to result in cost-effective clean-up by helping IT managers do the following:



| |  | Prevent re-infection by removing memory resident worms and Trojans (a type of virus that can conceal itself) and their effects, such as unwanted registry entries and viral files;
|- |  | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



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| |  | Reduce administrative burden via coordination with outbreak prevention policies; and
|- |  | ------------------------------------------------------------------------------------



| |  | Perform consistent clean up aided by detailed reports from Trend Micro Control Manager.
|- |  | ---------------------------------------------------------------------------------------



Distribution of a Defective Virus Pattern File in April 2005



On April 23,2005, Trend Micro published pattern file 2.594.00 with the intent to protect customers from a new type of
BOT virus that could cause an infected PC to become a launching point for spam. Given the number of variants of this threat and what they are designed to do, we believe they have the potential to cause great damage to users and puts at risk the
safety and integrity of the networks through which they might spread. Unfortunately, pattern file 2.594.00, which employed a new, generic unpacking and heuristic script technology designed to detect and eliminate these new types of BOT viruses and
their variants, generated some performance conflict with computers running on Microsoft Windows XP and certain other operating systems. As a result, this caused the impacted machines to experience high CPU consumption and subsequent system
instability.



For any customers experiencing instability, Trend
Micro has provided a set of solutions which can be found under the Support section of Trend Micros website. Additionally, Trend Micro has extended support hours especially to help those customers who had this special intersection of
circumstances and were affected by this issue. Trend Micro continued testing in order to fully understand initial assessments and fix the issue. We found that the pattern file caused performance issues on systems with Scan Engine 7.5 and above while
scanning a particular type of executable file found in certain versions of operating system service packs. Owing to a large number of variants discovered by our researchers of a particular BOT threat (each of which used a different compression
algorithm), Trend Micro enhanced the decompression ability of its pattern file with a view to prevent further variants of this BOT from infecting customers. However, within pattern file 2.594.00, TrendLabs included support for 3 additional heuristic
patterns, including UltraProtect decompression support, which is used by several WORM_RBOT variants. Due to an isolated anomaly in the engineering, development and pattern release process, the UltraProtect decompression may in certain circumstances
cause some systems to experience high CPU power consumption, which can lead to system instability when this specific file type is scanned using pattern file 2.594.00.



Through its analysis, Trend Micro has determined that while pattern file 2.594.00 was designed to prevent several new
variants of a fairly new type of BOT threat from infecting its customers, the issues with pattern file 2.594.00 were caused by how the testing was conducted for this type of solution. Therefore, we are taking the following steps to ensure that
future instances of this issue do not occur.



| |  | We have invested in additional resources to immediately improve our development, review, testing and monitoring processes to ensure efficient execution of Trend Micro virus pattern
signatures.
|- |  | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  | We are developing an automated method within the tool used to create virus pattern signatures. This automation would help to determine the potential for possible future instances of
high CPU utilization caused by our pattern files.
|- |  | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  | We are enhancing the Scan Engine to include a self-monitoring mechanism.
|- |  | ------------------------------------------------------------------------



We are increasing the scope and support of our testing coverage and of our processes to prevent reoccurrence of such issues.



Trend Micro Products and Services



Our products and services are designed to deliver coordinated protection at
the file, application, data, and network layers to proactively manage the outbreak lifecycle. Our solutions, described in more detail below, operate across a range of computer operating system platforms, including Windows Server 2003, Windows NT,
Windows 98/XP/2000, Linux, Sun Solaris and several versions of UNIX. Our products protect all entry points in the network.



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Management Products



Control Manager



Trend Micro Control Manager is a centralized outbreak management console designed to simplify enterprise-wide coordination of outbreak security
actions and management of Trend Micro products and services. Trend Micro Control Manager acts as a central command center for deployment of Trend Micros threat-specific expertise across the network and to select third-party products to
proactively manage outbreaks.



Designed to deliver the
flexibility and scalability organizations need, Trend Micro Control Manager offers a multi-tier management structure with extensive customization options for expanded control. Robust graphical reporting provides vital security insights such as
sources of infections or vulnerabilities and consolidated, detailed information regarding virus events or unusual activities



Network VirusWall 2500



Network VirusWall 2500 delivers security unmatched by any other appliance vendor. It stops network worms and vulnerability exploits with complete
accuracy. To prevent infection, it enforces security policies by blocking noncompliant devices from network access (for remediation). It isolates infected network segments and automates remote clean up in case of outbreak.



Network VirusWall 2500 is deployed inline with network traffic to address the
threat to network security from network worms. It protects up to 4096 concurrent users with a 10/100/1000 Gigabit Ethernet  copper + fiber interface and features flexible configurations for high availability and redundancy to protect
enterprises and mission-critical applications from attack. Four additional ports allow Network VirusWall 2500 to protect multiple network segments or servers.



Network VirusWall 1200



Network VirusWall 1200 delivers security unmatched by any other appliance vendor. It stops network worms and vulnerability exploits with complete
accuracy. To prevent infection, it enforces security policies by blocking noncompliant devices from network access (for remediation). It also isolates infected network segments and automates remote clean up in case of outbreak.



Network VirusWall 1200 is deployed inline with network traffic at a local
area network (LAN) or virtual private network (VPN) segment to addresses the threat to network security from worms. It features a 10/100 Base-T Ethernet interface to protect up to 256 users with two ports and one inline segment.



Network VirusWall 300



Trend Micro Network VirusWall 300Outbreak Prevention
Appliance for Mission-Critical Devices Security products such as desktop or host-based antivirus, firewalls, and intrusion detection systems cannot effectively stop network worms from propagating to remote devices. Network worms can degrade network
performance and take mission critical devices offline.



Trend
Micro Network VirusWall 300 is an outbreak prevention appliance designed to protect mission-critical devices (examples: ATMs, self-service kiosks, medical devices, etc.) from network worms and to clean up infections to keep worms from
spreading. Because there are no hardware or software compatibility issues with the appliance, enterprises can deploy Network VirusWall 300 to protect any IP-enabled device.



Unlike security solutions that monitor threats or provide threat information only, Network VirusWall 300 deploys
threat-specific knowledge from TrendLabs(SM) at network end points to help organizations prevent or mitigate damage from worms. Network VirusWall appliances help organizations improve their operational resilience by lowering security risks, easing
the virus outbreak management burden, and reducing system downtime.



Internet Gateway Products



Spam
Prevention Solution seamlessly integrates with InterScan Messaging Security Suite to combine high-performance spam protection with leading antivirus and content filteringall in a single platform at the Internet messaging gateway. The
anti-spam module features a powerful new composite engine that blends advanced heuristics, signature filters, blacklists/whitelists, and improved multi-lingual detectiona breakthrough for blocking spam and phishing attacks at higher catch
rates and with fewer false positives.



To enhance our
capability of anti-spam, we acquired Kelkea, Inc. which provides IP filtering and reputation services.



InterScan Messaging Security Suite



InterScan Messaging Security Suite integrates high-performance antivirus and content filtering securityplus the optional Trend Micro
Spam Prevention Solution with anti-spam and anti-phishingall in a single platform at the Internet messaging gateway. As an integrated solution, it filters SMTP and POP3 traffic to stop viruses, spam, phishing, and mixed threat attacks at the
networks most critical point of entry. A centralized management console enables administrators to set coordinated policy, automate updates, and control message compliancefor a more effective, unified defense.



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InterScan Web Security Suite



Trend Micro InterScan Web Security Suite provides the first line of defense against multiple Web-based
threatsblocking attacks at the gateway. It guards against viruses, spyware, grayware, and phishing, and offers optional security modules to combat malicious mobile code and manage employee Internet use. The suite integrates with optional Trend
Micro Damage Cleanup Services to remove threats and restore infected files. As a fully integrated solution, it is easy to deploy, manage, and maintainlowering the total cost of ownership.



InterScan VirusWall



InterScan VirusWall provides high-performance, comprehensive Internet
gateway protection against viruses and malicious code. The optional eManager plug-in offers administrators additional tools for spam blocking, content filtering, and email scheduling.



InterScan eManager



InterScan eManager provides real-time content filtering, spam blocking, and reporting to help companies monitor and control the type of
information that enters or leaves the network. The optional eManager plug-in integrates seamlessly with InterScan VirusWall to safeguard intellectual property and confidential information, block inappropriate email and attachments, and protect
against viruses. eManager also enables Trend Micro Outbreak Prevention Services to provide proactive protection against virus outbreaks by deploying attack-specific policies to contain the outbreak.



InterScan AppletTrap



InterScan AppletTrap protects against known and unknown
malicious applets, ActiveX, JavaScript, and VBScript code at the Internet gateway. AppletTrap features patented technologies including Java instrumentation to monitor applet behavior in real time. Its patented, multi-tiered process safeguards
enterprise computing environments through analysis and verification of digital certificates, filtering for known malicious code, and monitoring the behavior of unsigned code at the client browser to help protect against unknown malicious applets. A
centrally managed policy-based management tool, AppletTrap requires no client deployment and is transparent to end users.



InterScan WebProtect for ISA



Easy to handle, integrated, industry-leading antivirus solution for Microsoft ISA Servers.



InterScan Antivirus for Sendmail



Trend Micro InterScan Antivirus for Sendmail delivers scalable, high-performance protection against
viruses and other forms of malicious code that enter SMTP traffic. This targeted solution enables Sendmail Switch Edition customers to benefit from the leading Internet gateway virus security#1 for five years in a row, according to an IDC
analyst report. The security application can be centrally managed through Sendmails unique console, providing a familiar interface for administrators to adjust and enforce security policies for all PCs across the enterprise.



Network Reputation Services



As the first line of defense, Trend Micro Network Reputation Services
stop up to 80% of spam at its sourcebefore it can flood your network, overload mail gateway security, and burden IT resources. To block spam, the IP address of incoming mail is verified against one of the worlds largest and trustworthy
reputation database of known spam sources. Plus, Dynamic Real-Time Spam Blocking identifies new sources of spam, even zombies and botnets, as soon as they begin spamming.



Network Reputation Services integrate with Trend Micros messaging gateway security solutionInterScan
Messaging Security Suite and Spam Prevention Solutionfor a 3-in-1 defense against viruses, spam, phishing, and mixed threat attacks. By reducing spams impact on the gateway, reputation services allow messaging security to run at optimal
efficiency.



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Email, Messaging & Groupware Products



ScanMail for Microsoft Exchange



Trend Micro ScanMail for Microsoft Exchange guards against
viruses, Trojans, worms, and other malicious code hidden in email attachments. By filtering inbound/outbound SMTP connector-level traffic, it blocks threats before they can enter or leave the mail server. For additional security, Trend Micro
ScanMail Suite for Microsoft Exchange combines virus protection with new anti-spam and advanced content filtering technology. A centralized management console makes it easy to deploy group configurations, scan settings, notifications, and automatic
updatesacross all Exchange servers.



ScanMail
eManager



ScanMail eManager provides
real-time content filtering, spam blocking, and reporting to help companies monitor and control the type of information that enters or leaves the network. The optional eManager plug-in integrates seamlessly with ScanMail for Microsoft
Exchange and ScanMail for Lotus Notes to safeguard intellectual property and confidential information, block inappropriate email and attachments, and protect against viruses. eManager also enables Trend Micro Outbreak Prevention Services
to provide proactive protection against virus outbreaks by deploying attack-specific policies to contain the outbreak.



ScanMail for Lotus Domino



ScanMail for Lotus Domino 3.0 offers comprehensive virus protection and content security for Lotus Domino/Notes environments. It scans
email in real time for viruses and spyware hidden within email attachments and databases. Unlike many other security products, ScanMail for Lotus Domino was specifically designed for use as a Lotus Domino server application and is optimized for
high-performance scanning.



ScanMail Suite for Lotus Domino 3.0
also provides anti-spam and systematic content filtering for an additional layer of protection. Both solutions currently support Microsoft Windows, Sun Solaris, Linux on x86, IBM AIX, and i5/OS //
OS/400.



Trend Micro IM Security for
Microsoft Office Live Communications Server



Trend Micro IM Security for Microsoft Office Live Communications Server (LCS) delivers advanced protection from malicious code and inappropriate content. IM Security can be centrally managed and administered, and runs with
minimal performance impact to LCS. Incident-based archives support quick and easy searches for content violations. Complete with instant notification through LCS and comprehensive real-time reporting, IM Security helps administrators deploy and
maintain a virus-free IM environment with secure content.



File Server & Storage Products



ServerProtect for Microsoft Windows/Novell NetWare



ServerProtect provides comprehensive antivirus scanning for servers, detecting and removing viruses from files and compressed files in real time  before they reach the end user. Administrators can use a
Windows-based console for centralized management of virus outbreaks, virus scanning, virus pattern file updates, notifications, and remote installation. ServerProtect supports Microsoft Windows Server 2003, Microsoft Windows 2000,
Microsoft Windows NT 4, and Novell NetWare servers.



ServerProtect for Network Appliance filers



ServerProtect provides antivirus scanning for Network Appliance filers, detecting and removing viruses from files and compressed files in real time - before they reach the end user. Administrators can use a Windows-based console
for centralized management of virus outbreaks, virus scanning, virus pattern file updates, notifications, and remote installation.



ServerProtect for EMC Celerra



ServerProtect provides antivirus scanning for EMC Celerra file servers, detecting and removing viruses from files and compressed files
in real time - before they reach the end user. Administrators can use a Windows-based console for centralized management of virus outbreaks, virus scanning, virus pattern file updates, notifications, and remote installation.



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ServerProtect for Linux



Trend Micro ServerProtect for Linux provides comprehensive real-time protection and cleaning against
computer viruses, Trojans, and worms for Linux servers and desktops. Managed through an intuitive, Web-based management console - now with Mozilla support - ServerProtect allows centralized virus scanning, pattern updates and event reporting.
ServerProtect can easily manage virus maintenance tasks such as initiating on-demand scanning, printing/exporting/purging virus logs and setting parameters for real-time scanning.



PortalProtect for SharePoint



Trend Micro PortalProtect provides comprehensive virus protection and content filtering for Microsoft
SharePoint Portal Server 2003 and Windows SharePoint Services. Real-time, scheduled, and manual scans prevent viruses, Trojans, worms, and other malicious code from entering or residing in the portal, while content filtering blocks
potential threats and unwanted content. It is built on Trend Micros award-winning scan engine and tightly integrates with the Microsoft antivirus APIfor optimal security and high-speed performance with minimal impact on system resources.



A Web-based management console offers secure, convenient
access to management tools, including customized reports and activity logs. Plus, it automatically deploys scan engine and pattern file updatesfor protection from the latest threats.



Trend Micro Housecall Server Edition



Trend Micro HouseCall Server Edition is a browser-based
application that allows users to quickly scan and clean their PCs of malware before they access the network. Strategically placed at user access points, HouseCall Server Edition acts as a checkpoint station to protect network resources from viruses
and spyware that enter when users access the network with infected machines. It lowers the risk of infection while providing users with a valuable service. HouseCall Server Edition helps organizations reduce help desk and support costs, protect
sensitive data, and maintain customers trust. The Web-based service is easy to deploy and use, avoiding high implementation and user training costs. Deployed on an intranet or extranet server, HouseCall Server Edition complements antivirus and
anti-spyware solutions from major security vendors.



Desktop Products



OfficeScan



Trend Micro OfficeScan Client/Server
Edition protects enterprise networks from viruses, Trojans, worms, hackers, and network viruses, plus spyware and mixed threat attacks. As an integrated solution, it guards desktops, laptops, and network servers, while the Web-based management
console makes it easy to set coordinated security policy and deploy automatic updates on every client and server. By integrating with Trend Micro Network VirusWall or any Network Admission Control (NAC) device, OfficeScan can enforce
policy on non-compliant computers, and then remedy, redirect, restrict, deny, or permit network access.



Trend Micro Anti-Spyware Enterprise Edition



Trend Micro Anti-Spyware Enterprise Edition is a standalone anti-spyware solution that protects clients and servers with superior spyware detection
and cleanup supported by true enterprise-class management. It stops spyware from installing by actively monitoring file downloads. A highly efficient spyware database and heuristic rule set scan and clean clients accurately, with a small footprint.
It is the only product that includes Trend Micro CWShredder to eradicate CoolWebSearch browser hijackers. Centralized management eases administration and deployment while supporting large organizations needs for scalability at multiple
levels. Anti-Spyware Enterprise Edition is compatible with major enterprise desktop security products.



PC-cillin Internet Security



Trend Micro PC-cillin Internet Security 2006 combines award-winning antivirus security and a personal firewallfor comprehensive
protection against viruses, worms, Trojans, and hackers. It also detects and removes spyware and blocks spam. It even guards against identity theft by blocking phishing and pharming attacks. Plus, PC-cillin protects wireless network with Wi-Fi
Intrusion Detection, an innovative security feature that alerts users when an intruder uses Wi-Fi connection.



Trend Micro Anti-Spyware



Trend Micro Anti-Spyware is a comprehensive spyware detection and removal solution, designed especially for home users. Built on technology that has
shipped on more new PCs from major computer manufacturers than any other anti-spyware product available, it features solid detection capabilities to help identify and halt attacks before they can cause unrecoverable damage. Unlike other spyware
products, Trend Micro Anti-Spyware features thorough cleaning technology to help ensure proper removal of unwanted spyware remnants.



To enhance our capability of anti-spyware, we acquired InterMute, Inc. which provides anti-spyware technologies.



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Trend Micro Home Network Security



Trend Micro Home Network Security combines Internet security
technology built into select models of home routers with award-winning Internet security on each PC. As an integrated hardware/software solution, it provides seamless, easy-to-use protection for your entire home network. A single, convenient
subscription guards against viruses, hackers, spyware, spam, and mixed threat attacks. Plus, router-based Parental Controls make it easy to manage your childrens Web surfing activitieswithout having to install software on each PC.



Mobile Security Products



Trend Micro Mobile Security



As the number of data-centric mobile devices grows, industry analysts expect
them to become the next target of virus writers. Users can protect their smartphone or wireless handheld against these threats with Trend Micro Mobile Security. Trend Micro Mobile Security helps protect data-centric mobile devices from the
evolving threats of viruses and SMS text message spam. The mobile security solution enables mobile operators to maximize airtime, revenues, and customer satisfaction and minimize the customer service calls and churn resulting from virus infections.
Enterprises can use Trend Micro Mobile Security to mitigate virus threats from handheld devices and ensure mobile-user productivity.



Small and Medium Business Products



Trend Micro Security Solutions save time, effort and money for SMBs with limited IT resources. They are easy to deploy, effortless to maintain and offer
comprehensive protection.



Trend Micro Anti-Spyware for
SMB



Trend Micro Anti-Spyware for Small and
Medium Businesses (SMBs) is the valuable standalone anti-spyware solution that automatically delivers best-in-class spyware detection and removal capabilities to networked PCs and servers. Using real-time protection to help stop spyware from
operating, installing, or downloading to PCs and servers, Trend Micro Anti-Spyware for SMB helps prevent information leakage and enhances privacy protection.



The proven solution shares the same trusted technology that has been preinstalled on over 6 million PCs by major computer manufacturers. With its
silent deployment, automatic updates, and remote management capabilities, Trend Micro Anti-Spyware for SMB provides worry-free spyware protection that busy IT managers can set and forget.



Client Server Security for SMB



Trend Micro Client Server Security for SMB protects PCs and Windows servers, against viruses and hackers in an
all-in-one integrated defense. It dramatically simplifies security management for businesses who demand a worry-free approach. Automatic Threat Protection eliminates the time and costs of manually dealing with viruses, worms, and other malicious
code. Its like having a virtual 24/7 security staff. In addition, the complexity and the effort necessary to protect your business from multiple Internet threats are reduced by an all-in-one Integrated Defense. Finally, Zero Administration
relieves users of managing security solutions so they can stay focused on their business.



Client Server Messaging Security for SMB



Trend Micro Client Server Messaging Security for Small and Medium Business protects PCs, Windows servers, and Microsoft Exchange servers against viruses, spam and hackers in an all-in-one integrated
defense. Trend Micro Client Server Messaging Security for SMB dramatically simplifies security management for businesses who demand a worry-free approach.



For example, Automatic Threat Protection eliminates the time and costs of manually dealing with viruses, spam and other malicious code. It is like having
a virtual 24/7 security staff. In addition, the complexity and the effort necessary to protect your business from multiple Internet threats are reduced by an all-in-one Integrated Defense. Finally, Zero Administration relieves users of managing
security solutions so they can stay focused on their business.



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InterScan VirusWall for SMB



Trend Micro InterScan VirusWall for Small and Medium Business, the most comprehensive gateway antivirus, anti-spam and
content filtering solution of its kind, protects against malicious threats at the gateway before they reach the interior of your network. Designed for growing companies, it filters Internet email and Web traffic to ensure that content is free of
viruses and spam. While most of competing products need to be managed separately, InterScan VirusWall for Small and Medium Business features a single point of management with an intuitive interface that facilitates administration and lowers the
total lifetime cost of your security strategy.



InterScan
VirusWall for Small and Medium Business provides a high degree of protection at the gateway, featuring in-depth scans of SMTP, HTTP, and FTP streams. Furthermore, it also checks POP3 traffic helping to ensure that networks are protected even when
employees access their Internet email accounts. Integrated anti-spam and email content filtering also help maintain productivity and ensure the appropriate use of Internet resources.



NeatSuite for SMB



NeatSuite for Small and Medium Businesses, a comprehensive security suite, delivers enterprise-caliber antivirus, content security and anti-spam
technologies in a single purpose-built package. This powerful solution set empowers business owners to deploy and manage an effective end-to-end antivirus and anti-spam strategy with limited IT investment. NeatSuite for Small and Medium Businesses
minimizes the Internet threats that can infiltrate via open communication channels necessary to do businessEmail (SMTP, POP3), Web access (HTTP), and File download (FTP). Leveraging Trend Micros industry-pioneering technology, NeatSuite
for Small and Medium Businesses offers complete gateway, e-mail, server and PC protection in one, easy to manage package. Its single point of management and intuitive interface facilitates easy installation, configuration, and administration thus
reducing the total cost of ownership.



Services and
Support



We provide several industry-unique services
that complement our products, including information deployment and attack-specific policies and cleaning templates that help minimize the impact of network viruses, network vulnerabilities, and mixed-threat attacks. We offer a range of services,
backed by timely knowledge and expertise from TrendLabs, including Trend Micro Vulnerability Assessment, Trend Micro Outbreak Prevention Services, Virus Response Services, and Trend Micro Damage Cleanup Services, to help customers manage all phases
of the virus outbreak lifecycle.



Virus Response Service Level
Agreement guarantees customers that fully tested virus pattern files will be delivered within two hours from the time a virus case is submitted. If we fail, however, based on the terms of the agreement entered into with the customer, we may make a
penalty payment which may amount up to 100% of the initial sale price.



Premium Support Program provides customers with timely assistance that combines rapid response times with technical and computer security expertise to quickly address customer issues. A wide range of service plan options are offered that
provide varying levels of personalized customer service from enhanced online support to dedicated on-site support.



Our products are backed by TrendLabs, a global network of antivirus research and support centers with an ISO9001:2000 and BS7799. Staffs in a head center
of TrendLabs are more than 700 including engineers and antivirus specialists operate around the clock to monitor virus activity, develop information on new threats, and deliver prompt, effective services designed to deal with specific threats.



Seasonality



Our quarterly net sales are subject to seasonal fluctuations. For example,
net sales of corporate products in Japan may be lower in the quarters ending June and December, and higher in the quarters ending March and September, while net sales of consumer products in Japan may be higher in the quarter ending December. Net
sales of corporate products in the United States and Europe may be lower in the quarter ending March and higher in the quarter ending December.



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SALES AND MARKETING



Our products are generally sold to corporate customers on a per-user license basis through our channel partners which include systems integrators,
distributors, and value-added resellers, with the remaining portion consisting largely of package software sales through channel partners and our online Web stores. We view our channel partnerships as key to our success. Our support programs, such
as training and certification programs for our products, help cultivate relationships with our channel partners. Channel partners are integral to increasing the brand recognition and visibility of Trend Micro products and services in the network
antivirus and Internet content security market.



In our
marketing strategy, Trend Micro Enterprise Protection Strategy plays a central role. By emphasizing this industry-unique approach through media and industry analyst community, interest for Trend Micro products and services is generated at the
customer level primarily through our channel partners as well as through our global Web sites, corporate alliances, advertising in trade and business publications, customer references, direct marketing campaigns, and trade shows and events
worldwide. Furthermore, an extensive and expertise-driven service and support organization contribute to customer loyalty. Current marketing efforts are targeted at a combination of large enterprise, small and medium businesses, as well as consumer
and broadband customers.



Regional Overview



Japan



Overview. We sell our products in Japan to both corporate and
individual end users primarily through systems integrators and distributors, and conduct a limited amount of direct sales to end users, including online sales through a resellers website. Our net sales in Japan accounted for approximately 40%
of our net sales or (Yen)29.4 billion in 2005, approximately 41% of our net sales or (Yen)25.4 billion in 2004 and approximately 42% or (Yen)20.1 billion in 2003.



Distribution Through Systems Integrators and Distributors. Virtually all sales to Japanese corporate users are made
through systems integrators. In Japan, systems integrators play a large role in delivering management information services, providing primary computer support services such as installation, systems integration, upgrades, and maintenance.



Relationship with SOFTBANK. Since 1996, we have entered into
numerous agreements with SOFTBANK in connection with the distribution of our products in Japan by SOFTBANK. Currently, all distribution by SOFTBANK of our products in Japan is covered by an October 1999 distribution agreement with SOFTBANK BB, an
indirect wholly-owned subsidiary of SOFTBANK. This distribution agreement gives SOFTBANK BB the non-exclusive right in Japan to distribute all of our products. It is automatically renewable for successive one-year terms, unless either party
exercises its right of non-renewal by giving prior written notice. The October 1999 distribution agreement supersedes all prior agreements between SOFTBANK and us relating to distribution of our products. We make rebate payments to SOFTBANK based on
SOFTBANKs achievement of sales targets agreed upon between SOFTBANK and us.



Historically, a significant percentage of our Japan net sales have been sales to SOFTBANK. For example, sales to SOFTBANK BB totaled approximately (Yen)9.2 billion or 19.1% of net sales in 2003, (Yen)10.4 billion or
16.8% of net sales in 2004 and (Yen)10.6 billion or 14.5% of net sales in 2005. The majority of sales to SOFTBANK BB in 2003, 2004 and 2005 consisted of SOFTBANK BBs sales of our products to systems integrators.



Service Provider and Other Relationships. We contracted with Nifty,
NTT-Communications, and Internet Initiative Japan to license InterScan VirusWall technology to them which enables them to provide virus scanning service to their subscribers. We entered into agreements with SECOM Trust net, Hitachi Software
Engineering and Otsuka Shokai which allow them to provide antivirus outsourcing service to their customers.



North America



Overview. Our North American region includes the United States and Canada, with headquarters in Cupertino, California. Products are sold through
distributors, value-added resellers and managed service providers. Our North America net sales accounted for approximately 21% of our net sales or (Yen)15.4 billion in 2005, approximately 19% of our net sales or (Yen)11.9 billion in 2004 and
approximately 20% or (Yen)9.6 billion in 2003.



Distributors. The majority of our North American revenue is from sales of site licenses to corporate users and consumer products to home users. Principal distributors in the U.S. include Ingram Micro, Interwork Technologies, Navarre,
Synnex and Techdata. In Canada, principal distributors include Interwork Technologies Canada, Ingram Micro Canada, Synnex Canada, and Tech Data Canada.



Our customers in the United States include the U.S. federal and state government agencies, educational institutions, large corporations from all
industries, and small and medium sized businesses. A majority of the contracts were comprised of Internet gateway, e-mail and groupware products and client server products as described above.



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Europe, the Middle East and Africa



Overview. We are represented throughout Europe, the Middle East and
Africa (EMEA), with offices in Germany, France, Italy, Spain, U.K., Norway, Sweden, the Netherlands, Belgium, Poland and United Arab Emirates. Our European Support Center, which is located in Munich, Germany and Cork, Ireland, offers real-time
technical support and antivirus expertise to our channel partners throughout Europe. Our EMEA net sales accounted for approximately 25% of our net sales or (Yen)18.4 billion in 2005, approximately 26% of our net sales or (Yen)16.4 billion in 2004
and approximately 25% or (Yen)12.1 billion in 2003.



Distributors. The majority of European revenues are from sales of site licenses to corporate users. Principal distributors for the EMEA region include: Belgium/Luxembourg/ Netherlands: NOXS, Intechnology Plc, Logix Plc and Tech Data.
Middle East/Africa: SecureData, Online Distribution and Hilan Tech. France: Cris Reseaux, IP Vista, Noxs France, ComputerLinks, Avanquest France, InfoManage (Switzerland) and Config (North Africa). Germany: ComputerLinks AG, Entrada Kommunikations
GmbH, Client Server EDV und Elektronic GmBH, Ingram Micro Distribution GmbH and Tech Data Midrange GmbH. Italy: IT Way SPA, ComputerLinks, Esprinet SPA and J.Soft Distribuzione SPA. Nordic Region: Network Technologies A/S (Denmark), Securesoft AB
(Sweden), Scribona AS (Norway), Scribona Nordic AB (Sweden), Itegra AS (Norway), Securesoft Norway (AS) and Securesoft OY (Finland). Spain: AFINA, Itway Iberica SL and Diode. UK: e92plus Ltd, Sphinx and Unipalm.



Our customers in EMEA include various government departments, educational
institutions, large corporations and small and medium sized businesses. A majority of the contracts include Internet gateway, email server, and client server products as described above.



Asia Pacific



Overview. We are represented throughout the Asia Pacific region (excluding Japan), with offices in Taiwan, Hong Kong, China, Singapore, Malaysia,
Thailand, Indonesia, India, Korea, Australia, and New Zealand. Trend Micros ISO9001:2000 and BS7799 standards-certified headquarters for TrendLabs, our global product support and antivirus research center, is located in Manila, the
Philippines; this facility and others like it provide continuous 24 hours-a-day, seven-days-a week coverage to our customers around the world. Our Asia Pacific net sales accounted for approximately 11% of our net sales or (Yen)7.9 billion in 2005,
approximately 10% of our net sales or (Yen)6.3 billion in 2004 and approximately 10% or (Yen)4.8 billion in 2003.



Distributors. The majority of Asia Pacific revenue is from sales of site licenses to corporate users and consumer products to home users. Principal
distributors in Asia Pacific include: Taiwan: TWP, UCOM and Jetwell Computer. Hong Kong: Datalink, SIS, and Digital China. China: Digital China, Dawncom Business Technology and Service and Secure China Global Communication. South Asia: Ingram Micro,
ACA Pacific, ECS Computer, Select Technologies. Korea: Daou System, Intercom Software and Sun Tek. Australia: Alstom IT, Ingram Micro, and Channelworx. New Zealand: Lan One and Soft Solutions.



Our customers in Asia Pacific include local government departments and
agencies and large corporations from various industry sectors like commercial banking, telecommunications, Internet service providers, and other service providers over the Internet and securities firms. A majority of the contracts include the
purchase of Internet gateway, client PC, and server products as described above.



Latin America



Overview. Our Latin America Region (LAR) includes the countries located in South America, Central America, the Caribbean, as well as Mexico. Trend Micro has established offices in Mexico and Brazil. Products are sold through a
network of distributors and resellers.



Our Latin America net
sales accounted for approximately 3% of our net sales or (Yen)1.9 billion in 2005, approximately 3% of our net sales or (Yen)2.0 billion in 2004 and approximately 3% or (Yen)1.5 billion in 2003.



Distributors. The majority of Latin American revenue comes from
software licenses. Principal resellers in the region are Edsi in Argentina, Antivirus expertos and Dicofra in Mexico, Ciberlynx, F9C and security web in Brazil, among others.



Latin Americas region revenue comes mainly from midsize and large enterprise markets, our customers in the Latin
includes several midsize commerce enterprises, government agencies, and large corporations from commercial banking, energy, securities and telecommunication sectors.



- 21 -



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OPERATIONS



In Japan, we outsource assembly, packaging and shipping of all of our anti-virus software products to value-added resellers. Our Taiwanese subsidiary and,
in some cases, third-party service providers assemble, package, and ship products to be sold in the United States, Europe, and Asia other than Japan. Software products are generally shipped within seven days of receipt of an order and hardware
products are generally shipped within ten days. Accordingly, there is some minimal order backlog at all times.



LEGAL PROCEEDINGS



On
March 3, 2006, a complaint entitled Deutsche Telecom AG versus Trend Micro Incorporated and Trend Micro Deutschland GmbH was filed in the Regional Court of Hamburg, Germany. The lawsuit alleges trademark violations in connection with
Trend Micros use of a t-ball device in the European Union (EU). The complaint seeks to enjoin Trend Micros standalone use of the t-ball device in the EM and an unspecified amount of damages.



We are involved in normal claims and other legal proceedings in the ordinary
course of business, and are not involved in any litigation or other legal proceedings which, if determined adversely to us, would individually or in the aggregate have a material adverse effect on us or our operations.



C. Organizational Structure.



We are not, directly or indirectly, owned or controlled by other
corporations or by the Japanese government or any foreign government. The following table lists our consolidated subsidiaries as of April 30, 2006.



|                                        |  |                          |  |                                                   |  
|--------------------------------------- |  | ------------------------ |  | ------------------------------------------------- | -
|NAME                                    |  | COUNTRY OF INCORPORATION |  | EQUITY HELD BY TREND MICRO DIRECTLY OR INDIRECTLY |  
|Trend Micro Incorporated                |  | Taiwan                   |  | 100                                               | %
|                                        |  |                         
|Trend Micro Inc.                        |  | USA                      |  | 100                                               | %
|                                        |  |                         
|Trend Micro Korea Inc.                  |  | Korea                    |  | 99                                                | %
|                                        |  |                         
|Trend Micro Italy S.r.l.                |  | Italy                    |  | 100                                               | %
|                                        |  |                         
|Trend Micro Deutschland GmbH            |  | Germany                  |  | 100                                               | %
|                                        |  |                         
|Trend Micro Australia Pty. Ltd.         |  | Australia                |  | 100                                               | %
|                                        |  |                         
|Trend Micro do Brasil Ltda.             |  | Brazil                   |  | 99                                                | %
|                                        |  |                         
|Trend Micro France SA                   |  | France                   |  | 99                                                | %
|                                        |  |                         
|Trend Micro Hong Kong Limited           |  | China                    |  | 100                                               | %
|                                        |  |                         
|Trend Micro Latinoamerica S.A. de C.V.  |  | Mexico                   |  | 100                                               | %
|                                        |  |                         
|Trend Micro (UK) Limited                |  | UK                       |  | 100                                               | %
|                                        |  |                         
|Trend Micro (China) Incorporated        |  | China                    |  | 100                                               | %
|                                        |  |                         
|Servicentro TMLA, S.A. de C.V.          |  | Mexico                   |  | 100                                               | %
|                                        |  |                         
|Trend Micro (EMEA) Limited              |  | Ireland                  |  | 100                                               | %
|                                        |  |                         
|Trend Micro (Singapore) Private Limited |  | Singapore                |  | 100                                               | %
|                                        |  |                         
|Trend Micro (NZ) Limited                |  | NZ                       |  | 100                                               | %
|                                        |  |                         
|Trend Micro Malaysia Sdn. Bhd.          |  | Malaysia                 |  | 99                                                | %
|                                        |  |                         
|Trend Micro (Thailand) Limited          |  | Thailand                 |  | 91                                                | %
|                                        |  |                         
|Trend Micro India Private Limited       |  | India                    |  | 100                                               | %



- 22 -



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D. Property, Plants and Equipment.



Our headquarters is located in Tokyo, Japan, where we lease an aggregate of 3,897 square meters of office space under a
lease contract which expires in April 2007. We also lease an aggregate of approximately 581 square meters of office space in Osaka, Fukuoka, and Nagoya.



We lease an aggregate of approximately 104,195 square feet of office space in Taipei, Taiwan, under a lease which expires in November 2006 for our
regional sales, research and development and sales office. We also lease an aggregate of approximately 63,881 square feet of office space in Manila, Philippines, under a lease which expires in January 2006 and May 2006 for our customer service
center. We also lease approximately 37,492 square feet of office space in Cupertino, California, U.S.A., under a lease which expires in January 2009 for research and development and sales office. We also lease small sales offices in Argentina,
Australia, Benelux, Brazil, China, France, Germany, Hong Kong, India, Italy, Malaysia, Thailand, Mexico, Middle East-Africa, Norway, Singapore, South Korea, Spain and Sweden.



Item 4A. Unresolved Staff Comments



We are a large accelerated filer as defined in Rule 12b-2 under the Securities Exchange Act of 1934. There are no written comments which have been
provided by the staff of the Securities and Exchange Commission regarding our periodic reports under that Act not less than 180 days before the end of the fiscal year ended December 31, 2005 and which remain unresolved as of the date of the
filing of this Form 20-F with the Commission.



Item 5. Operating and
Financial Review and Prospects.



A. Operating Results.



You should read the following discussion together with the financial
statements and notes included in this annual report. Additionally, the following discussion includes forward-looking statements about our business and future performance. These forward-looking statements are based on our current assumptions and
beliefs in light of the information currently available to us, and involve known and unknown risks and uncertainties. You should read these forward-looking statements together with the description of the risks and uncertainties associated with these
statements contained under the headings Cautionary Statement Regarding Forward-Looking Statements immediately following the cover page and under Item 4.D. of this annual report.



RESTATEMENTS



In response to a comment from the staff of the Securities and Exchange Commission, as disclosed in Note 2 to our
consolidated financial statements, we have restated the statements of income for the fiscal year ended December 31, 2003 and 2004 in order to reclassify maintenance costs previously reported as part of the research and development and maintenance
costs within operating expenses and customer support expenses also previously included in operating expenses, into cost of sales. Furthermore, we have restated the pro forma stock compensation disclosures required by FAS 123 as amended by FAS 148
for the fiscal year ended December 31, 2003 and 2004 in order to reflect the corrections in the amortization period, expected life assumptions and volatilities used to determine pro forma stock-based compensation expense.



OVERVIEW



Strategy



We develop, market and support anti-virus software and management solutions for corporate computer systems and desktop personal computers. In the
anti-virus industry there are two U.S. competitors having a higher global market share than we. These companies have strong brand-name recognition and sales forces especially outside Japan because they have longer histories in the industry. They are
also developing businesses supported by management resources larger than ours, including work forces and financial strength. Under such circumstances, we aim for further growth by developing original solutions which respond to the evolution of
computer viruses faster than our competitors by concentrating our management resources, by improving our superiority in products and services with additional improvements in the specifications and performance of our products from the view point of
customers, and by strengthening customers loyalty with our marketing development which is conscious of customer attributes characterized by the differences in purchasing behavior.



- 23 -



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To enhance our competency, we acquired Intermute Inc. which provides anti-spyware technologies and Kelkea
Inc. which provides IP filtering and reputation services in 2005.



While we specialize in the antivirus area, we have formed several alliances with dominant vendors in areas other than antivirus solutions. In 2004, we announced affiliation with Cisco Systems, the worlds largest network equipment
vendor. As a result of the strategic alliance, we have put our antivirus solutions on the market as internal functions of Ciscos routers, switches and security appliance products from 2005. We believe that this sort of strategic alliance plays
an important role in our sales strategy since we expect combined products to be more competitive and our and our partners sales channels to complement each other.



Critical Accounting Estimates



The methods, estimates and judgments we use in applying our accounting policies have a significant impact on the results we report in our financial
statements, which we discuss under Results of Operations below. Some of our accounting policies require us to make difficult and subjective judgments, often as a result of the need to make estimates of matters that are inherently
uncertain. Our most critical accounting estimates include: judgment for revenue recognition which impacts our net sales; estimate of allowance for sales returns and allowance for doubtful accounts, which impacts our sales return provision and
doubtful accounts provision; recognition and measurement of income tax, current and deferred income tax assets and liabilities, which impacts our tax provision; valuation of goodwill and other intangible assets which impacts our goodwill and
impairment loss. We discuss these policies further, as well as the estimates and judgments involved, below.



Revenue Recognition



We account for the licensing of software in accordance with Statement Of Position (SOP) 97-2, Software Revenue Recognition, released by
the American Institute of Certified Public Accountants. The application of SOP 97-2 requires judgment, including whether a software arrangement includes multiple elements, and if so, whether vendor-specific objective evidence (VSOE) of fair value
exists for those elements. End users receive certain elements of our products over a period of time. These elements include post-contract customer support services which includes virus pattern updates, unspecified product version updates, and
telephone and online technical support, the fair value of which is recognized ratably over the service period. We allocate revenue to post-contract customer support services based on the fair value of the post-contract customer support services,
which is determined based on separate renewal sales to customers. Changes to the elements in a software arrangement, the ability to identify VSOE for those elements and the fair value of the respective elements could materially impact the amount of
earned and unearned revenue.



Allowance for Sales Returns
and Allowance for Doubtful Accounts



We primarily sell
retail packages through intermediaries. After sale of a retail package, we may approve certain returns from intermediaries or end-users. Therefore, we must make estimates of potential future product returns related to current period product revenue.
We analyze historical returns, current economic trends, and changes in customer demand and acceptance of our products when evaluating the adequacy of the sales returns. Significant management judgments and estimates must be made and used in
connection with establishing the sales returns in any accounting period. Material differences may result in the amount and timing of our revenue for any period if management made different judgments or utilized different estimates. Similarly, we
must make estimates of the uncollectability of our accounts receivables. We specifically analyze accounts receivable and analyzes historical bad debts, customer concentrations, customer credit-worthiness, current economic trends and changes in our
customer payment terms when evaluating the adequacy of the allowance for doubtful accounts. The balance of allowance for doubtful accounts and sales returns were (Yen)282 million ($2,392 thousand) and (Yen)422 million ($3,580 thousand) as of
December 31, 2005, respectively. Our accounts receivable balance was (Yen)19,199 million ($162,702 thousand), net of allowance for doubtful accounts and sales returns of (Yen)704 million ($5,972 thousand), as of December 31, 2005.



Income Taxes



As part of the process of preparing our consolidated financial statements,
we are required to estimate our income taxes in each of the jurisdictions in which we operate. This process involves our estimating our actual current tax exposure together with assessing temporary differences resulting from differing treatment of
items, such as deferred revenue, for tax and accounting purposes. These differences result in deferred tax assets and liabilities, which are included within our consolidated balance sheet. We must then assess the likelihood that our deferred tax
assets will be recovered from future taxable income. To the extent we believe that recovery is not likely, we must establish a valuation allowance. To the extent we establish a valuation allowance or increase this allowance in a period, we must
include an expense within the tax provision in the statement of operations.



- 24 -



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Significant management judgment is required in determining our provision for income taxes, our deferred
tax assets and liabilities and any valuation allowance recorded against our net deferred tax assets. We have recorded this valuation allowance of (Yen)21 million ($177 thousand) as of December 31, 2005, due to uncertainties related to our
ability to utilize some of our deferred tax assets, primarily consisting of certain net operating losses carried forward. The valuation allowance is based on our estimates of taxable income by jurisdiction in which we operate and the period over
which our deferred tax assets will be recoverable. In the event that actual results differ from these estimates or we adjust these estimates in future periods we may need to establish an additional valuation allowance which could materially impact
our financial position and results of operations.



The net
deferred tax asset as of December 31, 2005 was (Yen)8,761 million ($74,243 thousand), net of a valuation allowance of (Yen)21 million ($177 thousand).



Valuation of Goodwill and other intangible assets



Goodwill is the excess of the purchase price of the acquired business over the fair value of its net tangible and identifiable intangible assets. Other
intangible assets consist primarily of existing technology purchased by business acquisition. In determining the purchase price of acquired business and existing technology, management is required to make significant estimates of the fair values of
assets acquired and liabilities assumed, especially with respect intangible assets. These estimates are based on the information obtained from the management of the acquired companies to and include the cash flows that an asset is expected to
generate in the future, the weighted average cost of capital, and cost savings expected to be derived from acquiring asset. These estimates are inherently uncertain and unpredictable.



The balance of goodwill and existing technology were (Yen)2,130 million ($18,053 thousand) and (Yen)615 million ($5,212
thousand) as of December 31, 2005, respectively. We assess the impairment of goodwill annually, or more often if events or changes in circumstances indicate that the carrying value may not be recoverable. We assess the impairment of other
intangible assets whenever events or changes in circumstances indicate that its carrying amount may not be recoverable. An impairment loss would be recognized when the sum of the future net cash flows expected to result from the use of the asset and
its eventual disposition is less than its carrying amount. Such impairment loss would be measured as the difference between the carrying amount of the assets and its fair value. The estimate of cash flow is based on, among other things, certain
assumptions about expected future operating performance and an appropriate discount rate determined by our management. Our estimates of discounted cash flows may differ from actual cash flows due to economic conditions, changes to the business
model, or changes in operating performance. If management made different estimates, material differences may result in write-downs of goodwill and intangible assets, which would be reflected by charges to our operating results for any period
presented.



EFFECT ON OUR RESULTS OF OPERATIONS FROM DISTRIBUTION OF A
DEFECTIVE VIRUS PATTERN FILE IN APRIL 2005



As described
under in Item 4.B.- Distribution of a Defective Virus Pattern File in April 2005, we distributed a defective virus file pattern that resulted in damage to the computers of our customers who downloaded the file. As described in
Item 4.B., we took steps to resolve our customers problems and ensure that a similar problem would not recur. We have incurred (Yen) 991 million ($8,398 thousand) related to this issue for the year ended December 31, 2005 as
cost of sales and operating expenses. There is some possibility of incurring further cost, however Management expects additional cost will be insignificant.



RESULTS OF OPERATIONS



Our consolidated financial statements are denominated in Japanese yen. All asset and liability accounts of our foreign subsidiaries are translated into
Japanese yen at the year-end rates of exchange. We translate all income and expense accounts at rates of exchange that approximate those prevailing at the time of the transactions and accumulate the resulting adjustments as a separate component of
shareholders equity. We translate foreign currency-denominated receivables and payables into Japanese yen at year-end rates of exchange and recognize or expense the resulting translation gains or losses on a current basis. Fluctuations in the
exchange rate between the Japanese yen and other currencies, principally the U.S. dollar, Euro and the New Taiwan dollar, will affect the translation of the financial results of our foreign subsidiaries into Japanese yen for purposes of our
consolidated financial results, and will also affect the Japanese yen value of any amounts we receive from our subsidiaries.



- 25 -



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The following table sets forth certain consolidated statements of income data as a percentage of net
sales for the periods indicated:



|                                                    |  |                          |   |  |               |   |  |       |  
|--------------------------------------------------- |  | ------------------------ | - |  | ------------- | - |  | ----- | -
|                                                    |  | Years ended December 31, |  
|                                                    |  | 2003                     |   |  | 2004          |   |  | 2005  |  
|                                                    |  | (Restated)(1)            |   |  | (Restated)(1) |   |  |       |  
|Net sales                                           |  | 100.0                    | % |  | 100.0         | % |  | 100.0 | %
|Cost of sales                                       |  |                          |   |  |               |   |  |       |  
|Amortization of capitalized software, and Materials |  | 6.6                      | % |  | 5.2           | % |  | 3.5   | %
|Maintenance                                         |  | 4.6                      | % |  | 3.7           | % |  | 2.3   | %
|Customer support                                    |  | 10.0                     | % |  | 9.2           | % |  | 9.4   | %
|                                                    |  |                          |   |  |               |   |  |       |  
|Total Cost of sales                                 |  | 21.2                     | % |  | 18.1          | % |  | 15.2  | %
|                                                    |  |                          |   |  |               |   |  |       |  
|Operating expenses:                                 |  |                          |   |  |               |   |  |       |  
|Selling                                             |  | 31.9                     | % |  | 25.8          | % |  | 28.7  | %
|Research and development                            |  | 3.6                      | % |  | 4.2           | % |  | 6.0   | %
|General and administrative                          |  | 11.8                     | % |  | 9.9           | % |  | 12.3  | %
|                                                    |  |                          |   |  |               |   |  |       |  
|Total operating expenses                            |  | 47.3                     | % |  | 39.9          | % |  | 47.0  | %
|                                                    |  |                          |   |  |               |   |  |       |  
|Operating income                                    |  | 31.5                     | % |  | 42.0          | % |  | 37.8  | %
|                                                    |  |                          |   |  |               |   |  |       |  



| | (1) | See Note 2 (1) to the consolidated financial statements.
| | --- | --------------------------------------------------------



Our Revenue Structure



Our revenue is derived primarily from product revenue, which includes software product license and post-contract customer support (PCS) services. Product
revenue includes limited sales of our products to other companies for inclusion in their products. Revenue from our post-contract customer support services, which includes virus pattern updates, product version updates, telephone and online
technical support, is deferred and recognized ratably over the service period. We allocate revenue to post-contract customer support services based on the fair value of the post-contract customer support services, which are determined based on
separate sales of renewals to customers. Upon expiration of the initial term, corporate end users can renew the post-contract customer support services annually by paying a fee generally equal to one-half of the initial license fee in Japan and
between 20% and 50% of the initial license fee in the United States and elsewhere, depending on the country. For retail purchasers of PC-cillin/Virus Buster, the license fee includes post-contract customer support services for the initial one-year
term only. In order to receive post-contract customer support services after the initial term, these retail purchasers must pay a percentage, generally less than one-half, of the original license fee.



We generally recognize revenues from software product licenses when:



| |  |  | persuasive evidence of an arrangement exists;
| | - |  | ---------------------------------------------



| |  |  | the product has been delivered;
| | - |  | -------------------------------



| |  |  | the fee is fixed and determinable; and
| | - |  | --------------------------------------



| |  |  | collection of the resulting receivable is reasonably assured.
| | - |  | -------------------------------------------------------------



In general, we record sales revenues attributable to post-contract customer support services as deferred revenue and recognize such revenues ratably over
the license term. The percentage of the license fee which is deferred varies depending on the location of the Trend Micro entity making the sale, as well as the product sold.



In our operations, maintenance costs and customer support expenses, which were previously included in operating expenses,
are disclosed as cost of sales from the year ended December 31, 2005 and prior year figures have been reclassified. Thus, there are three lines under cost of sales; Amortization of capitalized software and Materials, Maintenance and Customer
support. Amortization of capitalized software and Materials consists of outbound shipping and handling costs, costs of producing manuals and packaging, and amortization of software development costs. Maintenance costs represent the costs incurred
for not only simple program-bug-fixing but also minor version-ups in the product sustain stage of out anti-virus software product development cycle. Customer support costs represent the costs incurred in connection with Virus Pattern File
development and update activities as along with other customer support activities such as trouble shooting, emerging virus information gathering and product defect information gathering.



We operate our business in five geographic regions: Japan, Europe, North America, Asia Pacific and Latin America. Japan
accounted for around 40% and, together with Europe and North America, over 80% of our net sales for each of our last three fiscal years.



- 26 -



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Sales by Product and Service



The following table sets forth net sales by products and services for the periods indicated:



|                    |  |                                                                        |        |  |      |   |  |       |        |  |                       |   |  |       |        |  |   |         |  |     |   |  |     |   |  |     |  
|------------------- |  | ---------------------------------------------------------------------- | ------ |  | ---- | - |  | ----- | ------ |  | --------------------- | - |  | ----- | ------ |  | - | ------- |  | --- | - |  | --- | - |  | --- | -
|                    |  | 2003                                                                   |        |  | 2004 |   |  | 2005  |        |  | Year over Year Growth |  
|                    |  | (in millions of yen and thousands of U.S. dollars, except percentages) |        |  | 2004 |   |  | 2005  |       
|Server based        |  | (Yen)                                                                  | 3,633  |  | 8    | % |  | (Yen) | 3,310  |  | 5                     | % |  | (Yen) | 3,279  |  | $ | 27,784  |  | 4   | % |  | -9  | % |  | -1  | %
|Personal Computer   |  |                                                                        | 13,507 |  | 28   | % |  |       | 16,890 |  | 27                    | % |  |       | 19,714 |  |   | 167,072 |  | 27  | % |  | 25  | % |  | 17  | %
|Retail sales        |  |                                                                        | 8,141  |  | 17   | % |  |       | 12,384 |  | 20                    | % |  |       | 15,346 |  |   | 130,053 |  | 21  | % |  | 52  | % |  | 24  | %
|Site license sales  |  |                                                                        | 5,366  |  | 11   | % |  |       | 4,506  |  | 7                     | % |  |       | 4,368  |  |   | 37,019  |  | 6   | % |  | -16 | % |  | -3  | %
|Internet based      |  |                                                                        | 10,752 |  | 22   | % |  |       | 16,647 |  | 27                    | % |  |       | 18,374 |  |   | 155,710 |  | 25  | % |  | 55  | % |  | 10  | %
|All Suite products  |  |                                                                        | 9,914  |  | 21   | % |  |       | 18,597 |  | 30                    | % |  |       | 24,485 |  |   | 207,500 |  | 34  | % |  | 88  | % |  | 32  | %
|PCS*1 and Royalties |  |                                                                        | 9,215  |  | 19   | % |  |       | 4,714  |  | 8                     | % |  |       | 3,683  |  |   | 31,214  |  | 5   | % |  | -49 | % |  | -22 | %
|Other               |  |                                                                        | 1,067  |  | 2    | % |  |       | 1,891  |  | 3                     | % |  |       | 3,495  |  |   | 29,617  |  | 5   | % |  | 77  | % |  | 85  | %
|                    |  |                                                                        |        |  |      |   |  |       |        |  |                       |   |  |       |        |  |   |         |  |     |   |  |     |   |  |     |  
|                    |  | (Yen)                                                                  | 48,088 |  | 100  | % |  | (Yen) | 62,049 |  | 100                   | % |  | (Yen) | 73,030 |  | $ | 618,897 |  | 100 | % |  | 29  | % |  | 18  | %
|                    |  |                                                                        |        |  |      |   |  |       |        |  |                       |   |  |       |        |  |   |         |  |     |   |  |     |   |  |     |  

---

|* | Post contract customer support fees
|- | ------------------------------------



All Suite products were included in another products until 2004, however for the amounts importance, all Suite products are separately disclosed from
2005. In addition, prior figures have been reclassified.



Net
sales of Server based products in 2005 decreased 1% compared with 2004 by decreased sales of Trend Micro ServerProtect. This decrease is due to the increase of the conversion to Suite products.



Within the personal computer product category, net sales of anti-virus
software, including retail package sales of Trend Micro PC-cillin/Virus Buster series, increased from approximately (Yen)16,890 million in 2004 to approximately (Yen)19,714 million ($167,072 thousand) in 2005. Retail package sales of personal
computer software increased due primarily to increased sales of our products, including the Virus Buster 2006 which we released in November 2005, in the Japanese market.



Net sales of internet-based products in 2005 increased 10% from 2004, reflecting mainly increased sales of InterScan Web
Security Suite and InterScan Messaging Security Suite products in 2005 compared with 2004.



Net sales of All Suite products in 2005 increased 32% from 2004, reflecting mainly sales of Client/Server Suite products in 2005 compared with 2004.



Net sales of post-contract customer support fees and royalties in 2005 decreased 22% from 2004 due primarily to
reclassification of the products into other revenue categories. If net sales of post-contract customer support fees and royalties in 2004 had been categorized as that in 2005 as mentioned above, this line item would have increased 71% in 2005
compared with 2004.



- 27 -



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Net sales of post-contract customer support fees and royalties in 2004 decreased 49% from 2003. Until
2003, the renewal sales were categorized as post-contract customer support fees and royalties in the United Sates, because their accounting system could not separate the renewal sales amount by product. Because of the improvement of the system, the
renewal sales amount can now be categorized by product. For descriptive purpose to compare 2004 to 2003, if such renewal sales amount had been categorized as post-contract customer support fees and royalties in 2004 in the United States, this line
item would have increased 6.2% in 2004 compared with 2003.



Net
sales in 2004 increased 29% compared with 2003. The increase was due primarily to increased sales of All Suite products such as NeaTSuite or Client/Server Suite.



Net sales of internet-based products in 2004 increased 55% from 2003, reflecting mainly increased sales of InterScan
products in 2004 compared with 2003. If renewal sales amount had been categorized as post-contract customer support fees and royalties in 2004 in the United States as mentioned above, this line item would have increased 38% in 2004 compared with
2003.



Net sales of Server based products in 2004 decreased 9%
compared with 2003 by decreased sales of Trend Micro ServerProtect. This decrease is due to the increase of the conversion to Suite products. If renewal sales amount had been categorized as post-contract customer support fees and royalties in 2004
in the United States as mentioned above, this line item would have decreased 13% in 2004 compared with 2003.



Within the personal computer product category, net sales of anti-virus software, including retail package sales of Trend Micro PC-cillin/Virus Buster
series, increased from approximately (Yen) 13,507 million in 2003 to approximately (Yen) 16,890 million in 2004. Retail package sales of personal computer software increased due primarily to increased sales of our products, including the
Virus Buster 2005 which we released in October 2004, in the Japanese market. If renewal sales amount had been categorized as post-contract customer support fees and royalties in 2004 in the United States as mentioned above, this line item would have
decreased 23% in 2004 compared with 2003.



Cost of sales



Cost of sales for the three years ended December 31, 2005 were as
follows:



|                                                    |  |                          |        |                          |       |        |  |       |        |  |   |       
|--------------------------------------------------- |  | ------------------------ | ------ | ------------------------ | ----- | ------ |  | ----- | ------ |  | - | ------
|                                                    |  | Years ended December 31,
|                                                    |  | 2003                     |        | 2004                     |       | 2005   |  | 2005 
|                                                    |  | (restated)(1)            |        | (restated)(1)            |       |        |  |      
|                                                    |  | Millions of yen          |        | Thousands ofU.S. dollars
|Cost of sales:                                      |  |                          |        |                          |       |        |  |       |        |  |   |       
|Amortization of capitalized software, and Materials |  | (Yen)                    | 3,168  |                          | (Yen) | 3,236  |  | (Yen) | 2,599  |  | $ | 22,022
|Maintenance                                         |  |                          | 2,194  |                          |       | 2,261  |  |       | 1,671  |  |   | 14,163
|Customer Support                                    |  |                          | 4,831  |                          |       | 5,724  |  |       | 6,858  |  |   | 58,118
|                                                    |  |                          |        |                          |       |        |  |       |        |  |   |       
|Total Cost of sales                                 |  | (Yen)                    | 10,193 |                          | (Yen) | 11,221 |  | (Yen) | 11,128 |  | $ | 94,303
|                                                    |  |                          |        |                          |       |        |  |       |        |  |   |       



| | (1) | See Note 2 (1) to the consolidated financial statements.
| | --- | --------------------------------------------------------



Amortization of capitalized software, and Material Costs



Amortization of capitalized software and Material cost consist primarily of amortization of the capitalized software for sales and purchase of
products. Amortization of capitalized software, and Material costs decreased (Yen)637 million, or -20%, in 2005 compared with 2004, and increased (Yen) 68 million, or 2%, in 2004 compared with 2003.



Maintenance Expenses



Maintenance expenses consist primarily of payroll and related expenses for
software engineers who update our anti-virus software products. Maintenance expenses decreased (Yen) 590 million, or -26%, in 2005 compared with 2004, and increased (Yen) 67 million, or 3%, in 2004 compared with 2003. Maintenance costs are
the costs related to product version updates to enable our customers to cope with newly prevailing computer viruses and bug fixing and are expensed as incurred.



The number of employees at our maintenance department was 108 as of December 31, 2003, 114 as of December 31, 2004, and 130 as of
December 31, 2005.



- 28 -



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Customer Support Expenses



Customer support expenses consist primarily of payroll, related expenses and outsourced customer service fees. Customer
support expenses increased (Yen) 1,134 million, or 20%, in 2005 compared with 2004, and increased (Yen) 893 million, or 18%, in 2004 compared with 2003.



Compared to 2004, the number of employees in our customer support department increased by 98 in Asia Pacific. It is due to
an expansion of the customer support centers in the Philippines to meet the satisfaction of our global customers. The expansion was for enterprise products such as outbreak prevention services and damage cleanup services based on the Trend Micro
Enterprise Strategy described Item 4.B of this annual report, and the recent expansion of the services provided to customers by our customer support department. Additionally, due to the trouble caused by the virus pattern file we distributed on
April 23, 2005, it also includes costs to assist for reconstruction and to settle the problem for our customers.



Operating Expenses



Operating expenses for the three years ended December 31, 2005 were as follows:



|                           |  |                          |        |                          |       |        |  |       |        |  |   |        
|-------------------------- |  | ------------------------ | ------ | ------------------------ | ----- | ------ |  | ----- | ------ |  | - | -------
|                           |  | Years ended December 31,
|                           |  | 2003                     |        | 2004                     |       | 2005   |  | 2005 
|                           |  | (restated)(1)            |        | (restated)(1)            |       |        |  |      
|                           |  | Millions of yen          |        | Thousands ofU.S. dollars
|Operating expenses:        |  |                          |        |                          |       |        |  |       |        |  |   |        
|Selling                    |  | (Yen)                    | 15,360 |                          | (Yen) | 16,009 |  | (Yen) | 20,944 |  | $ | 177,496
|Research and development   |  |                          | 1,725  |                          |       | 2,597  |  |       | 4,395  |  |   | 37,247 
|General and administrative |  |                          | 5,656  |                          |       | 6,144  |  |       | 8,991  |  |   | 76,192 
|                           |  |                          |        |                          |       |        |  |       |        |  |   |        
|Total operating expenses   |  | (Yen)                    | 22,741 |                          | (Yen) | 24,750 |  | (Yen) | 34,330 |  | $ | 290,935
|                           |  |                          |        |                          |       |        |  |       |        |  |   |        



| | (1) | See Note 2 (1) to the consolidated financial statements.
| | --- | --------------------------------------------------------



Selling Expenses



Selling expenses consist primarily of advertising, selling commissions, payroll and related expenses of sales and marketing department. Selling expenses
increased (Yen)4,935 million, or 31%, in 2005 compared with 2004, and increased (Yen) 649 million, or 4%, in 2004 compared with 2003.



The increase in 2005 compared with 2004 was due primarily to the increase in the number of employees in the sales and marketing department. Additionally,
due to the trouble caused by the virus pattern file we distributed on April 23, 2005, it also includes costs to assist for reconstruction and to settle the problem for our customers.



The increase in 2004 compared with 2003 was due primarily to the increase in the number of employees in the sales and
marketing department. Additionally, in 2004, there was an increase in sales promotions over 2003. Channel development activity was stepped up in 2004 particularly in the United States and Europe. This activity is mainly focused on
seminars to boost the channel sales. And in 2004, we conducted major marketing activities in Japan to boost the sales of Virus Buster 2005, which we released in the fourth quarter of the year.



Research and Development Expenses



Research and development expenses consist primarily of payroll and related
expenses for software engineers who develop our anti-virus software products. Research and development expenses increased (Yen)1,798 million, or 69%, in 2005 compared with 2004, and increased (Yen) 872 million, or 51%, in 2004 compared with
2003. All costs relating to research and development to establish the technological feasibility of our software products are expensed as incurred. In our software development process, technological feasibility is established upon completion of all
significant testing for the original English language version of the product. We produce local language versions of our anti-virus software, such as Japanese and Chinese, from the English language version by adding local language functions.
Localization costs, which include direct labor and overhead costs, are capitalized and amortized over the estimated life of the product in accordance with Statement of Financial Accounting Standards No. 86.



During 2005, we acquired InterMute Inc. which provides anti-spyware
technologies and Kelkea Inc. which provides IP filtering Reputation services, and we were engaged in integration of InterMute and Kelkea acquisition. In addition, we engaged in new appliance development, and we invested in the China and Taiwan
Development Center. These new activities resulted in an increase to both the expense and the number of employees in research and development departments.



- 29 -



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During 2004, we engaged in new research and development projects in network appliances. We engaged in
research and development of new products in conjunction with our relationship with Cisco. We invested in the China Development Center. These new activities resulted in an increase to both the expense and the number of employees in research and
development expenses.



The number of employees at our research
and development department was 368 as of December 31, 2003, 527 as of December 31, 2004, and 670 as of December 31, 2005.



General and Administrative Expenses



General and administrative expenses consist primarily of payroll and related expenses, accounting and administration and other general corporate expenses.
General and administrative expenses increased (Yen) 2,847 million, or 46%, in 2005 compared with 2004, and increased (Yen) 488 million, or 9%, in 2004 compared with 2003.



General and administrative expenses for 2005 increased (Yen) 2,847 million, compared with 2004. The number of employees
at general and administrative department increased 40 in Asia Pacific, compared to 2004. The increase was mainly due to the expansion of the information service function in the Philippines. This accounts for most of the increased number in employees
in the general and administrative department from 421 at December 31, 2004 to 494 at December 31, 2005.



Other income (expenses) and Income taxes



Other income (expenses) and income taxes for the three years ended December 31, 2005 were as follows:



|                                              |  |                          |         |                          |       |         |  |       |         |  |   |         
|--------------------------------------------- |  | ------------------------ | ------- | ------------------------ | ----- | ------- |  | ----- | ------- |  | - | --------
|                                              |  | Years ended December 31,
|                                              |  | 2003                     |         | 2004                     |       | 2005    |  | 2005 
|                                              |  | Millions of yen          |         | Thousandsof U.S. dollars
|Other income (expenses):                      |  |                          |         |                          |       |         |  |       |         |  |   |         
|Interest income                               |  | (Yen)                    | 412     |                          | (Yen) | 451     |  | (Yen) | 837     |  | $ | 7,092   
|Interest expense                              |  |                          | (174)   |                          |       | (88)    |  |       | (4)     |  |   | (31)    
|Gain (Loss) on sales of marketable securities |  |                          | (65)    |                          |       | 101     |  |       | 370     |  |   | 3,138   
|Impairment loss of securities investments     |  |                          | (7)     |                          |       |        |  |       |        |  |   |        
|Foreign exchange gain (loss), net             |  |                          | 120     |                          |       | (183)   |  |       | 327     |  |   | 2,774   
|Other income (expense), net                   |  |                          | (111)   |                          |       | (34)    |  |       | 6       |  |   | 49      
|                                              |  |                          |         |                          |       |         |  |       |         |  |   |         
|Total other income (expenses)                 |  |                          | 175     |                          |       | 247     |  |       | 1,536   |  |   | 13,022  
|                                              |  |                          |         |                          |       |         |  |       |         |  |   |         
|Income taxes:                                 |  |                          |         |                          |       |         |  |       |         |  |   |         
|Current                                       |  |                          | 7,438   |                          |       | 11,894  |  |       | 11,863  |  |   | 100,535 
|Deferred                                      |  |                          | (1,335) |                          |       | (1,391) |  |       | (1,359) |  |   | (11,513)
|                                              |  |                          |         |                          |       |         |  |       |         |  |   |         
|                                              |  | (Yen)                    | 6,103   |                          | (Yen) | 10,503  |  | (Yen) | 10,504  |  | $ | 89,022  
|                                              |  |                          |         |                          |       |         |  |       |         |  |   |         



Other Income
(Expenses)



Interest income in 2003, 2004 and 2005 arose
mainly from our investments in bonds and cash in bank deposits.



Interest expense in 2003, 2004 and 2005 resulted mainly from our bonds with warrants issued to provide stock options to our directors and employees. Interest expense decreased during the period, generally corresponding to the progress of
the redemption of the bonds.



We recognized a gain on sales of
marketable securities in 2005. The gain primarily resulted from the redemption of the bonds, and investment trusts denominated in foreign currencies.



We recognized a gain on sales of marketable securities in 2004. The gain primarily resulted from the redemption of the bonds, and investment trusts
denominated in foreign currencies.



We recognized a loss on
sales of marketable securities in 2003. The loss primarily resulted from the disposition of certain of our investments in bonds in 2003.



- 30 -



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Income Taxes



Our statutory tax rate was 42.1% in 2003 and 2004 and 41.0% in 2005. Our effective tax rate was 39.8% in 2003, 39.9% in 2004
and 36.1% in 2005. A decrease in 2005 compared with 2004 was mainly due to tax credit relating to tax law applied to both parent company and foreign subsidiaries in 2005, which in turn lowered our effective tax rate.



Net deferred tax assets gradually increased from (Yen) 6,701 million in
2003 to (Yen) 7,921 million in 2004 and to (Yen) 8,761 million ($74,243 thousand) in 2005. The main reason this was for an increase of the portion derived from deferred revenue from (Yen) 4,344 million in 2003 to (Yen)
5,638 million in 2004 and to (Yen) 6,742 million ($57,135 thousand) in 2005.



Segment Information



Net sales and operating
income (loss) by segment for each of the three years ended December 31 were as follows:



|              |  |                                                         |        |                      |      |      |       |        |  |      |  |       |        |  |   |     |  |      |  |     |  |    
|------------- |  | ------------------------------------------------------- | ------ | -------------------- | ---- | ---- | ----- | ------ |  | ---- |  | ----- | ------ |  | - | --- |  | ---- |  | --- |  | ---
|              |  | Years ended December 31                                 |        | Year over YearGrowth
|              |  | 2003                                                    |        | 2004                 |      | 2005 |       | 2004   |  | 2005
|              |  | (in millions of yen and US dollars, except percentages) |        |                      |      |     
|Net sales     |  |                                                         |        |                      |      |      |       |        |  |      |  |       |        |  |   |     |  |      |  |     |  |    
|Japan         |  | (Yen)                                                   | 20,052 |                      | 42%  |      | (Yen) | 25,443 |  | 41%  |  | (Yen) | 29,416 |  | $ | 249 |  | 40%  |  | 27% |  | 16%
|North America |  |                                                         | 9,633  |                      | 20%  |      |       | 11,891 |  | 19%  |  |       | 15,417 |  |   | 131 |  | 21%  |  | 23% |  | 30%
|Europe        |  |                                                         | 12,138 |                      | 25%  |      |       | 16,418 |  | 27%  |  |       | 18,379 |  |   | 156 |  | 25%  |  | 35% |  | 12%
|Asia Pacific  |  |                                                         | 4,809  |                      | 10%  |      |       | 6,305  |  | 10%  |  |       | 7,910  |  |   | 67  |  | 11%  |  | 31% |  | 25%
|Latin America |  |                                                         | 1,456  |                      | 3%   |      |       | 1,992  |  | 3%   |  |       | 1,908  |  |   | 16  |  | 3%   |  | 37% |  | -4%
|              |  |                                                         |        |                      |      |      |       |        |  |      |  |       |        |  |   |     |  |      |  |     |  |    
|              |  | (Yen)                                                   | 48,088 |                      | 100% |      | (Yen) | 62,049 |  | 100% |  | (Yen) | 73,030 |  | $ | 619 |  | 100% |  | 29% |  | 18%
|              |  |                                                         |        |                      |      |      |       |        |  |      |  |       |        |  |   |     |  |      |  |     |  |    



|                        |  |                         |          |                         |       |          |                       |       |          |  |      |      |      |  |     |  |     
|----------------------- |  | ----------------------- | -------- | ----------------------- | ----- | -------- | --------------------- | ----- | -------- |  | ---- | ---- | ---- |  | --- |  | ----
|                        |  | Years ended December 31 |          | Year ended December 31, |       |          | Year over Year Growth
|                        |  | 2003                    |          | 2004                    |       | 2005     |                       | 2005  |          |  | 2004 |      | 2005
|                        |  | Millions of yen         |          | Millions ofU.S. dollars |       |          |                       |       |         
|Operating income (loss) |  |                         |          |                         |       |          |                       |       |          |  |      |      |      |  |     |  |     
|Japan                   |  | (Yen)                   | 12,741   |                         | (Yen) | 16,600   |                       | (Yen) | 18,636   |  | $    | 158  |      |  | 30% |  | 12% 
|North America           |  |                         | 6,067    |                         |       | 7,543    |                       |       | 10,484   |  |      | 89   |      |  | 24% |  | 39% 
|Europe                  |  |                         | 5,606    |                         |       | 9,733    |                       |       | 10,331   |  |      | 88   |      |  | 74% |  | 6%  
|Asia Pacific            |  |                         | 858      |                         |       | 1,679    |                       |       | 2,836    |  |      | 24   |      |  | 96% |  | 69% 
|Latin America           |  |                         | 729      |                         |       | 1,282    |                       |       | 1,093    |  |      | 9    |      |  | 76% |  | -15%
|Corporate               |  |                         | (10,847) |                         |       | (10,759) |                       |       | (15,808) |  |      | (134 | )    |  | -1% |  | 47% 
|                        |  |                         |          |                         |       |          |                       |       |          |  |      |      |      |  |     |  |     
|Consolidated Total      |  | (Yen)                   | 15,154   |                         | (Yen) | 26,078   |                       | (Yen) | 27,572   |  | $    | 234  |      |  | 72% |  | 6%  
|                        |  |                         |          |                         |       |          |                       |       |          |  |      |      |      |  |     |  |     



Japan



Net sales in 2005 increased 16% compared with 2004, and net
sales in 2004 increased 27% compared with 2003. The sales from corporate users contributed to an increase in sales growth in year 2005. Especially, the sales of Trend Micro Premium Support (Premium Support Program) which provides
proactive, personalized service and the sales of Network VirusWall which is an outbreak prevention appliance drove the growth in sales from corporate users. Although the revenue of Virus Buster series products experienced
negative growth in the second quarter due to the trouble caused by the virus pattern file we distributed on April 23, 2005, it has been sharply recovered in the fourth quarter. The annual results of the products contributed to a stable growth
in year 2005. The results came from the strong demand of consumers for Virus Buster 2006 released in that quarter. The stronger growth rate in net sales in year 2004 from 2003 was mainly due to strong demand for Virus Buster
series products including Virus Buster 2005 released in the fourth quarter of year 2004.



- 31 -



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The growth rate of operating income was 12%, which was lower than that of net sales in 2005. It is
because of the additional cost incurred for the incident of virus pattern file. Cost of sales/Operating expense for year 2005 and 2004, which were 37% and 35%, respectively, of net sales for those years.



North America



Net sales in 2005 increased 30% compared with 2004 and net sales in 2004
increased 23% compared with 2003. The increase in sales growth for year 2005 was a result of several factors. In the Enterprise market, the company successfully refined both its messaging to the customer and suite of products to better meet
customer-perceived needs. In the Small and Mid-size market, increased sales were a result of growing brand recognition, a greater push by national reseller partners to sell Trend product and more emphasis on proactive sales and support. Finally, in
the Consumer market (where the highest growth was experienced) sales were positively impacted by new relationships with, and sales through, high profile retail channel partners such as Best Buy. Sales in the Consumer market were primarily driven by
PC-cillin sales, which grew 69% in 2005.



During 2005, there
were two acquisitions in the United States. The first was Intermute, of Boston, MA, which brought a complimentary new anti-spyware product to the Trend portfolio. This acquisition also included the talents of approximately 30 employees with
specialization in anti-spyware technologies. The second acquisition was for Kelkea of San Jose, CA. This acquisition was for another complimentary and unique technology in the anti-spam space, which enables service provider partners to block spam at
the gateway. This acquisition included approximately 15 employees specialized in anti-spam technologies.



The growth rate of operating income in 2005 over 2004 (39%) was higher than sales growth due to a slower growth rate in overall expenses. Cost of
sales and operating expenses were incurred at 32% of net sales in 2005 versus 37% in 2004. Cost of sales for 2005 was lower than 2004 due to lower negotiated royalty fees for technologies incorporated into several trend products. The slower growth
rate in operating expenses is attributable to lower and better-targeted marketing expenses and only slight growth of general and administrative expenses, due to increased efficiencies. The cost of sales and operating expense for year 2004 and 2003
increased by approximately (Yen) 782 million due to extended sales force and activities in line with sales growth.



Europe, Middle East and Africa



Net sales in 2005 were (Yen) 18,379 million; this was a 12% increase on the previous year. 2005 saw the launch of 2 major initiatives in Europe, Middle
East and Africa (EMEA)  a local sales reorganization and the global rollout of customer segmentation. The sales reorganization was aimed at categorizing markets according to their level of maturity, focusing Sales teams and marketing programs
on key areas in these markets. The German market represented the largest proportion of EMEA sales in 2005 as it did in 2004. In addition, as was the case in 2004, revenue from the small business market contributed most to overall EMEA sales in 2005.
The small business market also recorded the greatest revenue growth in the region.



Cost of sales and operating expenses in 2005 increased by 20% compared with 2004. Major investments in the sales, marketing and customer segmentation reorganization are reflected in the proportionally
higher operational costs in 2005. Costs of sales increased to reflect the introduction of packaged sales in the small and medium business market. The region recorded an operating income contribution of 56% in 2005
compared with 59% in 2004.



Asia Pacific



Net sales in 2005 increased 25% compared with 2004, and net
sales in 2004 increased 31% compared with 2003. Australia, Southeast Asia and South Asia are the major contributors to this segments net sales growth from 2004 to 2005. The major increase contributed primarily from Neat Suite, Gateway
products, PC-cillin, and the premium support services.



The
growth rate of operating income was higher than that of net sales in 2005.The growth rate of cost of sales and operating expense in 2005 was 10% compared to 2004, lower than 2004s increase of 17% compared with 2003. Cost of sales and
operating expense increased by approximately (Yen) 448 million from (Yen) 4,626 million in 2004 to (Yen) 5,074 million in 2005. Cost of Sales increase is mainly due to an increase in introduction of more new hardware-related product
sales such as NVW2500 and NVW300, whilst increase in operating expense is mainly due to our sales and marketing activities designed to increase demand for our products in the market.



- 32 -



---

Latin America



Net sales in 2005 decreased 4% compared with 2004 due to the review of government businesses; and net sales in 2004
increased 37% compared with 2003. The regional strategy, as half of the sales resources were focused on the Cisco alliance and in pushing new products into the existing customer missing to hearing customer needs. During 2005 almost no effort was
placed in obtaining new customers. Net sales increase in 2004 was due because of the sales of new products or new versions such as Spam Prevention Service, Network VirusWall, and products focusing on small and medium sized business.



Corporate



Operating loss of the Corporate segment in 2005 have increased by (Yen)
5,049 million, or 47% compared with 2004. This balance is a combination of increases in research and development, corporate sales and marketing, corporate support and general and administrative departments, offset by amortization of software
development costs.



Increases in research and development staff
in Taiwan and China, and office expansion of China Development Center caused a majority increase in research and development and maintenance cost, totaling of (Yen) 1,208 million. The initial increase in research and development staff was mainly due
to increase projects in appliance products and new products targeted for different market segments.



Corporate sales and marketing expense in 2005 increased by (Yen) 2,010 million or 82% compared with 2004. These increase primarily include cost
incurred for the increase of sales people, who focus on customer from Consumer/SOHO, Small and Mid-size and Enterprise market. Besides, we have introduced a strategic alliance partner team to work with Cisco on the outbreak prevention solutions.
Also, increase marketing expense on the Small and Mid-size market advertising spending, promotion of the Small and Mid-size market anti-spyware product and product launched.



Corporate support cost in 2005 increased by 33% compared with 2004. This increases include hiring new staff in Philippine to
strengthen our post-sales support for retail customers, premium support services and customer support for Consumer/SOHO, Small and Mid-size and Enterprise market.



General and administrative expenses in 2005 increased by approximately (Yen) 1,719 million or 78% compared with
previous year. It derived mainly from the investment on Information Technology infrastructure and amortization of software, deployment of Customer Relationship Management system and legal cost related to certain patent infringement case. During
2005, we have invested on Customer Relationship Management system to develop a more efficient sales process for the company, and this project will continue in 2006.



Stock Options



In April 2002, we granted warrants to attract and retain key employees. In addition, in February, May and November 2003, in April and October 2004, and in
July and December 2005, the stock options with stock acquisition rights were granted. The warrants granted in 2002 generally commenced vesting one year after the grant date. The stock options with stock acquisition rights granted in 2003, 2004 and
2005 generally commenced or will generally commence vesting 9 months or one year after the grant date. Using methodology under Accounting Principles Board Opinion No. 25, we have not recorded any non-cash compensation expense for the years
ended December 31, 2003, 2004 and 2005. Had such non-cash compensation expense for our warrants and stock options in 2002, 2003, 2004 and 2005 been determined based on the fair value of such warrants or options at the grant dates, as prescribed
by Statement of Financial Accounting Standards No. 123, our pro forma net income and net income per share would have been as follows:



|                                |  |                                                                              |       |               |       |        |  |       |        |  |   |        
|------------------------------- |  | ---------------------------------------------------------------------------- | ----- | ------------- | ----- | ------ |  | ----- | ------ |  | - | -------
|                                |  | Years ended December 31,                                                    
|                                |  | 2003                                                                         |       | 2004          |       | 2005   |  | 2005 
|                                |  | (restated)(1)                                                                |       | (restated)(1) |       |        |  |      
|                                |  | (In millions of yen and in thousands of U.S. dollars, except per share data)
|Pro forma net income            |  | (Yen)                                                                        | 5,583 |               | (Yen) | 12,555 |  | (Yen) | 15,076 |  | $ | 127,761
|Pro forma net income per share: |  |                                                                              |       |               |       |        |  |       |        |  |   |        
|Basic                           |  | (Yen)                                                                        | 42.32 |               | (Yen) | 95.41  |  | (Yen) | 112.93 |  | $ | 0.96   
|Diluted                         |  |                                                                              | 42.22 |               |       | 93.79  |  |       | 111.30 |  |   | 0.94   



| | (1) | See Note 2 (1) to the consolidated financial statements.
| | --- | --------------------------------------------------------



- 33 -



---

Pro forma stock-based compensation expense has been revised to reflect the corrections in the
amortization period, expected life term of the option and volatilities used to determine compensation expense. This correction impacts the pro forma net income and net income per share previously presented for fiscal 2003 and 2004 .



These figures are significantly different than those determined under
Accounting Principles Board Opinion No.25. Those differences result mainly from the current price of the shares and their expected volatility. The impact of the pro forma value of the warrants or options computed under Statement of Financial
Accounting Standards No. 123 has not affected our reported earnings or cash flows. The impact has been measured for disclosure purposes only and is entirely non-cash in nature. See Significant accounting policies and note 14 to the
financial statements in included in this annual report.



Employee Benefit
plans



The parent company has an unfunded retirement allowance plan
covering substantially all of its employees who meet eligibility requirements under such plan, and some subsidiaries have defined benefit / defined contribution pension plans. All of the details are described more fully in Note 14: Employee
benefit plans. The Companys total costs for defined contribution pension plan and defined benefit pension plan in 2005 are (Yen) 130 million and (Yen) 230 million, respectively. The aggregated balance at December 31, 2005
of the Companys projected benefit obligation and plan assets are, (Yen) 1,260 million and (Yen) 168 million, respectively. We believe our risk exposure to variation from estimates made for these plans is immaterial.



Effect of Recent Accounting Pronouncement



In December 2004, the Financial Accounting Standards Board revised Statement of Financial
Accounting Standards (SFAS) No.123 Share-Based Payment This new SFAS No.123 focuses primarily on accounting for transactions in which an entity obtains employee services in share-based payment transactions. This Statement is
effective as of the beginning of the first fiscal year that starts after June 15, 2005. We intend to adopt the provisions on Financial Accounting Standards 123(R) effective January 1, 2006. The Companys pro forma net income and net
income per share for the year ended December 31, 2005 based on the fair values of the stock options with Stock acquisition rights, which were estimated on the date of grant using the Black-Scholes option pricing model in accordance with the
original SFAS No.123, are disclosed in Note 2 (1) Significant accounting policies - Stock-based compensation.



In May 2005, the FASB issued SFAS No. 154 Accounting Changes and Error Corrections. SFAS 154, which replaces APB Opinion No. 20Accounting Changes, and SFAS No. 3 Reporting Accounting Changes in Interim Financial Statements  An Amendment of APB Opinion No. 28, applies to all voluntary changes in accounting principle and
provides guidance on the accounting for and reporting of accounting changes and error corrections. APB 20 previously required that most voluntary changes in accounting principle be recognized by including in net income of the period of change a
cumulative effect of changing to the new accounting principle while SFAS 154 requires retrospective application, or the latest practicable date, for reporting a change in accounting principle and the reporting of a correction of an error. SFAS 154
enhances the consistency of financial information between periods. SFAS 154 is effective for accounting changes made in fiscal years beginning after December 15, 2005.



B. Liquidity and Capital Resources.



Our short-term capital requirements depend on numerous factors, including



| |  | market acceptance of our products,
|- |  | ----------------------------------



| |  | the resources we devote to developing, marketing, selling and supporting our products, and
|- |  | ------------------------------------------------------------------------------------------



| |  | the extent to which we are able to establish relationships with strategic partners in the U.S., Europe and elsewhere.
|- |  | ---------------------------------------------------------------------------------------------------------------------



Our short-term capital resources are mainly derived from net cash provided by
operating activities. We believe that our current cash balance, net cash provided by operating activities and existing credit facilities will be sufficient to meet our working capital and capital expenditure requirements for the next 12 months.



In the medium and long term, we may make acquisitions and
strategic investments in order to grow our business. Insofar as we are not able to satisfy our working capital and capital expenditure requirements, we may seek to raise additional capital through equity or debt financing. However, we cannot be
certain that such funding will be available on commercially reasonable terms, if at all.



- 34 -



---

As of December 31, 2005, we had cash and cash equivalents, time deposits and marketable securities
of approximately (Yen) 83,443 million ($707,146 thousand), up from approximately (Yen) 68,580 million as of December 31, 2004. The increase was primarily due to increased net income and marketable securities. Our marketable securities
consist only of debt securities with high credit ratings and mutual funds which consist of debt securities with high credit ratings in accordance with our investment policy. As of December 31, 2005, we had cash and cash equivalents of
approximately (Yen) 59,613 million ($ 505,191 thousand), which mainly consisted of (Yen) 36,402 million ($ 308,493 thousand) in Japanese yen, (Yen) 5,083 million ($ 43,074 thousand) in U.S. dollar and (Yen) 11,719 million ($
99,312 thousand) in Euro. As of December 31, 2004, we had cash and cash equivalents of approximately (Yen) 52,908 million, which mainly consisted of (Yen) 33,476 million in Japanese yen, (Yen) 4,022 million in U.S. dollars and
(Yen) 10,905 million in Euro.



As of December 31,
2005, we had deferred revenue under both current liabilities and long-term liabilities of approximately (Yen) 35,381 million ($ 299,841 thousand), compared with approximately (Yen) 27,904 million as of December 31, 2004. Deferred
revenue as of each fiscal year end is expected to become net sales in accordance with contractual period in the future. Deferred revenue was derived from each region as shown in the following table:



|                   |  |                 |        |                           |       |        |  |   |        
|------------------ |  | --------------- | ------ | ------------------------- | ----- | ------ |  | - | -------
|                   |  | December 31,    |        | December 31,             
|                   |  | 2004            |        | 2005                      |       | 2005  
|                   |  | Millions of yen |        | Thousands of U.S. dollars
|Deferred Revenue   |  |                 |        |                           |       |        |  |   |        
|Japan              |  | (Yen)           | 12,369 |                           | (Yen) | 13,972 |  | $ | 118,407
|North America      |  |                 | 5,597  |                           |       | 8,387  |  |   | 71,073 
|Europe             |  |                 | 7,469  |                           |       | 9,068  |  |   | 76,851 
|Asia Pacific       |  |                 | 1,968  |                           |       | 2,765  |  |   | 23,437 
|Latin America      |  |                 | 501    |                           |       | 1,189  |  |   | 10,073 
|                   |  |                 |        |                           |       |        |  |   |        
|Consolidated Total |  | (Yen)           | 27,904 |                           | (Yen) | 35,381 |  | $ | 299,841
|                   |  |                 |        |                           |       |        |  |   |        



Most of deferred
revenue at December 31, 2004 and 2005 was attributable to Japan, North America and Europe. Deferred revenue in Japan at December 31, 2005 increased 13% compared with December 31, 2004 due mainly to increased net sales of Trend
Micro Premium Support to corporate users and the strong demand for Virus Buster 2006 in consumer market. Deferred revenue in North America at December 31, 2005 increased 50% compared with December 31, 2004 due mainly to
increased net sales as a result of the growing brand recognition and new relationship with and sales through high-profile retail channel partners in consumer market. Deferred revenue in Europe at December 31, 2005 increased 21% compared with
December 31, 2004 due mainly to steady increase of demand in the small and medium business market and starting new business in Middle East and Africa.



Net cash provided by operating activities was approximately (Yen) 24,900 million in 2004 and (Yen) 20,646 million ($ 174,962 thousand) in 2005.
The decrease from 2004 to 2005 was primarily due to a substantial decrease in accrued income and other taxes.



Net cash used in investing activities was approximately (Yen) 16,030 million in 2004 and approximately (Yen) 12,738 million ($ 107,948 thousand)
in 2005. The decrease from 2004 to 2005 was primarily due to a (Yen) 17,094 million ($ 144,861 thousand) increase of proceeds from sales and maturities of marketable securities. This decreased cash outflow was partially offset by (Yen)
10,803 million ($ 91,555 thousand) increase of the payment for marketable securities and securities investments and the payment of (Yen) 2,717 million ($ 23,023 thousand) for business combination.



Net cash used by financing activities was approximately (Yen)
3,250 million in 2004 and approximately (Yen) 2,406 million ($ 20,388 thousand) in 2005. The decrease from 2004 to 2005 was primarily due to no redemption of bonds ( (Yen) 6,500 million ($ 55,084 thousand)) and net proceeds from
treasury stock ( (Yen) 3,271 million ($ 27,724 thousand) ). These cash inflow was partially offset by (Yen) 5,937 million ($ 50,315 thousand) decrease in the issuance of common stock pursuant to the exercise of stock warrants and stock
acquisition rights and (Yen) 2,963 million ($25,112 thousand) increase in dividends paid.



Net cash provided by operating activities was approximately (Yen) 15,666 million in 2003 and (Yen) 24,900 million in 2004. The increase from 2003 to 2004 was primarily due to an increase of net income and
the stronger increase in deferred revenue.



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Net cash used in investing activities was approximately (Yen) 9,453 million in 2003 and
approximately (Yen) 16,030 million in 2004. The increase from 2003 to 2004 was primarily due to a (Yen) 6,991 million increase in payments for purchases of marketable securities and security investments and the payment of (Yen)
2,156 million for purchases of marketable securities with maturities of three months or less. These increases in payments ware partially offset by a (Yen) 2,041 million increase in proceeds from sales of marketable securities.



Net cash used by financing activities was approximately (Yen)
6,811 million in 2003 approximately (Yen) 3,250 million in 2004. The decrease from 2003 to 2004 was primarily due to a (Yen) 7,771 million increase in the issuance of common stock pursuant to the exercise of stock warrants and stock
acquisition rights. This increase in proceeds was partially offset by the payment of (Yen) 1,820 million dividends and a (Yen) 1,500 million increase in redemption of bonds.



At the sixteenth ordinary general meeting of our shareholders held on March 25, 2005, a dividend of (Yen)
36.00 per share was approved. Based on the number of shares outstanding as of December 31, 2004, the record date for the dividend, the maximum cash dividend amount we will pay is (Yen) 4,794 million.



At the seventeenth ordinary general meeting of our shareholders held on March 28, 2006,
a dividend of (Yen) 56.00 ($0.47) per share was approved. Based on the number of shares outstanding as of December 31, 2005, the record date for the dividend, the maximum cash dividend amount we will pay is (Yen) 7,509 million.



We issued (Yen) 5,000 million worth of unsecured bonds due March 2004
with detachable warrants in connection with our 2001 incentive plan in March 2001. The bonds bear interest at the annual rate of 1.75%. These bonds were redeemed in March 2004.



We issued (Yen) 1,500 million worth of unsecured bonds due June 2004 with detachable warrants in connection with our
2001 incentive plan in June 2001. The bonds bear interest at the annual rate of 1.5%. These bonds were redeemed in June 2004.



We issued (Yen) 6,000 million worth of unsecured bonds due November 2004 with detachable warrants in connection with our 2001 incentive plan in
November 2001. The bonds bear interest at the annual rate of 1.75%. (Yen) 6,000 million worth of unsecured bonds issued in November 2001 was repurchased in December 2001. These bonds were redeemed in November 2004.



We issued (Yen) 4,000 million worth of unsecured bonds due April 2006
with detachable warrants in connection with our 2002 incentive plan in April 2002. The bonds bear interest at the annual rate of 1.90%. (Yen) 4,000 million worth of unsecured bonds issued in April 2002 were repurchased in May 2002.



We have invested the proceeds of the bonds in cash and other short-term
investments. Since these investments are likely to yield less interest income than the interest expense on the bonds, we incurred a net interest expense with respect to the bonds.



In order to reduce interest cost, we repurchased some of the bonds in the market with the intention to hold the treasury
bonds until they can be extinguished legally. As the repurchase transaction is deemed as redemption of the bonds in substance, the treasury bonds are offset with the bonds on the face of our consolidated balance sheet. We used the proceeds of the
bond issuance for working capital and general corporate purposes.



In 1998, we entered into three overdraft agreements with Japanese commercial banks, under which we are able to obtain short-term financing at prevailing interest rates for periods not in excess of one year. One of the three overdraft
agreements was terminated in 2002 and the other two agreements have been cancelled as of February 28, 2005.



C. Research and Development, Patents and Licenses, etc.



RESEARCH AND PRODUCT DEVELOPMENT



Our research and product development activities focus on the development of new anti-virus and security software, enhancements to existing products and
integration of products to enable monitoring, updating and management via the Internet. We conduct research and development at our Tokyo headquarters and our U.S., Taiwan, Germany, U.K., and China subsidiaries and have a research staff of 800
engineers as of December 31, 2005.



Research and
development and maintenance expenditures, consisting primarily of software development costs and research and development staff salaries and benefits, increased from (Yen) 3,919 million in 2003 to (Yen) 4,858 million in 2004 and to (Yen)
6,066 million ($ 51.4 million) in 2005.



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INTELLECTUAL PROPERTY



Our ability to compete successfully depends in part on our ability to protect the proprietary technology contained in our software products. We rely upon
a combination of patent, trademark, copyright and trade secret laws and contractual provisions to establish and protect proprietary rights in our software.



Our U.S. and Taiwanese subsidiaries hold the following principal patents relating to core technologies:



|                                                                                              |  |          |  |                  |  |                     |  |                |  |                                  
|--------------------------------------------------------------------------------------------- |  | -------- |  | ---------------- |  | ------------------- |  | -------------- |  | ---------------------------------
|NAME                                                                                          |  | STATUS   |  | REGISTRATIONDATE |  | REGISTRATION NUMBER |  | EXPIRATIONDATE |  | APPLICANT/PATANTEE               
|Method and apparatus for controlling network and workstation access prior to workstation boot |  | Patented |  | 8/22/1995        |  | 5,444,850           |  | 8/3/2013       |  | Trend Micro Inc. (USA)           
|Virus detection and removal apparatus for computer networks                                   |  | Patented |  | 4/22/1997        |  | 5,623,600           |  | 9/25/2015      |  | Trend Micro Inc. (USA)           
|Method and apparatus for controlling network and workstation access prior to workstation boot |  | Patented |  | 10/21/1997       |  | 5,680,547           |  | 8/7/2015       |  | Trend Micro Incorporated (Taiwan)
|                                                                                              |  |          |  |                  | 
|Apparatus and method for electronic mail virus detection and elimination                      |  | Patented |  | 3/30/1999        |  | 5,889,943           |  | 3/28/2016      |  | Trend Micro Incorporated (Taiwan)
|System, apparatus and method for the detection and removal of viruses in macros               |  | Patented |  | 9/14/1999        |  | 5,951,698           |  | 10/1/2016      |  | Trend Micro Incorporated (Taiwan)
|                                                                                              |  |          |  |                  | 
|Event triggered iterative virus detection                                                     |  | Patented |  | 9/28/1999        |  | 5,960,170           |  | 3/17/2017      |  | Trend Micro Incorporated (Taiwan)
|Computer network malicious code scanner                                                       |  | Patented |  | 11/9/1999        |  | 5,983,348           |  | 9/9/2017       |  | Trend Micro Inc. (USA)           
|Controlled distribution of application programs in a computer network                         |  | Patented |  | 9/12/2000        |  | 6,119,165           |  | 11/16/2017     |  | Trend Micro Inc. (USA)           
|Computer network malicious code scanner method and apparatus                                  |  | Patented |  | 8/7/2001         |  | 6,272,641           |  | 11/8/2019      |  | Trend Micro Inc. (USA)           
|Distributed virus scanning arrangements and methods therefore                                 |  | Patented |  | 4/27/2004        |  | 6,728,886           |  | 11/30/2019     |  | Trend Micro Inc. (USA)           
|Techniques for providing add-on services for an email system                                  |  | Patented |  | 12/28/04         |  | 6,836,792           |  | 12/2/2019      |  | Trend Micro Inc. (USA)           



We plan to transfer
the ownership of these patents to Trend Micro (Japan).



We do
not typically enter into signed license agreements with our corporate, government and institutional customers who license products directly from us. We include an electronic version of a shrinkwrap license in all of our electronically
distributed software and a printed license in the box for our packaged products in order to protect our copyrights in those products. The enforceability of these licenses generally is uncertain in the United States as well as in foreign
jurisdictions. In addition, the laws of some foreign countries either do not protect proprietary rights or offer only limited protection for those rights.



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In addition, as is common in the software industry, third parties may sue us for alleged infringement of
their intellectual property rights. We may also have to take legal action to defend our intellectual property from infringement.



We also generally enter into confidentiality agreements with our employees, and limit access to and distribution of proprietary information.



D. Trend Information.



The information required by this Item is set forth in Item 5.A of this
annual report.



E. Off-Balance Sheet Arrangements.



We are not a party to any material off-balance sheet arrangements. In
addition, we have no unconsolidated special purpose financing or partnership entities that are likely to create material contingent obligations.



F. Tabular Disclosure of Contractual Obligations.



Future payments due under our debt and lease obligations as of December 31, 2005 were as follows:



|                  |  |                                               |   |                                 |       |       |  |                 |       |  |   |       
|----------------- |  | --------------------------------------------- | - | ------------------------------- | ----- | ----- |  | --------------- | ----- |  | - | ------
|                  |  | Long-term debt                                |   | Non-cancelable operating leases |       | Total |  | Total in U.S. $
|                  |  | (in millions of yen and thousands of dollars)
|Less than 1 year  |  | (Yen)                                         |  |                                 | (Yen) | 1,049 |  | (Yen)           | 1,049 |  | $ | 8,892 
|2-3 years         |  |                                               |  |                                 |       | 714   |  |                 | 714   |  |   | 6,049 
|4-5 years         |  |                                               |  |                                 |       | 96    |  |                 | 96    |  |   | 817   
|More than 5 years |  |                                               |  |                                 |       |      |  |                 |      |  |   |      
|                  |  |                                               |   |                                 |       |       |  |                 |       |  |   |       
|Total             |  | (Yen)                                         |  |                                 | (Yen) | 1,859 |  | (Yen)           | 1,859 |  | $ | 15,758
|                  |  |                                               |   |                                 |       |       |  |                 |       |  |   |       



As of
December 31, 2005, we had no capital lease obligations, purchase obligations, or long-term liabilities reflected in our financial statements included in this annual report other than those set forth in the table above.



Item 6. Directors, Senior Management and Employees



A. Directors and Senior Management.



The following table shows information regarding our directors and executive
officers as of December 31, 2005.



|                   |  |     |  |                                                                                                        |  |                                              |  |                                                |  |                                  |  
|------------------ |  | --- |  | ------------------------------------------------------------------------------------------------------ |  | -------------------------------------------- |  | ---------------------------------------------- |  | -------------------------------- | -
|Name               |  | Age |  | Position(s)                                                                                            |  | Month and year in which Current Term Expires |  | Number of Shares owned as of December 31, 2005 |  | Percent ofnumber ofShares issued |  
|Steve Chang        |  | 51  |  | Representative Director and Chairman of the Board                                                      |  | March 2007                                   |  | 5,368,000                                      |  | 3.9                              | %
|Eva Chen           |  | 47  |  | Representative Director; President and Chief Executive Officer                                         |  | March 2007                                   |  | 2,159,950                                      |  | 1.6                              | %
|Mahendra Negi      |  | 46  |  | Representative Director, Chief Operating Officer, Chief Financial Officer and Executive Vice President |  | March 2007                                   |  | 20,500                                         |  | 0.0                              | %
|Hirotaka Takeuchi  |  | 59  |  | Director                                                                                               |  | March 2007                                   |  | 0                                              |  |                                 |  
|Fumio Hasegawa     |  | 66  |  | Corporate Auditor                                                                                      |  | March 2009                                   |  | 500                                            |  | 0.0                              | %
|Sadatoshi Nakayama |  | 54  |  | Corporate Auditor                                                                                      |  | March 2009                                   |  | 0                                              |  |                                 |  
|Yasuo Kameoka      |  | 50  |  | Corporate Auditor                                                                                      |  | March 2009                                   |  | 0                                              |  |                                 |  
|Koji Fujita        |  | 43  |  | Corporate Auditor                                                                                      |  | March 2009                                   |  | 0                                              |  |                                 |  



Steve Chang is the
founder and Chairman of Trend Micro. He has been serving as our Representative Director since December 1995. Chang formed Trend Micro in California in 1988, with the goal of developing anti-virus software for personal computers. Prior to launching
Trend Micro, Chang worked as an engineer at Hewlett Packard and later founded AsiaTek, Inc., a Taiwan-based UNIX software design company. Steve Chang received his B.S. in Applied Mathematics from Fu-Jen Catholic University in Taiwan and his M.S. in
Computer Science from Lehigh University, Pennsylvania in 1978. He is also currently serving as a director of SOFT TREND CAPITAL Corporation.



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Eva Chen is one of the co-founders of Trend Micro. She has been our President and Chief Executive Officer
and has been serving as our Representative Director since January 1, 2005. She has been Director since August 1997. She graduated from Texas University in 1988. She is also Steve Changs sister-in-law.



Mahendra Negi is the Chief Operating Officer, Chief Financial Officer and a
Representative Director of Trend Micro. He has been serving as a Representative Director since March 2002. He joined Trend Micro in May 2000 from Merrill Lynch. He started his career in the petroleum industry, and then moved to commercial banking
before joining Merrill Lynch. He graduated from Nagpur University in India in addition to his MSc (Master of Science) in Management from the London Business School in 1993.



Dr. Hirotaka Takeuchi is Dean of the Graduate School of International Corporate Strategy, Hitotsubashi University. He
has been serving as our Outside Director since March 2005. He became an assistant professor at the Graduate School of Business Administration at Harvard University before returning to Japan in 1983 as an assistant professor at Hitotsubashi
Universitys School of Commerce, where he later became professor in 1987. He has held his present position at the Graduate School of International Corporate Strategy since 1998. He went on to receive an MBA in 1971 and a Ph.D. in 1977 from the
Graduate School of Business Administration at the University of California, Berkeley. He is also currently serving as an outside director of ORIX Corporation.



Fumio Hasegawa graduated from Chuo University with a degree from the commercial science department in 1967. He has worked for Shell Oil and Tokyo Shell
Pack. He became one of our Corporate Auditors in March 2000.



Sadatoshi Nakayama graduated from Kyoto Universitys Department of Science in 1977. He has worked for the Chuo Audit Corporation (now ChuoAoyama PricewaterhouseCoopers) and established Sadatoshi Nakayama CPA Office in 1992. He is
currently the head of Sadatoshi Nakayama CPA Office and became one of our Corporate Auditors in March 2001.



Yasuo Kameoka graduated from Sohka Universitys Department of Economics in 1978. He joined PriceWaterhouse in 1978 and Tokuichi Hayashi CPA Office in
1988. Currently he is a Chief Director and Senior Partner of Taiko Audit Corporation. He became one of our Corporate Auditors in March 2001.



Koji Fujita graduated from Hitotsubashi Universitys Department of Juristic Law in 1987. He was admitted to the Japanese Bar, joined Okuno &
Partners legal office in April 1989. He became one of our Corporate Auditors in March 2002. He is also currently serving as a corporate auditor of TOEI Housing Corporation.



B. Compensation.



For the fiscal year ended December 31, 2005, the aggregate compensation of all directors and executive officers paid or accrued by Trend Micro was
109 million yen ($923 thousand), 91 million yen ($771 thousand) for directors and 18 million yen ($152thousand) for corporate auditors. Under the Japanese Commercial Code and local practice, we may make severance payments to a retired
director or corporate auditor with shareholder approval when our management proposes such payments based on a resolution of our Board of Directors. We have an internal formula to determine the amounts of severance payments to corporate auditors when
we make such a proposal for corporate auditors. We have not recorded any liabilities relating to severance payments to directors and corporate auditors as of December 31, 2001, 2002, 2003, 2004 and 2005 because we have no liabilities to
directors, and related liabilities to corporate auditors were insignificant.



Information regarding stock options granted to our directors and executive officers is provided in Item 6.E.



C. Board Practices.



Directors are elected at a general meeting of shareholders, and the normal term of office of a director is two years, although they may serve any number
of consecutive terms. We do not have audit or remuneration committees, a standard practice in Japan. We do not have any service contracts with any of our directors providing for benefits upon termination of employment.



In accordance with the requirements of the Company Law of Japan, our Articles
of Incorporation provide for not more than four (4) corporate auditors. Corporate auditors, of whom at least two must be from outside of the company, are elected at a general meeting of shareholders, and the normal term of office of a corporate
auditor is four years, although they may serve any number of consecutive terms. Corporate auditors are under a statutory duty to oversee the administration of our affairs by the directors, to examine our financial statements and business reports to
be submitted by the Board of Directors to the general meetings of shareholders and to report their opinions thereon to the shareholders, and to oversee accounting firms which audit our financial statements. They are required to attend meetings of
the Board of Directors and to express their opinions if necessary, but they are not entitled to vote. Corporate auditors also have a statutory duty to provide their report on the audit report prepared by our independent certified public accountants
to the board of corporate auditors, which must submit its audit report to the Board of Directors. The board of corporate auditors will also determine matters relating to the duties of the corporate auditors, such as audit policy and methods of
investigation of our affairs.



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Nasdaq Marketplace Rule 4350(a)(1) provides that a foreign private issuer may follow its home country
practice in lieu of the requirements of Rule 4350, provided that such foreign private issuer discloses in its annual reports filed with the Securities and Exchange Commission each requirement of Rule 4350 that it does not follow and describes the
home country practice followed by the issuer in lieu of such requirements.



Nasdaq Marketplace Rule 4350(c) requires that (i) a majority of the board of directors be independent directors as defined in Rule 4200(a)(15), (ii) independent directors have regularly scheduled meetings at
which only they are present, (iii) compensation of the chief executive officer and other executive officers be determined, or recommended to the board of directors for determination, either by a majority of the independent directors or by a
compensation committee comprised solely of independent directors, and (iv) director nominees be selected, or recommended for selection by the board of directors, either by a majority of the independent directors or by a nominations committee
comprised solely of independent directors, in accordance with the nominations process set forth in a formal written charter or board resolution. For large Japanese companies under the Company Law of Japan ( Large Japanese Companies),
including us, which employ a corporate governance system based on a board of corporate auditors, Japans Company Law has no independence requirement with respect to directors. As discussed above, the task of overseeing management and accounting
firms is assigned to the corporate auditors, who are separate and independent from the companys management. Large Japanese Companies, including us, are required to have at least 50% outside corporate auditor who must meet
additional independence requirements under the Company Law. An outside corporate auditor is defined in the Company Law as a corporate auditor who had not served as a director, manager or any other employee of the company or any of its subsidiaries
at any time prior to the appointment. Currently, we have four outside corporate auditors.



Nasdaq Marketplace Rule 4350(d) requires that (i) each issuer have adopted a formal written audit committee charter meeting the requirements of Rule 4350(d)(1) and (ii) the issuer have an audit committee of
at least three members who are independent as defined under Rule 4200(a)(15), meet the independence criteria set forth in Rule 10A-3(b)(1) under the U.S. Securities Exchange Act of 1934 and satisfy certain other criteria. Like a majority of Japanese
companies, we employ the corporate auditor system as described above. Under this system, the board of corporate auditors is a legally separate and independent body from the board of directors. The function of the board of corporate auditors is
similar to that of independent directors, including those who are members of the audit committee, of a U.S. company: to monitor the performance of the directors, and review and express an opinion on the method of auditing by the companys
accounting firm and on such accounting firms audit reports, for the protection of the companys shareholders. Large Japanese Companies, including us, are required to have at least three corporate auditors. Currently, we have four
corporate auditors. In addition, as discussed above, our corporate auditors serve a longer term than our directors. Starting on July 31, 2005, when the requirements of Rule 10A-3 relating to listed company audit committees become applicable to
foreign private issuers, we expect to rely on an exemption under that rule which is available to foreign private issuers with boards of corporate auditors meeting certain criteria. We will make the disclosure required by Item 16D of Form 20-F
regarding such reliance in our annual reports on Form 20-F for the fiscal year ending December 31, 2005 and thereafter.



Nasdaq Marketplace Rule 4350(f) provide that each issuer provide for a quorum as specified in its by-laws for any meeting of holders of common stock,
which shall be at least 33 1/3% of the outstanding shares of the issuers voting common stock. We provide for a quorum as specified in the Articles of Incorporation for any meeting of holders of common stock, which shall be at least one-third
of our outstanding shares of the voting common stock.



Nasdaq
Marketplace Rule 4350(g) provides that each issuer solicit proxies and provide proxy statements for all meetings of shareholders and provide copies of such proxy solicitation to Nasdaq. Currently a Japanese company whose shares are listed on the
securities exchanges defined in the Securities and Exchange Law, including us, may, but is not required to, solicit proxies for meetings of shareholders. If such a Japanese company solicits proxies for a meeting of shareholders, it is required to
provide proxy statements and documents for reference as provided for in the Securities and Exchange Law and provide copies of such proxy statements and documents for reference to the Kanto Local Finance Bureau.



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Nasdaq Marketplace Rule 4350(h) provides that each issuer conduct appropriate review of all related party
transactions for potential conflict of interest situations on an ongoing basis and that all such transactions be approved by the issuers audit committee or another independent body of the board of directors. Following the requirements of the
Company Law of Japan, we require a director to obtain the approval of the Board of Directors in order for such director to accept a transfer of a product or any other asset of Trend Micro, to transfer a product or any other asset of such director to
Trend Micro, to receive a loan from Trend Micro, or to effect any other transaction with Trend Micro, for himself or a third party.



Nasdaq Marketplace Rule 4350(i) provides that shareholder approval be obtained prior to the issuance of designated securities under subparagraph (A), (B),
(C) or (D) of Rule 4350(i). Where a Japanese joint stock company (Kabushiki-Gaisha), issues common shares or other shares, stock acquisition rights or bonds with stock acquisition rights under the Commercial Code of Japan, it is necessary
for the board of directors to determine the conditions of issuance; provided, however, that this shall not apply if the Articles of Incorporation provide that such conditions shall be determined by the shareholders meeting. Currently, Trend
Micros Articles of Incorporation do not provide for any such exception. Additionally, if the company issues such securities to persons other than shareholders (in case of common shares or other shares) at a specially favorable issue price or
(in case of stock acquisition rights or bonds with stock acquisition rights) on specially favorable conditions, even when there are provisions related thereto in the Articles of Incorporation, some matters related to such issuance shall be resolved
by special resolution of the shareholders meeting.



The
rights of ADR holders, including their rights relating to corporate governance practices, are provided in the deposit agreement which is an exhibit to this annual report.



LIMITATION OF LIABILITIES OF SOME DIRECTORS



We have entered into an agreement with one of our directors, Hirotaka Takeuchi, that limits his liabilities to us for damages suffered by us due to his
acts taken in good faith and without gross negligence, up to the higher of (a) (Yen)10 million or (b) the amount specified in the agreement, which is the aggregate amount of two years remunerations and other compensation received or
entitled to be received by him.



D. Employees.



As of December 31, 2004, we had 2,466 employees, of whom 1,719 were
located in Asia, 381 were located in the United States, 281 were located in Europe and 85 were located in other regions. And of the 2,466 employees, 421 were in administrative positions, 653 were in sales and marketing positions, 641 were in
research and development positions and 751 were in technical support positions.



As of December 31, 2005, we had 2,982 employees, of whom 2,116 were located in Asia, 462 were located in the United States, 349 were located in Europe and 55 were located in Latin America. And of the 2,982
employees, 494 were in administrative positions, 828 were in sales and marketing positions, 800 were in research and development positions and 860 were in technical support positions.



Our employees do not belong to any labor union. We believe that our employee relations are good.



E. Share Ownership.



See Item 6.A for information on share ownership of our directors and senior management.



2002 INCENTIVE PLAN



We have adopted the Trend Micro Incorporated Incentive Plan. The plan was authorized in April 2002 and expired on
April 11, 2006.



2003 INCENTIVE PLAN



Our Shareholders Meeting and Board of Directors have authorized three
incentive plans for fiscal 2003. The first plan was authorized in February 2003. Stock acquisition rights for a total of 1,999,500 shares were issued at an exercise price of (Yen) 2,230, of which 290,500 shares have been redeemed as of January 2004,
184,000 shares have been redeemed as of June 2005, and 16,500 shares have been redeemed as of December 2005. As of April 30, 2006, stock acquisition rights for total of 1,036,500 shares have been exercised.



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The following table shows information about the acquisition rights granted to our directors and executive
officers under the first 2003 incentive plan, which were outstanding as of April 30, 2006.



|                                                       |  |                 |  |                                   |  |                          |           
|------------------------------------------------------ |  | --------------- |  | --------------------------------- |  | ------------------------ | ----------
|Name                                                   |  | Expiration Date |  | Total Number of Shares Underlying |  | Aggregate Exercise Price
|Steve Chang                                            |  | 10/31/2007      |  | 1,500                             |  | (Yen)                    | 3,345,000 
|Eva Chen                                               |  | 10/31/2007      |  | 18,500                            |  | (Yen)                    | 41,255,000
|Mahendra Negi                                          |  | 10/31/2007      |  | 21,000                            |  | (Yen)                    | 46,830,000
|Directors and Executive Officers as a group (8 people) |  | 10/31/2007      |  | 41,000                            |  | (Yen)                    | 91,430,000



The second plan was
authorized in May 2003. Stock acquisition rights for a total of 2,500,000 shares were issued at an exercise price of (Yen) 1,955, of which 215,500 shares have been redeemed as of January 2004, 334,500 shares have been redeemed as of June 2005, and
25,500 shares have been redeemed as of December 2005. As of April 30, 2006, stock acquisition rights for a total of 872,500 shares have been exercised.



The following table shows information about the options granted to our directors and executive officers under the second 2003 incentive plan, which were
outstanding as of April 30, 2006.



|                                                       |  |                 |  |                                   |  |                         |            
|------------------------------------------------------ |  | --------------- |  | --------------------------------- |  | ----------------------- | -----------
|Name                                                   |  | Expiration Date |  | Total Number of Shares Underlying |  | Aggregate ExercisePrice
|Steve Chang                                            |  | 5/27/2008       |  | 24,000                            |  | (Yen)                   | 46,920,000 
|Eva Chen                                               |  | 5/27/2008       |  | 45,000                            |  | (Yen)                   | 87,975,000 
|Mahendra Negi                                          |  | 5/27/2008       |  | 55,000                            |  | (Yen)                   | 107,525,000
|Directors and Executive Officers as a group (8 people) |  | 5/27/2008       |  | 124,000                           |  | (Yen)                   | 242,420,000



The third plan was
authorized in November 2003. Stock acquisition rights for a total of 1,500,000 shares were issued at an exercise price of (Yen) 2,695, of which 179,500 shares have been redeemed as of June 2005, and 19,000 shares have been redeemed as of December
2005. As of April 30, 2006, stock acquisition rights for a total of 546,500 shares have been exercised.



The following table shows information about the options granted to our directors and executive officers under the third 2003 incentive plan, which were
outstanding as of April 30, 2006.



|                                                       |  |                 |  |                                   |  |                         |            
|------------------------------------------------------ |  | --------------- |  | --------------------------------- |  | ----------------------- | -----------
|Name                                                   |  | Expiration Date |  | Total Number of Shares Underlying |  | Aggregate ExercisePrice
|Steve Chang                                            |  | 11/13/2008      |  | 15,000                            |  | (Yen)                   | 40,425,000 
|Eva Chen                                               |  | 11/13/2008      |  | 38,500                            |  | (Yen)                   | 103,757,500
|Mahendra Negi                                          |  | 11/13/2008      |  | 29,000                            |  | (Yen)                   | 78,155,000 
|Directors and Executive Officers as a group (8 people) |  | 11/13/2008      |  | 82,500                            |  | (Yen)                   | 222,337,500



2004 INCENTIVE PLAN



Our Shareholders Meeting and Board of Directors have authorized two
incentive plans for fiscal 2004. The first plan was authorized in April 2004. Stock acquisition rights for a total of 3,000,000 shares were issued at an exercise price of (Yen) 4,310, of which 209,500 shares have been redeemed as of June 2005, and
126,500 shares have been redeemed as of December 2005. As of April 30, 2006, stock acquisition rights for a total of 2,000 shares have been exercised.



The following table shows information about the acquisition rights granted to our directors and executive officers under the first 2004 incentive plan,
which were outstanding as of April 30, 2006.



|                                                       |  |                 |  |                                   |  |                          |            
|------------------------------------------------------ |  | --------------- |  | --------------------------------- |  | ------------------------ | -----------
|Name                                                   |  | Expiration Date |  | Total Number of Shares Underlying |  | Aggregate Exercise Price
|Eva Chen                                               |  | 4/27/2009       |  | 80,000                            |  | (Yen)                    | 344,800,000
|Mahendra Negi                                          |  | 4/27/2009       |  | 70,000                            |  | (Yen)                    | 301,700,000
|Directors and Executive Officers as a group (8 people) |  | 4/27/2009       |  | 150,000                           |  | (Yen)                    | 646,500,000



The second plan was
authorized in October, 2004 Stock acquisition rights for a total of 2,000,000 shares were issued at an exercise price of (Yen) 5,090, of which 40,500 shares have been redeemed as of June 2005, and 85,500 shares have been redeemed as of December
2005.



- 42 -



---

The following table shows information about the options granted to our directors and executive officers
under the second 2004 incentive plan, which were outstanding as of April 30, 2006.



|                                                       |  |                 |  |                                   |  |                          |            
|------------------------------------------------------ |  | --------------- |  | --------------------------------- |  | ------------------------ | -----------
|Name                                                   |  | Expiration Date |  | Total Number of Shares Underlying |  | Aggregate Exercise Price
|Eva Chen                                               |  | 10/27/2009      |  | 80,000                            |  | (Yen)                    | 407,200,000
|Mahendra Negi                                          |  | 10/27/2009      |  | 56,000                            |  | (Yen)                    | 285,040,000
|Directors and Executive Officers as a group (8 people) |  | 10/27/2009      |  | 136,000                           |  | (Yen)                    | 692,240,000



2005 INCENTIVE PLAN



Our Shareholders Meeting and Board of Directors have authorized two
incentive plans for fiscal 2005. The first plan was authorized in July 2005. Stock acquisition rights for a total of 3,457,500 shares were issued at an exercise price of (Yen) 3,840, of which 67,500 shares have been redeemed as of December 2005.



The following table shows information about the acquisition
rights granted to our directors and executive officers under the first 2005 incentive plan, which were outstanding as of April 30, 2006.



|                                                       |  |                 |  |                                   |  |                          |            
|------------------------------------------------------ |  | --------------- |  | --------------------------------- |  | ------------------------ | -----------
|Name                                                   |  | Expiration Date |  | Total Number of Shares Underlying |  | Aggregate Exercise Price
|Eva Chen                                               |  | 7/21/2010       |  | 90,000                            |  | (Yen)                    | 345,600,000
|Mahendra Negi                                          |  | 7/21/2010       |  | 120,000                           |  | (Yen)                    | 460,800,000
|Directors and Executive Officers as a group (8 people) |  | 7/21/2010       |  | 210,000                           |  | (Yen)                    | 806,400,000



The second plan was
authorized in December, 2005 Stock acquisition rights for a total of 2,500,000 shares were issued at an exercise price of (Yen) 3,950.



The following table shows information about the options granted to our directors and executive officers under the second 2005 incentive plan, which were
outstanding as of April 30, 2006.



|                                                       |  |                 |  |                                   |  |                          |            
|------------------------------------------------------ |  | --------------- |  | --------------------------------- |  | ------------------------ | -----------
|Name                                                   |  | Expiration Date |  | Total Number of Shares Underlying |  | Aggregate Exercise Price
|Steve Chang                                            |  | 12/13/2010      |  | 10,000                            |  | (Yen)                    | 39,500,000 
|Eva Chen                                               |  | 12/13/2010      |  | 10,000                            |  | (Yen)                    | 39,500,000 
|Mahendra Negi                                          |  | 12/13/2010      |  | 60,000                            |  | (Yen)                    | 237,000,000
|Directors and Executive Officers as a group (8 people) |  | 12/13/2010      |  | 80,000                            |  | (Yen)                    | 316,000,000



Item 7. Major Shareholders and
Related Party Transactions.



A. Major Shareholders.



The Securities and Exchange Law of Japan requires any company which is the
issuer of securities which are, among other considerations, listed on any Japanese stock exchange in Japan to disclose information about its major shareholders, including approximately its ten largest shareholders of record as of the end of each
fiscal year and each semi-annual period. Also, as explained under Item 10.D below, any person who becomes, beneficially or of record and solely or jointly, a holder of more than 5% of the total issued shares of a company listed on any Japanese
stock exchange, as calculated pursuant to the Securities and Exchange Law of Japan, must file with the Local Finance Bureau having jurisdiction within five business days a report concerning such shareholding. For this purpose, shares issuable to
such person upon his exchange of exchangeable securities, conversion of convertible securities or exercise of warrants or stock acquisition rights are taken into account in determining both the size of his holding and the issuers total issued
shares.



As of December 31, 2005, there were three
shareholders of record holding 5% or more of the total issued shares of our common stock. One of these shareholders of record, Trueway Company Limited, which held of record 20,186,500 shares, or 14.7% of the total issued shares, is a corporation
controlled by Yeh Min-Yuen. Another record shareholder, Gainway Enterprises Limited, which held of record 10,108,000 shares, or 7.3% of the total issued shares, is a corporation controlled by Liao Hsueh-Hsuan. These two individuals beneficial
ownership of our common stock is disclosed in the table below.



Master Trust Bank of Japan is the custody bank of Japanese mutual funds, pension fund and other trust funds. Master Trust Bank of Japan held of record 9,307,500 shares, or 6.8% of the total issued shares.



- 43 -



---

Within the last three years, to our knowledge, the following significant changes in the percentage
ownership held by major shareholders have occurred:



We are
aware of the filing by Barclays Global Investors that, as of March 31, 2005, it and its affiliates together owned, beneficially or of record, 6.4% of the issued shares of our common stock, as calculated pursuant to the Securities and Exchange
Law of Japan. Subsequently, Barclays Global Investors made another filing, which reported that, as of June 30, 2005, it and its affiliates owned, beneficially or of record, 5.3% of the issued shares of our common stock, as calculated pursuant
to the Securities and Exchange Law of Japan. Barclays Global Investors made another filing reporting that, as of August 31, 2005, their beneficial or record ownership fell below 5% of the issued shares of our common stock, as calculated
pursuant to the Securities and Exchange Law of Japan. Again, Barclays Global Investors made another filing, which reported that, as of September 30, 2005, it and its affiliates owned, beneficially or of record, 5.0% of the issued shares of our
common stock, as calculated pursuant to the Securities and Exchange Law of Japan. Barclays Global Investors made another filing reporting that, as of December 31, 2005, their beneficial or record ownership fell below 5% of the issued shares of
our common stock, as calculated pursuant to the Securities and Exchange Law of Japan.



We are aware of the filing by Capital Guardian Trust Company that, as of July 31, 2005, it and its affiliates together owned, beneficially or of record, 6.9% of the issued shares of our common stock, as
calculated pursuant to the Securities and Exchange Law of Japan. Subsequently, Capital Guardian Trust Company made another filing, which reported that, as of August 31, 2005, it and its affiliates owned, beneficially or of record, 9.4% of the
issued shares of our common stock, as calculated pursuant to the Securities and Exchange Law of Japan. Subsequently, Capital Guardian Trust Company made another filing, which reported that, as of December 16, 2005, it and its affiliates owned,
beneficially or of record, 10.4% of the issued shares of our common stock, as calculated pursuant to the Securities and Exchange Law of Japan. Subsequently, Capital Guardian Trust Company made another filing, which reported that, as of
January 13, 2006, it and its affiliates owned, beneficially or of record, 11.6% of the issued shares of our common stock, as calculated pursuant to the Securities and Exchange Law of Japan.



The following table shows information known to us regarding the beneficial
ownership of our common stock as of December 31, 2005, by each person known by us to beneficially own more than 5% of the outstanding shares of our Common stock.



|                 |  |                                           |  |            |  
|---------------- |  | ----------------------------------------- |  | ---------- | -
|                 |  | Shares of common stock beneficially owned | 
|Name             |  | Number                                    |  | Percentage |  
|Yeh Min-Yuen     |  | 20,186,500                                |  | 14.7       | %
|Liao Hsueh-Hsuan |  | 10,108,000                                |  | 7.3        | %



As of
December 31, 2005, there were 89 record shareholders with addresses in the United States, and those U.S. holders held 24,310,961 shares of our common stock including 1,565,200 held through our ADSs.



To the extent known to us, we are not directly or indirectly owned or
controlled by another corporation, by the Japanese or any other government or by any other natural or legal persons severally or jointly.



We know of no arrangements the operations of which may at a later time result in a change of control of Trend Micro.



B. Related Party Transactions



Jenny Chang, a sister of Representative Director, President and Chief Executive Officer Eva
Chen, and the spouse of Representative Director and Chairman of the Board Steve Chang, is a Senior Executive Vice President and Co-founder of Trend Micro.



Julie Lin is a sister of Steve Chang and is a Global Program Manager of Trend Micro U.S.



The compensation of the above listed persons is determined by Trend Micro on no more favorable terms than those applicable
to employees with equivalent qualifications and responsibilities.



C.
Interests of Experts and Counsel.



Not applicable.



- 44 -



---

Item 8. Financial Statements.



A. Consolidated Statements and Other Financial Information.



Consolidated Financial Statements



The information required by this item has been provided beginning on page F-2.



Legal or Arbitration Proceedings



The information on legal or arbitration proceedings required by this item is set forth in Item 4.B of this annual report.



Dividend Policy



We intend to continue to return profits to shareholders based on the net profit on a consolidated basis while striving to
enhance financial strength and secure inner reserve in order to deal with a volatile business environment and maintain a competitive edge against competitors. As our basic policy about dividends, we plan to pay a year-end dividend on the basis of a
dividend ratio of 40%.



B. Significant Changes.



See Item 5.B of this annual report for information on the redemption of
unsecured bonds.



Item 9. The Offer and Listing.



A. Offer and Listing Details.



JAPANESE OVER-THE-COUNTER MARKET AND THE TOKYO STOCK EXCHANGE



Our shares have been traded since August 18, 1998 on the Japanese over-
the-counter market. On August 17, 2000, our shares were listed on Tokyo Stock Exchange, which is the principal trading market for the shares. Prior to August 18, 1998, there was no public market for the shares. The following table shows,
for the periods indicated, the high and low closing per-share sale prices of the shares as reported by the Japan Securities Dealers Association and Tokyo Stock Exchange, retroactively taking into account the one-into-three stock split effected on
September 30, 1999, and the one-into-two stock split effected on March 31, 2001.



|                                 |  |                     |  |      
|-------------------------------- |  | ------------------- |  | -----
|                                 |  | Yen Price Per Share
|Japanese Over-The-Counter Market |  | High                |  | Low  
|                                 |  |                     |  |      
|1999                             |  | 12,500              |  | 1,183
|2000                             |  |                     |  |      
|First quarter                    |  | 16,400              |  | 8,450
|Second quarter                   |  | 9,550               |  | 4,750
|Third quarter (until August 16)  |  | 9,200               |  | 6,700
|Tokyo Stock Exchange             |  |                     |  |      
|2000                             |  |                     |  |      
|Third quarter (from August 17)   |  | 9,005               |  | 6,805
|Fourth quarter                   |  | 8,100               |  | 4,135
|2001                             |  | 6,375               |  | 1,670
|2002                             |  | 3,890               |  | 1,880
|2003                             |  | 3,530               |  | 1,440
|First quarter                    |  | 2,250               |  | 1,663
|Second quarter                   |  | 2,120               |  | 1,440
|Third quarter                    |  | 2,575               |  | 1,795
|Fourth quarter                   |  | 3,530               |  | 2,300
|2004                             |  | 5,730               |  | 2,815
|First quarter                    |  | 3,710               |  | 2,815
|Second quarter                   |  | 4,920               |  | 3,490
|Third quarter                    |  | 5,050               |  | 4,070
|Fourth quarter                   |  | 5,730               |  | 4,840
|2005                             |  |                     |  |      
|First quarter                    |  | 5,530               |  | 4,530
|Second quarter                   |  | 4,740               |  | 3,260
|Third quarter                    |  | 4,090               |  | 3,450
|Fourth quarter                   |  | 4,640               |  | 3,280
|2006                             |  |                     |  |      
|January                          |  | 4,620               |  | 3,550
|February                         |  | 3,910               |  | 3,560
|March                            |  | 4,130               |  | 3,470
|April                            |  | 4,410               |  | 4,020



- 45 -



---

On May 31, 2006, the closing sale price of our shares on the Tokyo Stock Exchange was (Yen) 3,840 per share.



U.S. MARKET



Certain of our shares have been traded on The NASDAQ National Market since
July 8, 1999 in the form of American Depositary Shares under the symbol TMIC. The following table shows, for the periods indicated, the high and low closing per-ADS sale price of the ADSs, retroactively taking into account the
one-into-three stock split effected on September 30, 1999, the one-into-two stock split effected on March 31, 2001, and the ten-into-one ADR ratio change which take effect on July 2, 2001.



|               |  |                      |  |      
|-------------- |  | -------------------- |  | -----
|               |  | Dollar Price Per ADS
|               |  | High                 |  | Low  
|1999           |  |                      |  |      
|Third quarter  |  | 65.63                |  | 23.33
|Fourth quarter |  | 121.25               |  | 66.88
|2000           |  | 159.38               |  | 32.50
|2001           |  | 59.38                |  | 14.50
|2002           |  | 30.90                |  | 15.55
|2003           |  | 31.65                |  | 12.16
|First quarter  |  | 18.90                |  | 14.22
|Second quarter |  | 17.80                |  | 12.16
|Third quarter  |  | 22.50                |  | 15.00
|Fourth quarter |  | 31.65                |  | 21.03
|2004           |  | 55.45                |  | 26.62
|First quarter  |  | 35.06                |  | 26.62
|Second quarter |  | 44.97                |  | 31.04
|Third quarter  |  | 46.50                |  | 37.41
|Fourth quarter |  | 55.45                |  | 44.46
|2005           |  |                      |  |      
|First quarter  |  | 54.00                |  | 42.48
|Second quarter |  | 43.70                |  | 30.16
|Third quarter  |  | 37.60                |  | 30.96
|Fourth quarter |  | 39.15                |  | 28.80
|2006           |  |                      |  |      
|January        |  | 40.11                |  | 31.48
|February       |  | 32.84                |  | 30.31
|March          |  | 35.37                |  | 29.69
|April          |  | 38.69                |  | 34.68



On May 31, 2006,
the closing sale price of the ADSs on The NASDAQ National Market was $35.00 per ADS.



B. Plan of Distribution.



Not applicable.



C. Markets.



See Item 9. A. of this annual report for information on the markets on
which our shares are listed or quoted.



D. Selling Shareholders.



Not applicable.



- 46 -



---

E. Dilution.



Not applicable.



F. Expenses of the Issue.



Not applicable.



Item 10. Additional Information.



A. Share Capital.



Not applicable.



B. Memorandum and Articles of Association.



The following is a summary of material information concerning the shares,
including summaries of material provisions of our Articles of Incorporation and Share Handling Regulations, and of the Company Law (as defined below) and related legislation. These summaries should be read together with the Articles of Incorporation
and the Share Handling Regulations which have been filed as exhibits to our previous filings with the Securities and Exchange Commission.



A new law to modernize and make overall amendments to the Japanese Commercial Code was promulgated on 26 July, 2005. As a result of such amendments,
the provisions governing joint stock corporations, which were currently included in the Commercial Code, has been embodied in a new company law (the Company Law). The Company Law came into effect as of the 1st May 2006.



GENERAL



Our authorized share capital as of March 31, 2006 is 250,000,000 shares, of which 136,877,990 shares are issued and
134,346,022 shares are outstanding as of the same date. Under the Company Law, shares must be registered and are transferable by delivery of share certificates when a company issues share certificate like us. In order to assert shareholders
rights against us, a shareholder must have its name and address registered on our register of shareholders, in accordance with our Share Handling Regulations. The registered beneficial holder of deposited shares underlying the ADSs is the depositary
for the ADSs. Accordingly, holders of ADSs will not be able to assert shareholders rights.



A holder of shares may choose, at its discretion, to participate in the central clearing system for share certificates under the Law Concerning Central
Clearing of Share Certificates and Other Securities of Japan. Participating shareholders must deposit certificates representing all of the shares to be included in this clearing system with Japan Securities Depository Center. If a holder is not a
participating institution in the Securities Center, it must participate through a participating institution, such as a securities company or bank having a clearing account with the Securities Center. All shares deposited with the center will be
registered in the name of the Securities Center on our register of shareholders. Each participating shareholder will in turn be registered on our register of beneficial shareholders and be treated in the same way as shareholders registered on our
register of shareholders. For the purpose of transferring deposited shares, delivery of share certificates is not required. Entry of the share transfer in the books maintained by the Securities Center for participating institutions, or in the book
maintained by a participating institution for its customers, has the same effect as delivery of share certificates. The Securities Center system is intended to reduce paperwork required in connection with transfers of shares. Beneficial owners may
at any time withdraw their shares from deposit and receive share certificates.



In view of the globalization of securities trading, the Government of Japan is seeking to enhance the safety, efficiency and convenience of the clearing system for securities in Japan. For this purpose, a series of
laws has been enacted to establish a unified clearing system for various types of securities and to eliminate certificates representing securities to be traded through this system. A new law to incorporate shares of stock into this paperless
clearing system was promulgated on June 9, 2004 and will come into force and effect on a date, to be designated by a cabinet ordinance, which will occur within five years from the date of promulgation. On this effective date, the
paperless clearing system is expected to become compulsorily applicable to the shares of all listed companies in Japan. On the same date, all share certificates issued by listed companies will become void and the Japan Securities Depository Center
clearing system will terminate, but measures will be taken to ensure a smooth transition to the paperless clearing system with respect to all shares, whether the share certificates are then in the possession of shareholders or the Japan Securities
Depository Center.



- 47 -



---

The paperless clearing system will be operated by a clearing organization (which may be the same entity
as the Japan Securities Depository Center), and certain institutions, typically securities companies, will participate in the system directly or indirectly through other participating institutions. Following the application of the paperless clearing
system to the shares of all listed companies, shareholders of each listed company will be recorded in such companys register of shareholders. The register of shareholders will be updated at each record date for determining shareholders
entitled to dividends and voting rights, and at any other date that may be designated by the company, based on information provided to the company by the clearing organization. Transfer of shares will be effected by book-entry in accounts maintained
by the transferor and the transferee at participating institutions. This paperless clearing system is not yet applicable to shares of listed companies as of the date hereof.



DIVIDENDS



Under our Articles of Incorporation, our financial accounts will be closed on December 31 of each year and dividends, if any, will be paid to
shareholders of record at December 31. In addition to year-end dividends, the Board of Directors may by resolution declare an interim cash dividend to shareholders of record as of June 30 of each year.



Under the Company Law, distribution of dividends will take the form of a
distribution of Surplus (as defined below). A company will be permitted to make distributions of Surplus to its shareholders any number of times per fiscal year pursuant to resolutions of its general meeting of shareholders, and to make an interim
cash dividend pursuant to the provisions of its Articles of Incorporation (however, our Articles of Incorporation does not include such provisions.) and the relevant resolution of its Board of Directors, subject to certain limitations described
below. Distributions of Surplus will be required in principle to be authorized by a resolution of a general meeting of shareholders.



Under the Company Law, when a company makes a distribution of Surplus, it must set aside in its additional paid-in capital or legal reserve, an amount
equal to one-tenth of the amount of Surplus so distributed, as required by an ordinance of the Ministry of Justice. The amount of surplus (the Surplus) at any given time shall be calculated in accordance with the following formula:



A + B + C + D  [E + F + G]



In the above formula:



| | A = | the total amount of (a) assets and (b) the book value of treasury stock less the total amount of (v) liabilities, (w) stated capital, (x) additional paid-in
capital, (y) legal reserve and (z) certain other amounts set forth in an ordinance of the Ministry of Justice, each such amount being that which appears on the companys non-consolidated balance sheet as at the end of the last fiscal
year
| | ----- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | B = | if the company has disposed of its treasury stock after the end of the last fiscal year, the amount of the consideration for such treasury stock received by the company, less the
book value thereof
| | ----- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | C = | if the company has reduced its stated capital after the end of the last fiscal year, the amount of such reduction, less the portion thereof, that has been transferred to additional
paid-in capital or legal reserve (if any)
| | ----- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | D = | if the company has reduced its additional paid-in capital or legal reserve after the end of the last fiscal year, the amount of such reduction, less the portion thereof, that has
been transferred to stated capital (if any)
| | ----- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | E = | if the company has cancelled its treasury stock after the end of the last fiscal year, the book value of such treasury stock
| | ----- | ----------------------------------------------------------------------------------------------------------------------------



| | F = | if the company has distributed Surplus to its shareholders after the end of the last fiscal year, the total book value of the Surplus so distributed
| | ----- | ----------------------------------------------------------------------------------------------------------------------------------------------------



| | G = | certain other amounts set forth in an ordinance of the Ministry of Justice
| | ----- | --------------------------------------------------------------------------



Under the Company Law, the aggregate book value of Surplus distributed by the company may not exceed a prescribed distributable amount (the
Distributable Amount), as calculated on the effective date of such distribution. The Distributable Amount of the company at any given time shall be the amount of Surplus less the aggregate of (a) the book value of its treasury
stock, (b) the amount of consideration for any of its treasury stock disposed of by it after the end of the last fiscal year and (c) certain other amounts set forth in an ordinance of the Ministry of Justice.



- 48 -



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JAPANESE UNIT SHARE SYSTEM



In accordance with the requirements of the Company Law, our Articles of Incorporation provide that 500 shares constitute one
unit. Under the Company Law and ordinance of the Ministry of Justice, the upper limit of the number of shares constituting a unit is permitted to be 1,000 shares. The unit share system does not affect the transferability of ADSs, which
may be transferred in lots of any size.



Under the Company Law
and the Deposit Agreement, holders of ADSs will be able to surrender ADSs and withdraw the underlying shares from deposit only in whole unit lots of one unit or larger. A holder who owns ADRs evidencing less than 500 ADSs will indirectly own less
than a whole unit. Such a holder will not be able to dispose of its shares in lots of less than one unit and will not have access to the Japanese market through surrender of their ADSs and withdrawal and sale in Japan of the underlying shares. The
Japanese unit share system does not affect the transferability of ADSs, which may be transferred in lots of any size.



A holder of shares representing less than one unit may at any time require us to purchase such shares. Such shares will be purchased at their last
reported sale price on the First Section of the Tokyo Stock Exchange on the day a request pertaining to such purchase is delivered to our transfer agent or, if no sales take place on that day, the price at which the next sale of shares is effected
on the First Section of the Tokyo Stock Exchange, less applicable brokerage commissions. However, because holders of ADSs representing less than one unit are not able to withdraw the underlying shares from deposit, such holders will not be able to
exercise this right as a practical matter.



Under the Company
Law, our Articles of Incorporation and our Share Handling Regulations, a holder of shares representing less than one unit has all the rights that a holder of shares representing a full unit of shares; except for the rights:



| |  | to require us to issue share certificates;
|- |  | ------------------------------------------



| |  | to require us to issue replacement certificates for lost, stolen or destroyed share certificates; and
|- |  | -----------------------------------------------------------------------------------------------------



| |  | to vote.
|- |  | --------



A holder of shares representing less than one unit cannot exercise any voting rights pertaining to such shares. In calculating the quorum for various voting purposes, the aggregate number of shares representing less
than one unit will be excluded from the number of outstanding shares. A holder of shares representing one or more whole units will have one vote for each unit held.



GENERAL MEETING OF SHAREHOLDERS



We normally hold our ordinary general meeting of shareholders in March of each year in Tokyo, Japan. In addition, we may hold an extraordinary general
meeting of shareholders whenever necessary by giving at least two weeks advance notice. Under the Company Law, notice of any shareholders meeting must be given to each shareholder having voting rights or, in the case of a non-resident
shareholder, to his resident proxy or mailing address in Japan in accordance with our Share Handling Regulations, at least two weeks prior to the date of the meeting.



Any shareholder holding at least 3% of the total outstanding voting rights for a continuous period of six months or longer
may require the Directors to convene a general meeting of shareholders for a particular purpose by submitting a written request. Unless such meeting is convened promptly or a notice convening the meeting, which is to be held not later than eight
weeks from the day of such demand, is dispatched, the requesting shareholder may, upon obtaining a court approval, convene such meeting.



Any shareholder or group of shareholders holding at least 300 voting rights, or 1% of the total outstanding voting rights, for a continuous period of six
months or longer may propose a matter for consideration at a shareholders meeting by submitting a written request to the Directors at least eight weeks before such meeting.



- 49 -



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VOTING RIGHTS



A shareholder is generally entitled to one vote per unit. In general, under the Company Law, a resolution can be adopted at a general meeting of
shareholders by a majority of the voting rights represented at the meeting. The Company Law and our Articles of Incorporation require a quorum for the election of directors and corporate auditors of not less than one-third of the total number of
outstanding voting rights. Our shareholders are not entitled to cumulative voting in the election of directors. Under the Company Law, a corporate shareholder whose outstanding voting rights are in turn more than one-quarter directly or indirectly
owned by us or who substantially controls our management through the shareholding or for any other reason provided in an ordinance of the Ministry of Justice regarding the Company Law does not have voting rights. Shareholders may exercise their
voting rights through proxies, provided that such proxies are also shareholders who have voting rights. Under the Company Law, a system that allows shareholders who do not attend a meeting of shareholders to exercise their voting rights in writing
must be adopted by any company, the number of whose shareholders (except for shareholders who can not vote on any resolutions at its meeting of shareholders), is no less than 1000. This does not include companies which issue shares listed on any
securities exchange and send letters of procuration to shareholders provided for by the Securities Exchange Law and the Cabinet Office regulations concerning the Securities Exchange Law. A company may adopt a system by which shareholders who do not
attend meetings of shareholders can exercise their voting rights through electromagnetic methods provided for by an ordinance of the Ministry of Justice regarding the Company Law.



The Company Law and our Articles of Incorporation provide that a quorum of not less than one-third of outstanding voting
rights must be present at a shareholders meeting and the approval of at least two-thirds of the voting rights represented at the meeting is required for adopting a special resolution. Matters requiring a special resolution include:



| |  | amendment of the Articles of Incorporation;
|- |  | -------------------------------------------



| |  | the removal of a corporate auditor;
|- |  | -----------------------------------



| |  | establishment of a 100% parent-subsidiary relationship by way of share exchange or share transfer;
|- |  | --------------------------------------------------------------------------------------------------



| |  | a dissolution, merger or consolidation;
|- |  | ---------------------------------------



| |  | a company split;
|- |  | ----------------



| |  | the transfer of the whole or an important part of our business;
|- |  | ---------------------------------------------------------------



| |  | the taking over of the whole of the business of any other corporation;
|- |  | ----------------------------------------------------------------------



| |  | any issuance of new shares at a specially favorable price (or any issuance of bond with share acquisition right with specially favorable terms or of share
acquisition right with specially favorable terms to persons other than shareholders);
|- |  | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  | the negotiated purchase of treasury shares;
|- |  | -------------------------------------------



| |  | a stock consolidation;
|- |  | ----------------------



| |  | limitation of liabilities of directors and corporate auditors; and,
|- |  | -------------------------------------------------------------------



| |  | a continuing to exist of a company or dormant company.
|- |  | ------------------------------------------------------



Under the Company Law, a distribution by the company of Surplus in kind will require a special resolution of a general meeting of shareholders, if
shareholders are not granted the right to require the company to make such distribution in cash instead of in kind.



The voting rights of holders of ADSs are exercised by the depositary based on instructions from such holders. An agent of the depositary is the record
holder of the underlying shares.



SUBSCRIPTION RIGHTS



Holders of shares have no preemptive rights under our Articles of
Incorporation. Under the Company Law, the Board of Directors may, however, determine that shareholders be given subscription rights in connection with a particular issue of new shares. In this case, such rights must be given on uniform terms to all
shareholders as of a specified record date by at least two weeks prior notice to shareholders of the record date. Individual notice must be given to each of these shareholders at least two weeks prior to the date of expiration of the
subscription rights.



Rights to subscribe for new shares may be
transferable or nontransferable as determined by the Board of Directors. If subscription rights are not transferable, a purported transfer by a shareholder who is not resident in Japan will be enforceable against us and third parties only with our
prior written consent.



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LIQUIDATION RIGHTS



Upon liquidation, the assets remaining after payment of all debts, liquidation expenses and taxes will be distributed among the shareholders in proportion
to the number of shares they own.



LIABILITY TO FURTHER CALLS OR ASSESSMENTS



All of our currently outstanding shares, including shares
represented by the ADSs, are fully paid and nonassessable.



INDEMNIFICATION
OF DIRECTORS



Pursuant to the Company Law and our Articles
of Incorporation, we may, by resolution of our Board of Directors, release the liabilities of any Directors or Executive Officers to us for damages suffered by us due to their acts taken in good faith and without gross negligence, to the extent
permitted by law and our Articles of Incorporation. In addition, we may execute with outside directors agreements that limit their liabilities to us for damages suffered by us due to their acts in good faith and without gross negligence, to the
extent permitted by the laws of Japan and our Articles of Incorporation.



TRANSFER AGENT



Mitsubishi UFJ Trust and
Banking Corporation is the transfer agent for our shares. Mitsubishi UFJ Trust and Banking Corporations office is located at 4-5, Marunouchi 1-chome, Chiyoda-ku, Tokyo, 100-8212 Japan. Mitsubishi UFJ Trust and Banking Corporation, maintains
our register of shareholders and records transfers of record ownership upon presentation of share certificates.



REPURCHASE OF SHARES BY US



The Company Law, in principle, permits us to acquire, hold or dispose of our shares. We may acquire our shares on the First Section of the Tokyo Stock
Exchange on which the shares are traded, through the Japanese stock exchange, if any, on which such shares are listed, by way of tender offer (pursuant to a resolution of a meeting of the Board of Directors, by having been provided for in the
Articles of Incorporation), from a specific party (pursuant to a special resolution of an ordinary general meeting of shareholders) or from our subsidiary (pursuant to a resolution of the Board of Directors). When such acquisition is made by us from
a specific party other than our subsidiary, any shareholder may make a request directly to a director, five days prior to the relevant shareholders meeting, that we acquire the shares held by such shareholder. However, no such right will be
available if the purchase price or any other consideration to be received by the relevant specific shareholder does not exceed the current market price, to be provided for by an ordinance of the Ministry of Justice, of the shares to be purchased
from such shareholder.



We may hold the shares acquired in
compliance with the provisions of the Company Law, and generally, may dispose of or cancel such shares by a resolution of the Board of Directors. Under the Company Law, the total purchase price of shares may not exceed the Distributable Amount, as
defined in -DIVIDENDS.



DAILY PRICE FLUCTUATION LIMITS UNDER
JAPANESE STOCK EXCHANGE RULES



Share prices on Japanese
stock exchanges are determined on a real-time basis by the equilibrium between bids and offers. These exchanges are order-driven markets without specialists or market makers to guide price formation. To prevent excessive volatility, these exchanges
set daily upward and downward price fluctuation limits for each share, based on the previous days closing price. Although transactions may continue at the upward or downward limit price if the limit price is reached on a particular trading
day, no transactions may take place outside these limits. Consequently, an investor wishing to sell at a price above or below the relevant daily limit may not be able to sell his shares at such price on a particular trading day, or at all.



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On May 31, 2006, the closing price of our shares on the Tokyo Stock Exchange was (Yen)3,840 per
share. The following table shows the daily price limit for a stock on the Tokyo Stock Exchange with a closing price of between (Yen)3,000 and (Yen)5,000 per share, as well as the daily price limit if our per share price were to rise to between
(Yen)5,000 and (Yen)10,000, or fall to between (Yen)2,000 and (Yen)3,000. Other daily price limits would apply if our per share price moved to other ranges.



|                                              |  |                              |       |  |  |  |           |  |       |        |  |  |  |       |      
|--------------------------------------------- |  | ---------------------------- | ----- |  |  |  | --------- |  | ----- | ------ |  |  |  | ----- | -----
|Selected Daily Price Limits                   |  | Maximum Daily Price Movement
|Previous Days Closing Price or Special Quote | 
|Over                                          |  | (Yen)                        | 2,000 |  |  |  | Less than |  | (Yen) | 3,000  |  |  |  | (Yen) | 400  
|Over                                          |  |                              | 3,000 |  |  |  | Less than |  |       | 5,000  |  |  |  |       | 500  
|Over                                          |  |                              | 5,000 |  |  |  | Less than |  |       | 10,000 |  |  |  |       | 1,000



For a history of the
trading price of our shares on the Tokyo Stock Exchange, see Item 9.A of this annual report.



C. Material Contracts.



The information required by this item is set forth in Item 4.



D. Exchange Controls.



The Foreign Exchange
and Foreign Trade Law of Japan and the cabinet orders and ministerial ordinances issued under the law govern the acquisition and holding of shares of equity securities of Japanese corporations, including Trend Micro, by exchange non-residents and by
foreign investors.



Exchange non-residents are individuals who
are not resident in Japan and corporations whose principal offices are located outside Japan. Generally, branches and other offices of non-resident corporations located within Japan are regarded as exchange residents of Japan and branches and other
offices of Japanese corporations located outside Japan are regarded as exchange non-residents of Japan.



Foreign investors are defined to be:



| |  | individuals not resident in Japan;
|- |  | ----------------------------------



| |  | corporations which are organized under the laws of foreign countries or whose principal offices are located outside Japan;
|- |  | --------------------------------------------------------------------------------------------------------------------------



| |  | corporations not less than 50% of the voting rights of which are directly or indirectly held by individuals or corporations described above; and
|- |  | ------------------------------------------------------------------------------------------------------------------------------------------------



| |  | a corporation in which a majority of the directors or similar persons having the power of representation are non-resident individuals of Japan.
|- |  | -----------------------------------------------------------------------------------------------------------------------------------------------



In accordance with this amendment, with minor exceptions, all aspects of the
foreign exchange and foreign trade transactions which under the previous law required licensing or other approval or prior notification to the Minister of Finance of Japan now only require reporting of such transactions after they occur. However,
the Minister of Finance of Japan retains the power to impose a licensing requirement for some transactions in limited circumstances.



ACQUISITION OF SHARES



Except as described below, there are no limits under Japanese law on the right of foreign investors to hold or vote our securities. Exchange non-
residents who acquire from an exchange resident of Japan shares of a company, listed on any Japanese stock exchange or whose shares are traded on the Japanese over-the-counter market, are not required to file any notice prior to the acquisition.
Under the Foreign Exchange and Foreign Trade Law the Minister of Finance may in some exceptional circumstances require prior approval for any such acquisition. An exchange resident who transfers shares of a listed company to an exchange non-resident
for value exceeding (Yen)100 million must file a report concerning the transfer of securities with the Minister of Finance within 20 days of the date of such transfer.



If a foreign investor acquires shares of a company listed on any Japanese stock exchange or whose shares are traded on the
Japanese over-the-counter market and as a result of the acquisition, such foreign investor and designated related parties hold 10% or more of the issued shares, the foreign investor must file a report of the acquisition with the Minister of Finance
and other Ministers having jurisdiction over the business of the issuer within 15 days from and including the date of the acquisition. In limited circumstances, including the case of an acquisition of our shares that causes a foreign investors
ownership to reach such percentage, however, a prior notification of the acquisition must be filed with the Minister of Finance and other Ministers having jurisdiction over the business of the issuer. These Ministers may modify or prohibit the
proposed acquisition.



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DIVIDENDS AND PROCEEDS OF SALES



Under the Foreign Exchange and Foreign Trade Law, dividends paid on, and the proceeds of sales in Japan of, shares held by
exchange non-residents may, in general, be converted into any foreign currency and repatriated abroad. The requirements described in Acquisition of Shares above do not apply to the acquisition of shares by non-residents by way of stock
splits.



AMERICAN DEPOSITARY SHARES



The formalities or restrictions referred to under Acquisition of
Shares above do not apply to the deposit of shares by a non-resident of Japan, the issuance of ADRs evidencing the ADSs created by such deposit in exchange therefore and the withdrawal of whole units of underlying shares upon surrender of
ADRs.



REPORTING OF SUBSTANTIAL SHAREHOLDINGS



The Securities and Exchange Law of Japan requires any person who becomes,
beneficially or of record and solely or jointly, a holder of more than 5% of the total issued shares of a company listed on any Japanese stock exchange or whose shares are traded on the Japanese over-the-counter market to file with the Financial
Services Agency within five business days a report concerning such shareholding.



A similar report must also be made in respect of any subsequent change of 1% or more in any such holding. For this purpose, shares issuable to such person upon conversion of convertible securities or exercise of share
subscription warrants are taken into account in determining both the number of shares held by the holder and the issuers total issued share capital. Copies of each such report must also be sent to the issuer of such shares and all Japanese
stock exchanges on which the shares are listed



E. Taxation.



JAPANESE TAXATION



In general, for Japanese tax purposes, owners of ADRs evidencing ADSs will be treated as the owners of the shares
represented by such ADSs, and no Japanese tax will be payable on exchanges of shares for ADSs, and ADSs for shares.



This discussion does not consider the effect of any state, local or national tax laws other than Japanese tax laws that may be applicable to a purchaser
of shares or ADSs. Furthermore, the Convention Between the United States of America and Japan for the Avoidance of Double Taxation and the Prevention of Fiscal Evasion with Respect to Taxes on Income (the Treaty), the laws,
or administrative or judicial interpretation of the Treaty or the laws may change, and the changes may have retroactive effect. We urge you to consult your tax advisors regarding the Japanese and other tax consequences of owning and disposing of
shares and ADSs.



The following summary describes the principal
Japanese tax consequences relating to an investment in our shares or ADSs. This summary applies only to persons or entities which are non-residents of Japan and to non-Japanese corporations without a permanent establishment in Japan to which the
relevant income is attributable.



Generally, Japanese
withholding tax will apply to dividends paid by us to a non-resident of Japan or a non-Japanese corporation. In general, no Japanese tax is payable on stock splits.



Under the Treaty, as currently in force after July 1, 2004, the maximum rate of Japanese withholding tax which may be
imposed on dividends paid to a United States resident or corporation not having a permanent establishment, which is generally a fixed place of business for industrial or commercial activity, in Japan is limited to:



|(1) | 5% of the gross amount of the dividends if the beneficial owner is a company that owns directly or indirectly, on the date on which entitlement to the dividends is determined, at
least 10 % of the voting stock of the company paying the dividends; or
|--- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



|(2) | 10 % of the gross amount of the dividends in all other cases.
|--- | -------------------------------------------------------------



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Notwithstanding the above, Japanese withholding tax shall not be imposed on such dividends if the
beneficial owner of the dividends is:



|(1) | a company that is a resident of the United States that has owned, directly or indirectly through one or more residents of either Japan or the United States, more than 50 % of
the voting stock of the company paying the dividends for the period of twelve months ending on the date on which entitlement to the dividends is determined and that satisfies other conditions; or
|--- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



|(2) | a pension fund that is a resident of the United States, provided that such dividends are not derived from the carrying on of a business, directly or indirectly, by such pension
fund.
|--- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



For purposes of the Treaty, and Japanese
tax law, U.S. holders of ADRs will be treated as the beneficial owners of the shares underlying the ADSs evidenced by the ADRs.



In the absence of any applicable tax treaty, convention or agreement reducing the maximum rate of withholding tax, the rate of Japanese withholding tax
applicable to dividends paid by Japanese corporations to a non-resident or non-Japanese corporation is 20%. Japan has entered into income tax treaties, conventions or agreements, whereby the 20% withholding tax rate is reduced generally to 15% for
portfolio investors. In addition to the United States, countries with which Japan has concluded such treaties, conventions or agreements include Australia, Belgium, Canada, Denmark, Finland, France, Germany, Ireland, Italy, Luxembourg, The
Netherlands, New Zealand, Norway, Singapore, Spain, Sweden, Switzerland and the United Kingdom.



You must file an application for reduced withholding with the Japanese tax authorities through taxpayer to claim the benefits of the reduced withholding
rate on dividends under the Treaty. The application must be filed on or before the day on which the dividend is paid. If you hold ADSs, two application forms must be filed through the depositary, one form before the dividend payment and the other
within eight months after our fiscal year in which the dividend is paid. To claim the reduced rate, you will need to file proof of:



| |  | taxpayer status;
|- |  | ----------------



| |  | residence; and
|- |  | --------------



| |  | beneficial ownership.
|- |  | ---------------------



The depositary may also require you to provide other information. If you do not submit an application for reduced withholding before a dividend is paid,
you may file a claim for refund of the excess tax with the Japanese tax authorities.



Under the Special Taxation Measures Law amended at March 31, 2003, the rate of withholding tax applicable to dividends paid to shareholders other than those holding 5% or more of the total number of issued
shares, by Japanese corporations listed on any Japanese stock exchange or whose shares are traded on the Japanese over-the-counter market, on and after April 1, 2003 is reduced to 15%. Additionally, the above dividends paid on and after
April 1, 2003 are applied to the privilege tax rate of 10%, from April 1, 2004 to March 31 and 7%, January 1, 2004 to March 31, 2008.



You will not have to pay any Japanese tax on a sale of our shares or ADSs. If you make a gift of our shares or die holding
our shares, a person who receives the shares as a gift or inherits the shares may have to pay Japanese gift or inheritance tax.



UNITED STATES FEDERAL INCOME TAXATION



This section describes the material U.S. federal income taxation of the ownership of shares or ADSs by U.S. Holders, as defined below. It applies to you
only if you hold your shares or ADSs as capital assets for tax purposes.



This section is based on the Internal Revenue Code of 1986, as amended (the Code), its legislative history, existing and proposed regulations, published rulings and court decisions, all as currently in
effect, as well as on the Treaty. These laws are subject to change, possibly on a retroactive basis. In addition, this section is based in part upon the representations of the Depositary and the assumption that each obligation in the Deposit
Agreement and any related agreement will be performed in accordance with its terms.



For purposes of the Treaty and the Code, U.S. holders of ADRs will be treated as the owners of the shares underlying the ADSs evidenced by the ADRs. Exchanges of shares for ADRs, and ADRs for shares, generally will
not be subject to U.S. federal income tax. For purposes of this discussion, you are a U.S. holder if you are a beneficial owner of shares or ADSs and you are for United States federal income tax purposes (i) a citizen or resident of the United
States, (ii) a domestic corporation, (iii) an estate whose income is subject to United States federal income tax regardless of its source or (iv) a trust if a United States court can exercise primary supervision over the trusts
administration and one or more United States persons are authorized to control all substantial decisions of the trust.



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This section does not apply to you if you are a member of a special class of holders subject to special
rules, including a dealer in securities, a trader in securities that elects to use a mark-to-market method of accounting for your securities holdings, a tax-exempt organization, a life insurance company, a person liable for alternative minimum tax,
a person that actually or constructively owns 10% or more of the voting stock of Trend Micro, a person that holds shares or ADSs as part of a straddle or a hedging or conversion transaction, or a U.S. holder whose functional currency is not the U.S.
dollar.



This summary is not a comprehensive description of all
the tax considerations that may be relevant with respect to your shares or ADSs. You should consult your own tax advisor regarding the U.S. federal, state and local and other tax consequences of owning and disposing of shares and ADSs in your
particular circumstances.



Taxation of Dividends.



Under the U.S. federal income tax laws, and subject to the passive foreign
investment company (PFIC) rules discussed below, if you are a U.S. holder, the gross amount of any dividend that Trend Micro pays out of its current or accumulated earnings and profits (as determined for U.S. federal income tax purposes)
is subject to United States federal income taxation. You must include any Japanese tax withheld from the dividend payment in this gross amount even though you do not in fact receive it. Dividends paid to a noncorporate U.S. holder in taxable years
beginning before January 1, 2011 that constitute qualified dividend income will be taxable to such holder at a maximum tax rate of 15% provided that the noncorporate U.S. holder holds the shares or ADSs for more than 60 days during the 121-day
period beginning 60 days before the ex-dividend date and meets other holding period requirements. Dividends that Trend Micro pays with respect to the shares or ADSs will generally be qualified dividend income.



The dividend is taxable to you when you, in the case of shares, or the
Depositary, in the case of ADSs, receive the dividend, actually or constructively. The dividend will not be eligible for the dividends-received deduction generally allowed to U.S. corporations in respect of dividends received from other U.S.
corporations. The amount of the dividend distribution that you must include in your income as a U.S. holder will be the U.S. dollar value of the Japanese yen payments made, determined at the spot Japanese yen/U.S. dollar rate on the date of the
dividend distribution, regardless of whether the payment is in fact converted into U.S. dollars. Generally, any gain or loss resulting from currency exchange fluctuations during the period from the date you include the dividend payment in income to
the date you convert the payment into U.S. dollars will be treated as ordinary income or loss and will not be eligible for the special tax rate applicable to qualified dividend income. The gain or loss generally will be income or loss from sources
within the U.S. for foreign tax credit limitation purposes. Distributions in excess of current and accumulated earnings and profits, as determined for U.S. federal income tax purposes, will be treated as a non-taxable return of capital to the extent
of your basis in the shares or ADSs and thereafter as capital gain.



Subject to certain limitations, the Japanese tax withheld in accordance with the Treaty and paid over to Japan will be creditable against your United States federal income tax liability. Special rules apply in determining the foreign tax
credit limitation with respect to dividends that are subject to the maximum 15% tax rate. To the extent a refund of the tax withheld is available to you under Japanese law or under the Treaty, the amount of tax withheld that is refundable will not
be eligible for credit against your United States federal income tax liability. Please see Japanese Taxation, above, for the procedures for obtaining a reduced rate of withholding under a treaty or a tax refund.



Dividends will be income from sources outside the United States, but
dividends paid in taxable years beginning before January 1, 2007 generally will be passive or financial services income and dividends paid in taxable years beginning after December 31, 2006 will, depending on your
circumstances, be passive or general income which is, in either case, treated separately from other types of income for purposes of computing the foreign tax credit allowable to you.



Distributions of additional shares to you with respect to shares or ADSs that
are made as part of a pro rata distribution to all shareholders of Trend Micro generally will not be subject to United States federal income tax.



Taxation of Capital Gains



Subject to the PFIC rules discussed below, if you are a U.S. holder and you sell or otherwise dispose of your shares or ADSs, you will recognize capital
gain or loss for U.S. federal income tax purposes equal to the difference between the U.S. dollar value of the amount that you realize and your tax basis, determined in U.S. dollars, in your shares or ADSs. Capital gain of a noncorporate U.S. holder
that is recognized in taxable years beginning before January 1, 2011 will generally be taxed at a maximum rate of 15% where the holder has a holding period greater than one year. The gain or loss will generally be income or loss from sources
within the U.S. for foreign tax credit limitation purposes.



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PFIC Rules



We believe that shares and ADSs should not be treated as shares of a PFIC for U.S. federal income tax purposes, but this conclusion is a factual
determination that is made annually and thus may be subject to change. Moreover, this determination will be based in part on circumstances that are beyond our control, such as, for example, our market capitalization. If we were to be treated as a
PFIC, unless a U.S. holder elects to be taxed annually on a mark-to-market basis with respect to the shares or ADSs, gain realized on the sale or other disposition of your shares or ADSs would in general not be treated as capital gain. Instead, if
you are a U.S. holder, you would be treated as if you had realized such gain and certain excess distributions ratably over your holding period for the shares or ADSs and would be taxed at the highest tax rate in effect for each such year
to which the gain was allocated, together with an interest charge in respect of the tax attributable to each such year. With certain exceptions, shares or ADSs will be treated as stock in a PFIC if Trend Micro were a PFIC at any time during your
holding period in your shares or ADSs. Dividends that a U.S. holder receives from Trend Micro will not be eligible for the special tax rates applicable to qualified dividend income if Trend Micro is a PFIC either in the taxable year of the
distribution or the preceding taxable year, but instead will be taxable at rates applicable to ordinary income.



F. Dividends and Paying Agents.



Not applicable



G. Statements by Experts.



Not applicable



H. Documents on Display.



We are subject to the informational requirements of the Securities Exchange
Act of 1934 and, in accordance therewith, we file periodic reports and other information with the Securities and Exchange Commission. These reports and other information can be inspected at the public reference room at the Securities and Exchange
Commission at 450 Fifth Street, N.W., Washington, D.C. 20549. You can also obtain copies of such material by mail from the public reference room of the Securities and Exchange Commission at prescribed fees. You may obtain information on the
operation of the Securities and Exchange public reference room by calling the Securities and Exchange Commission in the United States at 1-800-SEC-0330. The Securities and Exchange Commission also maintains a web site at www.sec.gov that contains
reports, proxy statements and other information regarding registrants that file electronically with the Securities and Exchange Commission. As a foreign private issuer, we are exempt from the rules under the Securities Exchange Act of 1934
prescribing the furnishing and content of proxy statements to shareholders.



I. Subsidiary Information.



Not applicable



Item 11. Quantitative and Qualitative Disclosures About Market Risk.



As discussed in Note 18 to the consolidated financial
statements, we have a policy of not utilizing any derivative financial instruments with off-balance sheet risk. The financial instruments other than derivatives as of December 31, 2005 were cash and cash equivalents, time deposits, marketable
debt and equity securities, notes and accounts receivable, trade, notes and account payable, trade and long-term debt. Among these financial instruments, we do not have significant market sensitive instruments with significant exposure to market
risk. When we acquired ipTrend, we acquired two derivative instruments which ipTrend held. One of those instruments has expired during the fiscal year 2004 and the other has also expired at January 2005. At the expiration, we did not suffer any
material losses from those instruments. However, this has not altered our policy of not utilizing derivative financial statements.



Item 12. Description of Securities Other than Equity Securities.



Not applicable



- 56 -



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PART II



Item 13. Defaults, Dividend Arrearages and Delinquencies.



None



Item 14. Material Modifications to the Rights of Security Holders and Use of Proceeds.



None



Item 15. Controls and Procedures.



Our Management, with the participation of our Chief Executive Officer and Chief Financial Officer, evaluated the effectiveness of our disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e)
under the U.S. Securities Exchange Act of 1934) as of December 31, 2005. Based on the evaluation, our Chief Executive Officer and Chief Financial Officer concluded that our disclosure controls and procedures were ineffective as of December 31, 2005
in the light of material weaknesses in internal control over financial reporting that have been identified, as described below.



As a foreign private issuer, the Company is not yet subject to the requirement of Rule 13a-15(c) under the Exchange Act that an issuers management,
with the participation of its principal executive and financial officers, evaluate the effectiveness of its internal control over financial reporting as of the end of each fiscal year. However, in connection with the audit of our consolidated
financial statements for the year ended December 31, 2005, our principal accountant reported to our Board of Corporate Auditors the following material weakness pursuant to AU Section 325, Communication of Internal Control Related Matters Noted in
an Audit, of the American Institute of Certified Public Accountants Professional Standards.



We have restated the pro forma stock compensation disclosures required by FAS 123 as amended by FAS 148 for the fiscal year ended December 31, 2003 and
2004 in order to reflect the corrections in the amortization period, expected life assumption and volatilities used to determine pro forma stock-based compensation expense. Furthermore, in response to a comment received from the staff of the
Securities and Exchange Commission, we have also restated the statements of income for the fiscal year ended December 31, 2003 and 2004 in order to reclassify maintenance costs previously reported as part of research and development and maintenance
cost within operating expenses and customer support expenses also previously included in operating expenses, into cost of sales. Management has determined that these items were indicative of an ineffective financial closing process at the Company as
of December 31, 2005. Management believes that this was the result of (i) an inadequate number of accounting personnel with sufficient technical expertise in the area of U.S. GAAP and financial reporting at both our corporate headquarters and
foreign subsidiaries, (ii) failure to document with sufficient support the application of our accounting policies, practices and procedures, and (iii) lack of effective preventive and detective controls to properly apply U.S. GAAP in our financial
reporting process. As a result, management has concluded that, as of December 31, 2005 there were deficiencies in the design and execution of our company-level controls that constituted material weaknesses in our internal control over financial
reporting.



During the period covered by this report (fiscal
2005), there were no significant changes in our internal control over financial reporting that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting. During the current fiscal year
(fiscal 2006), as a result of the identification of the material weaknesses noted above, we have been taking a series of steps to strengthen our internal control over financial reporting to remediate these material weaknesses, including enhancing
our internal resources to address U.S. GAAP matters, increasing the levels of review and oversight of our financial statement closing process, and hiring new leading outsourcer for computing stock option expense. With these measures, the management
is seeking to enhance and align the Companys processes and internal controls over financial reporting with the goal to complete the remediation of these material weaknesses by the end of the current fiscal year.



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Item 16A. Audit Committee Financial Expert.



Our Board of Corporate Auditors has determined that we do not have an audit committee financial expert as
defined in Item 16A of Form 20-F serving on the Board of Corporate Auditors. We believe that the combined knowledge, skills and experience of the Board of Corporate Auditors enables them, as a group, to act effectively in the fulfillment of
their tasks and responsibilities, including those under the Sarbanes-Oxley Act of 2002. In addition, the Corporate Auditors have the power and authority to engage outside experts as they deem appropriate to provide them with advice on matters
related to their responsibilities.



Item 16B. Code of Ethics.



We have adopted a code of conduct applicable to all of
our employees, including our Chief Executive Officer, Chief Financial Officer, Group Controller and other senior finance officers. A copy of our code of conduct is attached as an exhibit to this report.



Item 16C. Principal Accountant Fees and Services.



The following table sets forth the aggregate fees billed or to be billed to
us by PricewaterhouseCoopers, our principal accountant, for the following categories of fees from each of the last two fiscal years.



|                      |  |                      |        |             |       |             |  |       |       
|--------------------- |  | -------------------- | ------ | ----------- | ----- | ----------- |  | ----- | ------
|                      |  | Fiscal 2003          |        | Fiscal 2004 |       | Fiscal 2005
|                      |  | (in millions of yen)
|Audit fees            |  | (Yen)                | 83.88  |             | (Yen) | 95.36       |  | (Yen) | 128.95
|Audit-related fees(1) |  |                      | 0.01   |             |       | 5.00        |  |       | 14.97 
|Tax fees(2)           |  |                      | 37.81  |             |       | 28.82       |  |       | 78.53 
|All Other fees(3)     |  |                      | 1.02   |             |       | 1.29        |  |       | 1.65  
|                      |  |                      |        |             |       |             |  |       |       
|Total Fees            |  | (Yen)                | 122.71 |             | (Yen) | 130.47      |  | (Yen) | 224.11
|                      |  |                      |        |             |       |             |  |       |       



|(1) | Audit-related fees include fees relating to advisory services relating to Section 404 of the Sarbanes-Oxley Act.
|--- | ----------------------------------------------------------------------------------------------------------------

|(2) | Tax fees consist of fees relating to tax compliance, tax advice and tax planning services.
|--- | ------------------------------------------------------------------------------------------

|(3) | All Other fees include fees relating to updates of U.S. GAAP and SEC regulations to the Board of Corporate Auditors.
|--- | --------------------------------------------------------------------------------------------------------------------



Our Board of Corporate Auditors has adopted guidelines for pre-approving all
audit and non-audit services performed by our principal accountant and its affiliates in accordance with Rule 2-01(c)(7)(i)(A) under Regulation S-X. Under those guidelines, the Board of Corporate Auditors must pre-approve individual audit and
non-audit services before they are provided by our principal accountant and its affiliates to us. Those guidelines also describe prohibited services that may never be provided. Our Board of Corporate Auditors does not use the provisions of Rule
2-01(c)(7)(i)(B) under Regulation S-X for pre-approving audit and non-audit services.



None of the services described above in this Item 16C were waived from the pre-approval requirements pursuant to Rule 2-01(c)(7)(i)(C) of Regulation S-X.



Item 16D. Exemptions from the Listing Standards for
Audit Committees.



With respect to the requirements of
Rule 10A-3 under the Securities Exchange Act of 1934 relating to listed company audit committees, which apply to us through Rules 4350(d)(3) and 4350(d)(2)(A)(ii) of the NASD Manual, we rely on an exemption provided by paragraph (c)(3) of that Rule
available to foreign private issuers with boards of corporate auditors meeting certain requirements. For a NASDAQ-listed Japanese company with a board of corporate auditors, the requirements for relying on paragraph (c)(3) of Rule 10A-3 are as
follows:



| | (a) | The board of corporate auditors must be established, and its members must be selected, pursuant to Japanese law expressly requiring such a board for Japanese companies that elect to
have a corporate governance system with corporate auditors.
| | --- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



- 58 -



---

| | (b) | Japanese law must and does require the board of corporate auditors to be separate from the board of directors.
| | --- | --------------------------------------------------------------------------------------------------------------



| | (c) | None of the members of the board of corporate auditors is elected by management, and none of the listed companys executive officers is a member of the board of corporate
auditors.
| | --- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | (d) | Japanese law must and does set forth standards for the independence of the members of the board of corporate auditors from the listed company or its management.
| | --- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------



| | (e) | The board of corporate auditors, in accordance with Japanese law or the listed companys governing documents, must be responsible, to the extent permitted by Japanese law, for
the appointment, retention and oversight of the work of any registered public accounting firm engaged (including, to the extent permitted by Japanese law, the resolution of disagreements between management and the auditor regarding financial
reporting) for the purpose of preparing or issuing an audit report or performing other audit, review or attest services for the listed company, including its principal accountant which audits its consolidated financial statements included in its
annual reports on Form 20-F.
| | --- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | (f) | To the extent permitted by Japanese law:
| | --- | ----------------------------------------



| |  |  | the board of corporate auditors must establish procedures for (i) the receipt, retention and treatment of complaints received by us regarding accounting, internal accounting
controls, or auditing matters, and (ii) the confidential, anonymous submission by our employees of concerns regarding questionable accounting or auditing matters;
| | - |  | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | the board of corporate auditors must have the authority to engage independent counsel and other advisers, as it determines necessary to carry out its duties; and
| | - |  | -----------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | the listed company must provide for appropriate funding, as determined by its board of corporate auditors, for payment of (i) compensation to any registered public accounting
firm engaged for the purpose of preparing or issuing an audit report or performing other audit, review or attest services for us, (ii) compensation to any advisers employed by the board of corporate auditors, and (iii) ordinary
administrative expenses of the board of corporate auditors that are necessary or appropriate in carrying out its duties.
| | - |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



In our assessment, our Board of Corporate Auditors, which meets the requirements for reliance on the exemption in paragraph (c)(3) of Rule 10A-3 described above, is not
materially less effective than an audit committee meeting all the requirements of paragraph (b) of Rule 10A-3 (without relying on any exemption provided by that Rule) at acting independently of management and performing the functions of an
audit committee as contemplated therein.



Item 16E. Purchases of Equity
Securities by the Issuer and Affiliated Purchasers.



The following table
sets forth certain information with respect to purchases we made of our shares during the year ended December 31, 2005.



|                                  |  |                            |  |                                  |  |                                                                                      |  |                                                                                   
|--------------------------------- |  | -------------------------- |  | -------------------------------- |  | ------------------------------------------------------------------------------------ |  | ----------------------------------------------------------------------------------
|Period                            |  | (a) Total Number of Shares |  | (b) Average Price Paid per Share |  | (c) Total Number of Shares Purchased as Part of Publicly Announced Plans or
Programs |  | (d) Maximum Number of Shares that May Yet Be Purchased Under the Plans
or Programs
|                                  |  |                            |  |                                 
|January 1 to January 31, 2005     |  | 2,089 (Shares)             |  | 5,083 (Yen)                      |  | - (Shares)                                                                           |  | - (Shares)                                                                        
|                                  |  |                            |  |                                 
|February 1 to February 28, 2005   |  | 1,635 (Shares)             |  | 4,652 (Yen)                      |  | - (Shares)                                                                           |  | - (Shares)                                                                        
|                                  |  |                            |  |                                 
|March 1 to March 31, 2005         |  | 1,761 (Shares)             |  | 4,840 (Yen)                      |  | - (Shares)                                                                           |  | - (Shares)                                                                        
|                                  |  |                            |  |                                 
|April 1 to April 30, 2005         |  | 3,036 (Shares)             |  | 4,331 (Yen)                      |  | - (Shares)                                                                           |  | - (Shares)                                                                        
|                                  |  |                            |  |                                 
|May 1 to May 31, 2005             |  | 500 (Shares)               |  | 3,820 (Yen)                      |  | - (Shares)                                                                           |  | - (Shares)                                                                        
|                                  |  |                            |  |                                 
|June 1 to June 30, 2005           |  | 228 (Shares)               |  | 3,616 (Yen)                      |  | - (Shares)                                                                           |  | - (Shares)                                                                        
|                                  |  |                            |  |                                 
|July 1 to July 31, 2005           |  | 2,290 (Shares)             |  | 3,908 (Yen)                      |  | - (Shares)                                                                           |  | - (Shares)                                                                        
|                                  |  |                            |  |                                 
|August 1 to August 31, 2005       |  | 1,761 (Shares)             |  | 3,933 (Yen)                      |  | - (Shares)                                                                           |  | - (Shares)                                                                        
|                                  |  |                            |  |                                 
|September 1 to September 30, 2005 |  | 1,561 (Shares)             |  | 3,921 (Yen)                      |  | - (Shares)                                                                           |  | - (Shares)                                                                        
|                                  |  |                            |  |                                 
|October 1 to October 31, 2005     |  | 289 (Shares)               |  | 3,560 (Yen)                      |  | - (Shares)                                                                           |  | - (Shares)                                                                        
|                                  |  |                            |  |                                 
|November 1 to November 30, 2005   |  | 8,722 (Shares)             |  | 4,144 (Yen)                      |  | - (Shares)                                                                           |  | - (Shares)                                                                        
|                                  |  |                            |  |                                 
|December 1 to December 31, 2005   |  | 9,920 (Shares)             |  | 4,059 (Yen)                      |  | - (Shares)                                                                           |  | - (Shares)                                                                        
|                                  |  |                            |  |                                 
|Total                             |  | 33,792 (Shares)            |  | 4,204 (Yen)                      |  | - (Shares)                                                                           |  | - (Shares)                                                                        



- 59 -



---

Footnotes:

|a. | The date each plan or program was announced: None.
|-- | --------------------------------------------------

|b. | The share amount approved: None.
|-- | --------------------------------

|c. | The expiration date of each plan or program: None.
|-- | --------------------------------------------------

|d. | Each plan or program that expired during the period covered by the table: The plan referred to in note a. above.
|-- | ----------------------------------------------------------------------------------------------------------------

|e. | Each plan or program the issuer has determined to terminate prior to expiration, or under which the issuer does not intend to make further purchases: None.
|-- | -----------------------------------------------------------------------------------------------------------------------------------------------------------



PART III



Item 17. Financial Statements.



In lieu of responding to this item, we have responded to Item 18 of
this annual report.



Item 18. Financial Statements.



The information required by this item is set forth beginning on page F-2 of
this annual report.



- 60 -



---

Item 19. Exhibits.



Exhibits



|              |  |                                                                                                                                                                                                                
|------------- |  | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|ExhibitNumber |  | Document                                                                                                                                                                                                       
|1.1           |  | Articles of Incorporation of Trend Micro (English translation)                                                                                                                                                 
|              | 
|1.2           |  | Share Handling Regulations of Trend Micro, as amended (English translation)                                                                                                                                    
|              | 
|1.3           |  | Regulations of the Board of Directors of Trend Micro, as amended (English translation)                                                                                                                         
|              | 
|1.4           |  | Regulations of the Board of Corporate Auditors of Trend Micro, as amended (English translation)                                                                                                                
|              | 
|2.1***        |  | Specimen Common Stock Certificates                                                                                                                                                                             
|              | 
|2.2****       |  | Form of Deposit Agreement among Trend Micro, The Bank of New York as depositary and all owners and holders from time to time of American Depositary Receipts, including the form of American
Depositary Receipt
|              | 
|4.1***** +    |  | Basic Agreement on Continual Sale and Purchase of Goods dated October 1, 1999, between Trend Micro Incorporated and SOFTBANK BB (formerly known as SOFTBANK COMMERCE CORP.), and related
agreements            
|              | 
|4.2*          |  | Limited Liability Agreement dated April 21, 2005, between Trend Micro Incorporated and Hirotaka Takeuchi                                                                                                       
|              | 
|8.1           |  | List of subsidiaries of Trend Micro                                                                                                                                                                            
|              | 
|11.1**        |  | Code of Conduct                                                                                                                                                                                                
|              | 
|12.1          |  | Certification of the principal executive officer of Trend Micro required by Rule 13a-14(a)                                                                                                                     
|              | 
|12.2          |  | Certification of the principal financial officer of Trend Micro required by Rule 13a-14(a)                                                                                                                     
|              | 
|13.1          |  | Certification of the chief executive officer required by Rule 13a-14(b) and Section 1350 of Chapter 63 of Title 18 of the United States Code                                                                   
|              | 
|13.2          |  | Certification of the chief financial officer required by Rule 13a-14(b) and Section 1350 of Chapter 63 of Title 18 of the United States Code                                                                   
|              | 
|15.1          |  | Consent of Independent Registered Public Accounting Firm                                                                                                                                                       

---

|* | Incorporated by reference to the corresponding exhibit to our annual report of Form 20-F (File No. 333-10486) filed on June 30, 2005.
|- | -------------------------------------------------------------------------------------------------------------------------------------

|** | Incorporated by reference to the corresponding exhibit to our annual report of Form 20-F (File No. 333-10486) filed on June 1, 2004.
|-- | ------------------------------------------------------------------------------------------------------------------------------------

|*** | Incorporated by reference to the corresponding exhibit to our annual report on Form 20-F (File No. 333-10486) filed on June 29, 2001.
|--- | -------------------------------------------------------------------------------------------------------------------------------------

|**** | Incorporated by reference to the corresponding exhibit to our Amendment No. 1 to Registration Statement on Form F-6 (File No. 333-10492) filed on June 22, 2001.
|---- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------

|***** | Incorporated by reference to the corresponding exhibit to our Amendment No. 2 to the Form F-1 Registration Statement (File No. 333-10568) filed on May 22, 2000.
|----- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------

|+ | Confidential treatment granted for a portion of these documents.
|- | ----------------------------------------------------------------



We have not included as exhibits certain instruments with respect to our long-term debt, the amount of debt authorized under each of which does not exceed
10% of our total assets, and we agree to furnish a copy of any such instrument to the Securities and Exchange Commission upon request.



- 61 -



---

TREND MICRO INCORPORATED

AND CONSOLIDATED SUBSIDIARIES



INDEX TO CONSOLIDATED FINANCIAL STATEMENTS



|                                                                                                     |  |     
|---------------------------------------------------------------------------------------------------- |  | ----
|                                                                                                     |  | Page
|                                                                                                     | 
|Report of independent registered public accounting firm.                                             |  | F-2 
|                                                                                                     | 
|Consolidated balance sheets at December 31, 2004 and 2005.                                           |  | F-3 
|                                                                                                     | 
|Consolidated statements of income for the years ended December 31, 2003, 2004 and 2005               |  | F-5 
|                                                                                                     | 
|Consolidated statements of comprehensive income for the years ended December 31, 2003, 2004 and 2005 |  | F-6 
|                                                                                                     | 
|Consolidated statements of shareholders equity for the years ended December 31, 2003, 2004 and 2005 |  | F-7 
|                                                                                                     | 
|Consolidated statements of cash flows for the years ended December 31, 2003, 2004 and 2005           |  | F-9 
|                                                                                                     | 
|Notes to consolidated financial statements                                                           |  | F-11
|                                                                                                     | 
|Financial statement schedule for the years ended December 31, 2003, 2004 and 2005:                   |  |     
|                                                                                                     | 
|Schedule IIValuation and qualifying accounts.                                                       |  | F-37



All other schedules are omitted
because they are not applicable or the required information is shown in the financial statements or the notes thereto.



F-1



---

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM



To the Shareholders and Board of Directors of

Trend Micro Kabushiki Kaisha

(Trend Micro Incorporated):



In our
opinion, the consolidated financial statements listed in the accompanying index present fairly, in all material respects, the financial position of Trend Micro Incorporated and its subsidiaries at December 31, 2004 and 2005, and the results of
their operations and their cash flows for each of the three years in the period ended December 31, 2005 in conformity with accounting principles generally accepted in the United States of America. In addition, in our opinion, the financial
statement schedule listed in the accompanying index presents fairly, in all material respects, the information set forth therein when read in conjunction with the related consolidated financial statements. These financial statements and financial
statement schedule are the responsibility of the Companys management. Our responsibility is to express an opinion on these financial statements and financial statement schedule based on our audits. We conducted our audits of these statements
in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material
misstatement. An audit includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements, assessing the accounting principles used and significant estimates made by management, and evaluating the
overall financial statement presentation. We believe that our audits provide a reasonable basis for our opinion.



As described in Note 2 to the consolidated financial statements, the Company restated its consolidated financial statements for the years ended December 31, 2004 and
2003.



/s/ ChuoAoyama PricewaterhouseCoopers



Tokyo, Japan

June 28, 2006



F-2



---

TREND MICRO INCORPORATED

AND CONSOLIDATED SUBSIDIARIES



CONSOLIDATED BALANCE SHEETS



|                                                                                                        |  |                  |   |  |                           |   |  |      |           |  
|------------------------------------------------------------------------------------------------------- |  | ---------------- | - |  | ------------------------- | - |  | ---- | --------- | -
|                                                                                                        |  | December 31,     |   |  | December 31,              |  
|                                                                                                        |  | 2004             |   |  | 2005                      |   |  | 2005 |          
|                                                                                                        |  | Thousands of yen |   |  | Thousands of U.S. dollars |  
|ASSETS                                                                                                  |  |                  |   |  |                           |   |  |      |           |  
|Current assets:                                                                                         |  |                  |   |  |                           |   |  |      |           |  
|Cash and cash equivalents                                                                               |  | (Yen)52,908,357  |   |  | (Yen)59,612,577           |   |  | $    | 505,191   |  
|Time deposits                                                                                           |  | 383,276          |   |  | 1,435,293                 |   |  |      | 12,164    |  
|Marketable securities                                                                                   |  | 15,288,575       |   |  | 22,395,365                |   |  |      | 189,791   |  
|Notes and accounts receivable, trade                                                                    |  |                  |   |  |                           |   |  |      |           |  
|less allowance for doubtful accounts of (Yen) 292,815 and (Yen) 282,257 in 2004 and 2005, respectively |  |                  |   |  |                           |   |  |      |           |  
|less sales return allowance of (Yen) 572,123 and (Yen) 422,453 in 2004 and 2005, respectively          |  | 15,245,213       |   |  | 19,198,870                |   |  |      | 162,702   |  
|Inventories                                                                                             |  | 201,243          |   |  | 359,897                   |   |  |      | 3,050     |  
|Deferred income taxes                                                                                   |  | 6,224,972        |   |  | 6,727,229                 |   |  |      | 57,010    |  
|Prepaid expenses and other current assets                                                               |  | 1,560,058        |   |  | 1,925,791                 |   |  |      | 16,321    |  
|                                                                                                        |  |                  |   |  |                           |   |  |      |           |  
|Total current assets                                                                                    |  | 91,811,694       |   |  | 111,655,022               |   |  |      | 946,229   |  
|                                                                                                        |  |                  |   |  |                           |   |  |      |           |  
|Investments and other assets:                                                                           |  |                  |   |  |                           |   |  |      |           |  
|Securities investments                                                                                  |  | 9,831,913        |   |  | 11,159,428                |   |  |      | 94,571    |  
|Investment in and advances to affiliate companies                                                       |  | 175,281          |   |  | 321,569                   |   |  |      | 2,725     |  
|Software development costs                                                                              |  | 438,464          |   |  | 1,174,691                 |   |  |      | 9,955     |  
|Other intangibles                                                                                       |  | 296,368          |   |  | 1,390,434                 |   |  |      | 11,784    |  
|Goodwill                                                                                                |  |                 |   |  | 2,130,179                 |   |  |      | 18,053    |  
|Deferred income taxes                                                                                   |  | 1,695,771        |   |  | 2,033,488                 |   |  |      | 17,233    |  
|Other                                                                                                   |  | 636,009          |   |  | 671,800                   |   |  |      | 5,693     |  
|                                                                                                        |  |                  |   |  |                           |   |  |      |           |  
|Total investments and other assets                                                                      |  | 13,073,806       |   |  | 18,881,589                |   |  |      | 160,014   |  
|                                                                                                        |  |                  |   |  |                           |   |  |      |           |  
|Property and equipment:                                                                                 |  |                  |   |  |                           |   |  |      |           |  
|Office furniture and equipment                                                                          |  | 3,323,526        |   |  | 4,468,891                 |   |  |      | 37,872    |  
|Other properties                                                                                        |  | 1,165,173        |   |  | 1,539,195                 |   |  |      | 13,044    |  
|                                                                                                        |  |                  |   |  |                           |   |  |      |           |  
|                                                                                                        |  | 4,488,699        |   |  | 6,008,086                 |   |  |      | 50,916    |  
|Less: Accumulated depreciation                                                                          |  | (2,640,288       | ) |  | (3,609,473                | ) |  |      | (30,589   | )
|                                                                                                        |  |                  |   |  |                           |   |  |      |           |  
|Total property and equipment                                                                            |  | 1,848,411        |   |  | 2,398,613                 |   |  |      | 20,327    |  
|                                                                                                        |  |                  |   |  |                           |   |  |      |           |  
|Total assets                                                                                            |  | (Yen)106,733,911 |   |  | (Yen)132,935,224          |   |  | $    | 1,126,570 |  
|                                                                                                        |  |                  |   |  |                           |   |  |      |           |  



The accompanying notes
are an integral part of these statements.



F-3



---

TREND MICRO INCORPORATED

AND CONSOLIDATED SUBSIDIARIES



CONSOLIDATED BALANCE SHEETS



|                                                                       |  |                  |   |  |                           |   |  |      |           |  
|---------------------------------------------------------------------- |  | ---------------- | - |  | ------------------------- | - |  | ---- | --------- | -
|                                                                       |  | December 31,     |   |  | December 31,              |  
|                                                                       |  | 2004             |   |  | 2005                      |   |  | 2005 |          
|                                                                       |  | Thousands of yen |   |  | Thousands of U.S. dollars |  
|LIABILITIES AND SHAREHOLDERS EQUITY                                   |  |                  |   |  |                           |   |  |      |           |  
|Current liabilities:                                                   |  |                  |   |  |                           |   |  |      |           |  
|Notes payable, trade                                                   |  | 88,087           |   |  | 118,572                   |   |  |      | 1,005     |  
|Accounts payable, trade                                                |  | 1,271,067        |   |  | 794,450                   |   |  |      | 6,733     |  
|Accounts payable, other                                                |  | 2,699,762        |   |  | 3,208,625                 |   |  |      | 27,192    |  
|Withholding income taxes                                               |  | 882,693          |   |  | 1,082,302                 |   |  |      | 9,172     |  
|Accrued expenses                                                       |  | 2,143,694        |   |  | 3,138,674                 |   |  |      | 26,599    |  
|Accrued income and other taxes                                         |  | 7,192,085        |   |  | 5,476,791                 |   |  |      | 46,413    |  
|Deferred revenue                                                       |  | 24,634,662       |   |  | 31,506,315                |   |  |      | 267,003   |  
|Other                                                                  |  | 651,503          |   |  | 895,088                   |   |  |      | 7,585     |  
|                                                                       |  |                  |   |  |                           |   |  |      |           |  
|Total current liabilities                                              |  | 39,563,553       |   |  | 46,220,817                |   |  |      | 391,702   |  
|                                                                       |  |                  |   |  |                           |   |  |      |           |  
|Long-term liabilities:                                                 |  |                  |   |  |                           |   |  |      |           |  
|Deferred revenue                                                       |  | 3,268,892        |   |  | 3,874,936                 |   |  |      | 32,838    |  
|Accrued pension and severance costs                                    |  | 656,041          |   |  | 889,774                   |   |  |      | 7,540     |  
|Other                                                                  |  | 70,665           |   |  | 82,056                    |   |  |      | 696       |  
|                                                                       |  |                  |   |  |                           |   |  |      |           |  
|Total long-term liabilities                                            |  | 3,995,598        |   |  | 4,846,766                 |   |  |      | 41,074    |  
|                                                                       |  |                  |   |  |                           |   |  |      |           |  
|Minority Interest                                                      |  |                 |   |  | 4,531                     |   |  |      | 39        |  
|Shareholders equity:                                                  |  |                  |   |  |                           |   |  |      |           |  
|Common stock                                                           |  |                  |   |  |                           |   |  |      |           |  
|Authorized                                                             |  |                  |   |  |                           |   |  |      |           |  
|2004 and 2005 250,000,000 shares (no par value)                       |  |                  |   |  |                           |   |  |      |           |  
|Issued                                                                 |  |                  |   |  |                           |   |  |      |           |  
|2004 135,755,872 shares                                               |  | 11,426,977       |   |  |                           |   |  |      |           |  
|2005 136,603,725 shares                                               |  |                  |   |  | 12,484,849                |   |  |      | 105,804   |  
|Additional paid-in capital                                             |  | 17,359,335       |   |  | 18,572,063                |   |  |      | 157,390   |  
|Retained earnings                                                      |  | 42,165,026       |   |  | 55,971,955                |   |  |      | 474,338   |  
|Accumulated other comprehensive income                                |  |                  |   |  |                           |   |  |      |           |  
|Net unrealized gain on debt and equity securities                      |  | 284,348          |   |  | 657,885                   |   |  |      | 5,576     |  
|Cumulative translation adjustments                                     |  | (606,463         | ) |  | 1,459,600                 |   |  |      | 12,369    |  
|                                                                       |  |                  |   |  |                           |   |  |      |           |  
|                                                                       |  | (322,115         | ) |  | 2,117,485                 |   |  |      | 17,945    |  
|                                                                       |  |                  |   |  |                           |   |  |      |           |  
|Treasury stock, at cost (2004-2,588,439 shares; 2005-2,513,231 shares) |  | (7,454,463       | ) |  | (7,283,242                | ) |  |      | (61,722   | )
|                                                                       |  |                  |   |  |                           |   |  |      |           |  
|Total shareholders equity                                             |  | 63,174,760       |   |  | 81,863,110                |   |  |      | 693,755   |  
|                                                                       |  |                  |   |  |                           |   |  |      |           |  
|Commitments and contingent liabilities                                 |  |                  |   |  |                           |   |  |      |           |  
|Total liabilities, minority interest and shareholders equity          |  | (Yen)106,733,911 |   |  | (Yen)132,935,224          |   |  | $    | 1,126,570 |  
|                                                                       |  |                  |   |  |                           |   |  |      |           |  



The accompany notes are
an integral part of these statements.



F-4



---

TREND MICRO INCORPORATED

AND CONSOLIDATED SUBSIDIARIES



CONSOLIDATED STATEMENTS OF INCOME



|                                                                               |  |                          |   |  |                             |   |  |                 |   |  |                          |         |  
|------------------------------------------------------------------------------ |  | ------------------------ | - |  | --------------------------- | - |  | --------------- | - |  | ------------------------ | ------- | -
|                                                                               |  | Years ended December 31, |   |  | Year endedDecember 31,      |  
|                                                                               |  | 2003                     |   |  | 2004                        |   |  | 2005            |   |  | 2005                     |        
|                                                                               |  | (restated)               |   |  | (restated) Thousands of yen |   |  |                 |   |  | Thousands ofU.S. dollars |        
|Net sales                                                                      |  | (Yen)48,088,347          |   |  | (Yen)62,049,254             |   |  | (Yen)73,029,901 |   |  | $                        | 618,897 |  
|Cost of sales                                                                  |  |                          |   |  |                             |   |  |                 |   |  |                          |         |  
|Amortization of capitalized software, and Materials                            |  | 3,168,467                |   |  | 3,236,499                   |   |  | 2,598,603       |   |  |                          | 22,022  |  
|Maintenance                                                                    |  | 2,193,624                |   |  | 2,260,934                   |   |  | 1,671,320       |   |  |                          | 14,163  |  
|Customer Support                                                               |  | 4,830,660                |   |  | 5,723,426                   |   |  | 6,857,901       |   |  |                          | 58,118  |  
|                                                                               |  |                          |   |  |                             |   |  |                 |   |  |                          |         |  
|Total Cost of sales                                                            |  | 10,192,751               |   |  | 11,220,859                  |   |  | 11,127,824      |   |  |                          | 94,303  |  
|                                                                               |  |                          |   |  |                             |   |  |                 |   |  |                          |         |  
|Operating expenses:                                                            |  |                          |   |  |                             |   |  |                 |   |  |                          |         |  
|Selling                                                                        |  | 15,360,532               |   |  | 16,009,409                  |   |  | 20,944,484      |   |  |                          | 177,496 |  
|Research and development                                                       |  | 1,725,400                |   |  | 2,597,325                   |   |  | 4,395,207       |   |  |                          | 37,247  |  
|General and administrative                                                     |  | 5,656,168                |   |  | 6,143,985                   |   |  | 8,990,611       |   |  |                          | 76,192  |  
|                                                                               |  |                          |   |  |                             |   |  |                 |   |  |                          |         |  
|Total operating expenses                                                       |  | 22,742,100               |   |  | 24,750,719                  |   |  | 34,330,302      |   |  |                          | 290,935 |  
|                                                                               |  |                          |   |  |                             |   |  |                 |   |  |                          |         |  
|Operating income                                                               |  | 15,153,496               |   |  | 26,077,676                  |   |  | 27,571,775      |   |  |                          | 233,659 |  
|                                                                               |  |                          |   |  |                             |   |  |                 |   |  |                          |         |  
|Other income (expenses):                                                       |  |                          |   |  |                             |   |  |                 |   |  |                          |         |  
|Interest income                                                                |  | 412,635                  |   |  | 451,217                     |   |  | 836,910         |   |  |                          | 7,092   |  
|Interest expense                                                               |  | (173,830                 | ) |  | (87,464                     | ) |  | (3,709          | ) |  |                          | (31     | )
|Gain (Loss) on sales of marketable securities                                  |  | (65,259                  | ) |  | 101,199                     |   |  | 370,326         |   |  |                          | 3,138   |  
|Impairment loss of securities investments                                      |  | (7,360                   | ) |  |                            |   |  |                |   |  |                          |        |  
|Foreign exchange gain (loss), net                                              |  | 120,650                  |   |  | (183,292                    | ) |  | 327,257         |   |  |                          | 2,774   |  
|Other income (expense), net                                                    |  | (111,345                 | ) |  | (34,350                     | ) |  | 5,741           |   |  |                          | 49      |  
|                                                                               |  |                          |   |  |                             |   |  |                 |   |  |                          |         |  
|Total other income (expenses)                                                  |  | 175,491                  |   |  | 247,310                     |   |  | 1,536,525       |   |  |                          | 13,022  |  
|                                                                               |  |                          |   |  |                             |   |  |                 |   |  |                          |         |  
|Net income before tax                                                          |  | 15,328,987               |   |  | 26,324,986                  |   |  | 29,108,300      |   |  |                          | 246,681 |  
|                                                                               |  |                          |   |  |                             |   |  |                 |   |  |                          |         |  
|Income taxes:                                                                  |  |                          |   |  |                             |   |  |                 |   |  |                          |         |  
|Current                                                                        |  | 7,437,576                |   |  | 11,893,659                  |   |  | 11,863,127      |   |  |                          | 100,535 |  
|Deferred                                                                       |  | (1,334,998               | ) |  | (1,390,387                  | ) |  | (1,358,568      | ) |  |                          | (11,513 | )
|                                                                               |  |                          |   |  |                             |   |  |                 |   |  |                          |         |  
|                                                                               |  | 6,102,578                |   |  | 10,503,272                  |   |  | 10,504,559      |   |  |                          | 89,022  |  
|                                                                               |  |                          |   |  |                             |   |  |                 |   |  |                          |         |  
|Income before minority interest and equity in earnings of affiliated companies |  | 9,226,409                |   |  | 15,821,714                  |   |  | 18,603,741      |   |  |                          | 157,659 |  
|Minority interest in income of consolidated subsidiaries                       |  |                         |   |  |                            |   |  | (338            | ) |  |                          | (3      | )
|Equity in earnings of affiliated companies                                     |  | 23,623                   |   |  | 53,122                      |   |  | 66,551          |   |  |                          | 564     |  
|                                                                               |  |                          |   |  |                             |   |  |                 |   |  |                          |         |  
|Net income                                                                     |  | (Yen)9,250,032           |   |  | (Yen)15,874,836             |   |  | (Yen)18,669,954 |   |  | $                        | 158,220 |  
|                                                                               |  |                          |   |  |                             |   |  |                 |   |  |                          |         |  
|                                                                               |  |                          |   | 
|                                                                               |  | Yen                      |   |  | Yen                         |   |  | Yen             |   |  | U.S. dollars             |        
|Per share data:                                                                |  |                          |   |  |                             |   |  |                 |   |  |                          |         |  
|Net income basic                                                              |  | (Yen)70.11               |   |  | (Yen)120.64                 |   |  | (Yen)139.85     |   |  | $                        | 1.19    |  
|diluted                                                                       |  | 69.95                    |   |  | 118.59                      |   |  | 137.83          |   |  |                          | 1.17    |  
|Cash dividends                                                                 |  |                         |   |  | 14.00                       |   |  | 36.00           |   |  |                          | 0.31    |  



The accompanying notes
are an integral part of these statements.



F-5



---

TREND MICRO INCORPORATED

AND CONSOLIDATED SUBSIDIARIES



CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME



|                                                                             |  |                          |           |   |                           |       |            |      |  |       |            |   |  |   |         |  
|---------------------------------------------------------------------------- |  | ------------------------ | --------- | - | ------------------------- | ----- | ---------- | ---- |  | ----- | ---------- | - |  | - | ------- | -
|                                                                             |  | Years ended December 31, |           |   | Year ended December 31,   |      
|                                                                             |  | 2003                     |           |   | 2004                      |       |            | 2005 |  |       | 2005       |  
|                                                                             |  | Thousands of yen         |           |   | Thousands of U.S. dollars |      
|Net income                                                                   |  | (Yen)                    | 9,250,032 |   |                           | (Yen) | 15,874,836 |      |  | (Yen) | 18,669,954 |   |  | $ | 158,220 |  
|                                                                             |  |                          |           |   |                           |       |            |      |  |       |            |   |  |   |         |  
|Other comprehensive income (loss), before tax:                               |  |                          |           |   |                           |       |            |      |  |       |            |   |  |   |         |  
|Unrealized gains on debt and equity securities:                              |  |                          |           |   |                           |       |            |      |  |       |            |   |  |   |         |  
|Unrealized holding gains arising during period                               |  |                          | 135,323   |   |                           |       | 514,117    |      |  |       | 1,375,136  |   |  |   | 11,654  |  
|Less reclassification adjustment for (gains) losses included in net income   |  |                          | 132,701   |   |                           |       | (143,702   | )    |  |       | (704,199   | ) |  |   | (5,968  | )
|                                                                             |  |                          |           |   |                           |       |            |      |  |       |            |   |  |   |         |  
|                                                                             |  |                          | 268,024   |   |                           |       | 370,415    |      |  |       | 670,937    |   |  |   | 5,686   |  
|Foreign currency translation adjustments                                     |  |                          | (786,025  | ) |                           |       | (105,517   | )    |  |       | 2,066,063  |   |  |   | 17,509  |  
|                                                                             |  |                          |           |   |                           |       |            |      |  |       |            |   |  |   |         |  
|Total                                                                        |  |                          | (518,001  | ) |                           |       | 264,898    |      |  |       | 2,737,000  |   |  |   | 23,195  |  
|Income tax expense related to unrealized gains on debt and equity securities |  |                          | (113,182  | ) |                           |       | (157,032   | )    |  |       | (297,400   | ) |  |   | (2,520  | )
|                                                                             |  |                          |           |   |                           |       |            |      |  |       |            |   |  |   |         |  
|Other comprehensive income (loss), net of tax                                |  |                          | (631,183  | ) |                           |       | 107,866    |      |  |       | 2,439,600  |   |  |   | 20,675  |  
|                                                                             |  |                          |           |   |                           |       |            |      |  |       |            |   |  |   |         |  
|Comprehensive income                                                         |  | (Yen)                    | 8,618,849 |   |                           | (Yen) | 15,982,702 |      |  | (Yen) | 21,109,554 |   |  | $ | 178,895 |  
|                                                                             |  |                          |           |   |                           |       |            |      |  |       |            |   |  |   |         |  



The accompanying notes
are an integral part of these statements.



F-6



---

TREND MICRO INCORPORATED

AND CONSOLIDATED SUBSIDIARIES



CONSOLIDATED STATEMENTS OF SHAREHOLDERS EQUITY



|                                                                                            |  |                          |            |   |                           |       |            |      |  |       |            |   |  |   |         |  
|------------------------------------------------------------------------------------------- |  | ------------------------ | ---------- | - | ------------------------- | ----- | ---------- | ---- |  | ----- | ---------- | - |  | - | ------- | -
|                                                                                            |  | Years ended December 31, |            |   | Year ended December 31,   |      
|                                                                                            |  | 2003                     |            |   | 2004                      |       |            | 2005 |  |       | 2005       |  
|                                                                                            |  | Thousands of yen         |            |   | Thousands of U.S. dollars |      
|Common stock:                                                                               |  |                          |            |   |                           |       |            |      |  |       |            |   |  |   |         |  
|Balance at beginning of year                                                                |  | (Yen)                    | 7,257,060  |   |                           | (Yen) | 7,396,194  |      |  | (Yen) | 11,426,977 |   |  | $ | 96,839  |  
|Exercise of stock purchase warrants and stock acquisition rights                            |  |                          | 139,134    |   |                           |       | 4,030,783  |      |  |       | 1,057,872  |   |  |   | 8,965   |  
|                                                                                            |  |                          |            |   |                           |       |            |      |  |       |            |   |  |   |         |  
|Balance at end of year                                                                      |  |                          | 7,396,194  |   |                           |       | 11,426,977 |      |  |       | 12,484,849 |   |  |   | 105,804 |  
|                                                                                            |  |                          |            |   |                           |       |            |      |  |       |            |   |  |   |         |  
|Additional paid-in capital:                                                                 |  |                          |            |   |                           |       |            |      |  |       |            |   |  |   |         |  
|Balance at beginning of year                                                                |  |                          | 13,021,554 |   |                           |       | 13,165,881 |      |  |       | 17,359,335 |   |  |   | 147,113 |  
|Tax benefit from exercise of non-qualified stock warrants                                   |  |                          | 233,277    |   |                           |       | 498,905    |      |  |       | 155,323    |   |  |   | 1,316   |  
|Tax recognition derived from elimination of reversed warrant related with stock option plan |  |                          | (228,085   | ) |                           |       | (312,708   | )    |  |       |           |   |  |   |        |  
|Loss on providing of treasury stock for stock option transactions, net of tax               |  |                          |           |   |                           |       | (22,941    | )    |  |       |           |   |  |   |        |  
|Exercise of stock purchase warrants and stock acquisition rights                            |  |                          | 139,135    |   |                           |       | 4,030,198  |      |  |       | 1,057,405  |   |  |   | 8,961   |  
|                                                                                            |  |                          |            |   |                           |       |            |      |  |       |            |   |  |   |         |  
|Balance at end of year                                                                      |  |                          | 13,165,881 |   |                           |       | 17,359,335 |      |  |       | 18,572,063 |   |  |   | 157,390 |  
|                                                                                            |  |                          |            |   |                           |       |            |      |  |       |            |   |  |   |         |  
|Retained earnings:                                                                          |  |                          |            |   |                           |       |            |      |  |       |            |   |  |   |         |  
|Balance at beginning of year                                                                |  |                          | 18,986,701 |   |                           |       | 28,236,466 |      |  |       | 42,165,026 |   |  |   | 357,330 |  
|Net income                                                                                  |  |                          | 9,250,032  |   |                           |       | 15,874,836 |      |  |       | 18,669,954 |   |  |   | 158,220 |  
|Stock issue costs, net of tax                                                               |  |                          | (267       | ) |                           |       | (11,977    | )    |  |       | (3,519     | ) |  |   | (30     | )
|Cash dividends                                                                              |  |                          |           |   |                           |       | (1,829,260 | )    |  |       | (4,794,028 | ) |  |   | (40,627 | )
|Loss on providing of treasury stock for stock option transactions, net of tax               |  |                          |           |   |                           |       | (105,039   | )    |  |       | (65,478    | ) |  |   | (555    | )
|                                                                                            |  |                          |            |   |                           |       |            |      |  |       |            |   |  |   |         |  
|Balance at end of year                                                                      |  |                          | 28,236,466 |   |                           |       | 42,165,026 |      |  |       | 55,971,955 |   |  |   | 474,338 |  
|                                                                                            |  |                          |            |   |                           |       |            |      |  |       |            |   |  |   |         |  
|Net unrealized gain (loss) on debt and equity securities:                                   |  |                          |            |   |                           |       |            |      |  |       |            |   |  |   |         |  
|Balance at beginning of year                                                                |  |                          | (83,877    | ) |                           |       | 70,965     |      |  |       | 284,348    |   |  |   | 2,410   |  
|Net change during the year                                                                  |  |                          | 154,842    |   |                           |       | 213,383    |      |  |       | 373,537    |   |  |   | 3,166   |  
|                                                                                            |  |                          |            |   |                           |       |            |      |  |       |            |   |  |   |         |  
|Balance at end of year                                                                      |  |                          | 70,965     |   |                           |       | 284,348    |      |  |       | 657,885    |   |  |   | 5,576   |  
|                                                                                            |  |                          |            |   |                           |       |            |      |  |       |            |   |  |   |         |  



F-7



---

TREND MICRO INCORPORATED

AND CONSOLIDATED SUBSIDIARIES



CONSOLIDATED STATEMENTS OF SHAREHOLDERS EQUITY



|                                                          |  |                          |            |   |                           |       |            |      |  |       |            |   |  |   |         |  
|--------------------------------------------------------- |  | ------------------------ | ---------- | - | ------------------------- | ----- | ---------- | ---- |  | ----- | ---------- | - |  | - | ------- | -
|                                                          |  | Years ended December 31, |            |   | Year ended December 31,   |      
|                                                          |  | 2003                     |            |   | 2004                      |       |            | 2005 |  |       | 2005       |  
|                                                          |  | Thousands of yen         |            |   | Thousands of U.S. dollars |      
|Cumulative translation adjustments:                       |  |                          |            |   |                           |       |            |      |  |       |            |   |  |   |         |  
|Balance at beginning of year                              |  |                          | 285,079    |   |                           |       | (500,946   | )    |  |       | (606,463   | ) |  |   | (5,140  | )
|Aggregate translation adjustments for the year            |  |                          | (786,025   | ) |                           |       | (105,517   | )    |  |       | 2,066,063  |   |  |   | 17,509  |  
|                                                          |  |                          |            |   |                           |       |            |      |  |       |            |   |  |   |         |  
|Balance at end of year                                    |  |                          | (500,946   | ) |                           |       | (606,463   | )    |  |       | 1,459,600  |   |  |   | 12,369  |  
|                                                          |  |                          |            |   |                           |       |            |      |  |       |            |   |  |   |         |  
|Treasury stock, at cost:                                  |  |                          |            |   |                           |       |            |      |  |       |            |   |  |   |         |  
|Balance at beginning of year                              |  |                          | (2,322,287 | ) |                           |       | (4,416,763 | )    |  |       | (7,454,463 | ) |  |   | (63,173 | )
|Purchase of treasury stock                                |  |                          | (2,094,476 | ) |                           |       | (3,759,507 | )    |  |       | (142,062   | ) |  |   | (1,204  | )
|Provision of treasury stock for stock option transactions |  |                          |           |   |                           |       | 721,807    |      |  |       | 313,283    |   |  |   | 2,655   |  
|                                                          |  |                          |            |   |                           |       |            |      |  |       |            |   |  |   |         |  
|Balance at end of year                                    |  |                          | (4,416,763 | ) |                           |       | (7,454,463 | )    |  |       | (7,283,242 | ) |  |   | (61,722 | )
|                                                          |  |                          |            |   |                           |       |            |      |  |       |            |   |  |   |         |  
|Total Shareholders equity                                |  | (Yen)                    | 43,951,797 |   |                           | (Yen) | 63,174,760 |      |  | (Yen) | 81,863,110 |   |  | $ | 693,755 |  
|                                                          |  |                          |            |   |                           |       |            |      |  |       |            |   |  |   |         |  



The accompanying notes
are an integral part of these statements.



F-8



---

TREND MICRO INCORPORATED

AND CONSOLIDATED SUBSIDIARIES



CONSOLIDATED STATEMENTS OF CASH FLOWS



|                                                                                           |  |                          |             |   |                          |       |             |      |  |       |             |   |  |   |          |  
|------------------------------------------------------------------------------------------ |  | ------------------------ | ----------- | - | ------------------------ | ----- | ----------- | ---- |  | ----- | ----------- | - |  | - | -------- | -
|                                                                                           |  | Years ended December 31, |             |   | Year endedDecember 31,   |      
|                                                                                           |  | 2003                     |             |   | 2004                     |       |             | 2005 |  |       | 2005        |  
|                                                                                           |  | Thousands of yen         |             |   | Thousands ofU.S. dollars |      
|Cash flows from operating activities:                                                      |  |                          |             |   |                          |       |             |      |  |       |             |   |  |   |          |  
|Net income                                                                                 |  | (Yen)                    | 9,250,032   |   |                          | (Yen) | 15,874,836  |      |  | (Yen) | 18,669,954  |   |  | $ | 158,220  |  
|Adjustments to reconcile net income to net cash provided by operating activities          |  |                          |             |   |                          |       |             |      |  |       |             |   |  |   |          |  
|Depreciation and amortization                                                              |  |                          | 2,266,356   |   |                          |       | 1,590,743   |      |  |       | 1,878,050   |   |  |   | 15,916   |  
|Pension and severance costs, less payments                                                 |  |                          | 140,661     |   |                          |       | 166,649     |      |  |       | 207,109     |   |  |   | 1,755    |  
|Deferred income taxes                                                                      |  |                          | (1,334,998  | ) |                          |       | (1,390,387  | )    |  |       | (1,358,568  | ) |  |   | (11,513  | )
|(Gain) loss on sales of marketable securities                                              |  |                          | 65,259      |   |                          |       | (101,199    | )    |  |       | (370,326    | ) |  |   | (3,138   | )
|Impairment loss of securities investments                                                  |  |                          | 7,360       |   |                          |       |            |      |  |       |            |   |  |   |         |  
|Equity in earnings of affiliated companies                                                 |  |                          | (23,623     | ) |                          |       | (53,122     | )    |  |       | (66,551     | ) |  |   | (564     | )
|Loss on disposal of fixed assets                                                           |  |                          |            |   |                          |       |            |      |  |       | 11,585      |   |  |   | 98       |  
|Minority interest                                                                          |  |                          |            |   |                          |       |            |      |  |       | 338         |   |  |   | 3        |  
|Changes in assets and liabilities:                                                         |  |                          |             |   |                          |       |             |      |  |       |             |   |  |   |          |  
|Increase in deferred revenue                                                               |  |                          | 5,036,872   |   |                          |       | 7,293,488   |      |  |       | 6,209,680   |   |  |   | 52,624   |  
|Increase in accounts receivable, net of allowances                                         |  |                          | (446,201    | ) |                          |       | (3,421,729  | )    |  |       | (3,567,924  | ) |  |   | (30,237  | )
|(Increase) decrease in inventories                                                         |  |                          | 278,751     |   |                          |       | (124,093    | )    |  |       | (124,971    | ) |  |   | (1,059   | )
|Increase (decrease) in notes and accounts payable trade                                    |  |                          | (52,021     | ) |                          |       | 379,882     |      |  |       | (526,321    | ) |  |   | (4,460   | )
|Increase (decrease) in accrued income and other taxes                                      |  |                          | 193,227     |   |                          |       | 2,912,481   |      |  |       | (1,826,959  | ) |  |   | (15,483  | )
|Increase in other current assets                                                           |  |                          | (67,898     | ) |                          |       | (90,479     | )    |  |       | (34,426     | ) |  |   | (292     | )
|Increase (decrease) in accounts payable, other                                             |  |                          | (11,962     | ) |                          |       | 823,199     |      |  |       | 381,414     |   |  |   | 3,232    |  
|Increase in other current liabilities                                                      |  |                          | 602,296     |   |                          |       | 1,107,855   |      |  |       | 1,336,703   |   |  |   | 11,328   |  
|(Increase) decrease in other assets                                                        |  |                          | (324,879    | ) |                          |       | 110,628     |      |  |       | (207,984    | ) |  |   | (1,763   | )
|Other                                                                                      |  |                          | 87,072      |   |                          |       | (178,744    | )    |  |       | 34,809      |   |  |   | 295      |  
|                                                                                           |  |                          |             |   |                          |       |             |      |  |       |             |   |  |   |          |  
|Net cash provided by operating activities                                                  |  |                          | 15,666,304  |   |                          |       | 24,900,008  |      |  |       | 20,645,612  |   |  |   | 174,962  |  
|                                                                                           |  |                          |             |   |                          |       |             |      |  |       |             |   |  |   |          |  
|Cash flows from investing activities:                                                      |  |                          |             |   |                          |       |             |      |  |       |             |   |  |   |          |  
|Payments for purchases of property and equipment                                           |  |                          | (715,901    | ) |                          |       | (801,935    | )    |  |       | (1,153,193  | ) |  |   | (9,773   | )
|Software development cost                                                                  |  |                          | (788,760    | ) |                          |       | (645,166    | )    |  |       | (1,446,248  | ) |  |   | (12,256  | )
|Payments for purchases of other intangibles                                                |  |                          | (270,570    | ) |                          |       | (229,167    | )    |  |       | (216,107    | ) |  |   | (1,831   | )
|Proceeds from sales and maturities of marketable securities                                |  |                          | 2,945,331   |   |                          |       | 4,986,012   |      |  |       | 22,079,575  |   |  |   | 187,115  |  
|Payments for purchases of marketable securities maturing within three months or less (net) |  |                          |            |   |                          |       | (2,156,191  | )    |  |       | (189,708    | ) |  |   | (1,608   | )
|Payments for purchases of marketable securities and security investments                   |  |                          | (10,248,908 | ) |                          |       | (17,240,100 | )    |  |       | (28,043,534 | ) |  |   | (237,657 | )
|Payment for business acquisition                                                           |  |                          |            |   |                          |       |            |      |  |       | (2,716,702  | ) |  |   | (23,023  | )
|(Payments for) / Proceeds from time deposits                                               |  |                          | (374,601    | ) |                          |       | 57,047      |      |  |       | (1,052,017  | ) |  |   | (8,915   | )
|                                                                                           |  |                          |             |   |                          |       |             |      |  |       |             |   |  |   |          |  
|Net cash used in investing activities                                                      |  |                          | (9,453,409  | ) |                          |       | (16,029,500 | )    |  |       | (12,737,934 | ) |  |   | (107,948 | )
|                                                                                           |  |                          |             |   |                          |       |             |      |  |       |             |   |  |   |          |  



F-9



---

TREND MICRO INCORPORATED

AND CONSOLIDATED SUBSIDIARIES



CONSOLIDATED STATEMENTS OF CASH FLOWS



|                                                                                                      |  |                          |            |   |                          |       |            |      |  |       |            |   |  |   |         |  
|----------------------------------------------------------------------------------------------------- |  | ------------------------ | ---------- | - | ------------------------ | ----- | ---------- | ---- |  | ----- | ---------- | - |  | - | ------- | -
|                                                                                                      |  | Years ended December 31, |            |   | Year ended December 31,  |      
|                                                                                                      |  | 2003                     |            |   | 2004                     |       |            | 2005 |  |       | 2005       |  
|                                                                                                      |  | Thousands of yen         |            |   | Thousands ofU.S. dollars |      
|Cash flows from financing activities:                                                                 |  |                          |            |   |                          |       |            |      |  |       |            |   |  |   |         |  
|Issuance of common stock pursuant to exercise of stock purchase warrants and stock acquisition rights |  |                          | 278,002    |   |                          |       | 8,049,004  |      |  |       | 2,111,758  |   |  |   | 17,896  |  
|Redemption of bonds                                                                                   |  |                          | (5,000,000 | ) |                          |       | (6,500,000 | )    |  |       |           |   |  |   |        |  
|Proceeds from / (Provisions of) treasury stock, net                                                   |  |                          | (2,094,476 | ) |                          |       | (3,165,679 | )    |  |       | 105,743    |   |  |   | 896     |  
|Tax benefit from exercise of non-qualified stock warrants                                             |  |                          | 233,277    |   |                          |       | 498,905    |      |  |       | 155,322    |   |  |   | 1,316   |  
|Tax recognition derived from elimination of reversed warrant related with stock option plan           |  |                          | (228,085   | ) |                          |       | (312,708   | )    |  |       |           |   |  |   |        |  
|Capital contribution from minority interest                                                           |  |                          |           |   |                          |       |           |      |  |       | 4,193      |   |  |   | 36      |  
|Dividend paid                                                                                         |  |                          |           |   |                          |       | (1,819,607 | )    |  |       | (4,782,764 | ) |  |   | (40,532 | )
|                                                                                                      |  |                          |            |   |                          |       |            |      |  |       |            |   |  |   |         |  
|Net cash used in financing activities                                                                 |  |                          | (6,811,282 | ) |                          |       | (3,250,085 | )    |  |       | (2,405,748 | ) |  |   | (20,388 | )
|                                                                                                      |  |                          |            |   |                          |       |            |      |  |       |            |   |  |   |         |  
|Effect of exchange rate changes on cash and cash equivalents                                          |  |                          | (512,494   | ) |                          |       | 568,994    |      |  |       | 1,202,290  |   |  |   | 10,189  |  
|                                                                                                      |  |                          |            |   |                          |       |            |      |  |       |            |   |  |   |         |  
|Net increase (decrease) in cash and cash equivalents                                                  |  |                          | (1,110,881 | ) |                          |       | 6,189,417  |      |  |       | 6,704,220  |   |  |   | 56,815  |  
|Cash and cash equivalents at beginning of year                                                        |  |                          | 47,829,821 |   |                          |       | 46,718,940 |      |  |       | 52,908,357 |   |  |   | 448,376 |  
|                                                                                                      |  |                          |            |   |                          |       |            |      |  |       |            |   |  |   |         |  
|Cash and cash equivalents at end of year                                                              |  | (Yen)                    | 46,718,940 |   |                          | (Yen) | 52,908,357 |      |  | (Yen) | 59,612,577 |   |  | $ | 505,191 |  
|                                                                                                      |  |                          |            |   |                          |       |            |      |  |       |            |   |  |   |         |  
|Supplementary information of cash flow:                                                               |  |                          |            |   |                          |       |            |      |  |       |            |   |  |   |         |  
|Payment for interest expense                                                                          |  | (Yen)                    | 151,623    |   |                          | (Yen) | 114,121    |      |  | (Yen) | 3,709      |   |  | $ | 31      |  
|Payment for income taxes                                                                              |  |                          | 7,102,721  |   |                          |       | 8,990,398  |      |  |       | 13,109,985 |   |  |   | 111,102 |  
|                                                                                                      |  |                          |            |   |                          |       |            |      |  |       |            |   |  |   |         |  



The accompanying notes
are an integral part of these statements.



F-10



---

TREND MICRO INCORPORATED

AND CONSOLIDATED SUBSIDIARIES



NOTES TO CONSOLIDATED FINANCIAL STATEMENTS



1. Nature of operations



Trend Micro Incorporated (the parent company) and its subsidiaries (collectively the Company) are primarily engaged
in the development, production and sale of anti-virus software and providing management solutions for corporate computer systems. The Company develops its software in Japan, Taiwan, the United States, Germany, UK and China, and its products are
marketed by sales subsidiaries throughout the world.



2. Summary of
significant accounting policies



The parent company and its subsidiaries
in Japan maintain their records and prepare their financial statements in accordance with accounting principles generally accepted in Japan, and its foreign subsidiaries maintain their records and prepare their financial statements in conformity
with accounting principles generally accepted in the respective countries of their domicile. Certain adjustments and reclassifications, including those relating to the tax effects of temporary differences, valuation of debt and equity securities and
revenue on post-contract support, have been incorporated in the accompanying consolidated financial statements to conform with accounting principles generally accepted in the United States of America (U.S. GAAP). These adjustments were
not recorded in the statutory books of account.



The preparation of financial
statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and
the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.



(1) Restatements



The Company has historically disclosed maintenance costs as part of the Research and development and maintenance line item within
operating expenses in the consolidated income statements. Details of these costs are disclosed in footnote 11. Starting in the fiscal year ended 2005, maintenance costs are included in costs of sales and prior years figures have been restated
to reflect such amendment. In addition, customer support expenses, which were disclosed as a part of operating expenses through December 31, 2004, have been also included in cost of sales starting fiscal year ended 2005 and prior years figures
have been restated to reflect such amendment. The nature of these costs is disclosed in footnote 20.



The following table summarizes the impact of the corrections to the statements of income for the two years ended December 31, 2004 (in thousands of Yen):



|                                                    |  |                                      |  |             |   |  |           
|--------------------------------------------------- |  | ------------------------------------ |  | ----------- | - |  | ----------
|                                                    |  | For the year ended December 31, 2004
|                                                    |  | As Reported                          |  | Restatement |   |  | Restated  
|Sales                                               |  | 62,049,254                           |  |            |   |  | 62,049,254
|Cost of sales                                       |  |                                      |  |             |   |  |           
|Amortization of capitalized software, and Materials |  | 3,236,499                            |  |            |   |  | 3,236,499 
|Maintenance                                         |  |                                     |  | 2,260,934   |   |  | 2,260,934 
|Customer Support                                    |  |                                     |  | 5,723,426   |   |  | 5,723,426 
|                                                    |  |                                      |  |             |   |  |           
|Total Cost of sales                                 |  | 3,236,499                            |  | 7,984,360   |   |  | 11,220,859
|                                                    |  |                                      |  |             |   |  |           
|Operating expenses:                                 |  |                                      |  |             |   |  |           
|Selling                                             |  | 16,009,409                           |  |            |   |  | 16,009,409
|Research and development                            |  | 4,858,259                            |  | (2,260,934  | ) |  | 2,597,325 
|Customer Support                                    |  | 5,723,426                            |  | (5,723,426  | ) |  |          
|General and administrative                          |  | 6,143,985                            |  |            |   |  | 6,143,985 
|                                                    |  |                                      |  |             |   |  |           
|Total operating expenses                            |  | 32,735,079                           |  | (7,984,360  | ) |  | 24,750,719
|                                                    |  |                                      |  |             |   |  |           
|Operating income                                    |  | 26,077,676                           |  |            |   |  | 26,077,676
|                                                    |  |                                      |  |             |   |  |           

|                                                    |  |                                      |  |             |   |  |           
|--------------------------------------------------- |  | ------------------------------------ |  | ----------- | - |  | ----------
|                                                    | 
|                                                    |  | For the year ended December 31, 2003
|                                                    |  | As Reported                          |  | Restatement |   |  | Restated  
|Sales                                               |  | 48,088,347                           |  |            |   |  | 48,088,347
|Cost of sales                                       |  |                                      |  |             |   |  |           
|Amortization of capitalized software, and Materials |  | 3,168,467                            |  |            |   |  | 3,168,467 
|Maintenance                                         |  |                                     |  | 2,193,624   |   |  | 2,193,624 
|Customer Support                                    |  |                                     |  | 4,830,660   |   |  | 4,830,660 
|                                                    |  |                                      |  |             |   |  |           
|Total Cost of sales                                 |  | 3,168,467                            |  | 7,024,284   |   |  | 10,192,751
|                                                    |  |                                      |  |             |   |  |           
|Operating expenses:                                 |  |                                      |  |             |   |  |           
|Selling                                             |  | 15,360,532                           |  |            |   |  | 15,360,532
|Research and development                            |  | 3,919,024                            |  | (2,193,624  | ) |  | 1,725,400 
|Customer Support                                    |  | 4,830,660                            |  | (4,830,660  | ) |  |          
|General and administrative                          |  | 5,656,168                            |  |            |   |  | 5,656,168 
|                                                    |  |                                      |  |             |   |  |           
|Total operating expenses                            |  | 29,766,384                           |  | (7,024,284  | ) |  | 22,742,100
|                                                    |  |                                      |  |             |   |  |           
|Operating income                                    |  | 15,153,496                           |  |            |   |  | 15,153,496
|                                                    |  |                                      |  |             |   |  |           



Pro forma stock-based
compensation expense has been revised to reflect the corrections in the amortization period, expected life assumptions and volatilities used to determine stock-based compensation expense. This correction impacts the pro forma net income and pro
forma net income per share previously disclosed in the footnotes to the consolidated financial statements the years ended December 31, 2003 and 2004 . The corrections do not impact consolidated net income.



The following table summarizes the impact of the corrections to the
pro-forma compensation expense disclosures as required by FAS 123 as amended by FAS 148, for the two years ended December 31, 2004 (in thousands of Yen).



|                                                                                                                                            |  |                                      |   |  |             |   |  |            |  
|------------------------------------------------------------------------------------------------------------------------------------------- |  | ------------------------------------ | - |  | ----------- | - |  | ---------- | -
|                                                                                                                                            |  | For the year ended December 31, 2004 |  
|                                                                                                                                            |  | As Reported                          |   |  | Restatement |   |  | Restated   |  
|Net income:                                                                                                                                 |  |                                      |   |  |             |   |  |            |  
|As reported                                                                                                                                 |  | 15,874,836                           |   |  |            |   |  | 15,874,836 |  
|Deduct: Total stock-based employee compensation expense determined under fair value based method for all awards, net of related tax
effects |  | (2,640,021                           | ) |  | (679,588    | ) |  | (3,319,609 | )
|Pro forma net income                                                                                                                        |  | 13,234,815                           |   |  | (679,588    | ) |  | 12,555,227 |  
|Net income per share:                                                                                                                       |  |                                      |   |  |             |   |  |            |  
|As reported                                                                                                                                |  |                                      |   |  |             |   |  |            |  
|Basic                                                                                                                                       |  | 120.64                               |   |  |            |   |  | 120.64     |  
|Diluted                                                                                                                                     |  | 118.59                               |   |  |            |   |  | 118.59     |  
|Pro forma net income                                                                                                                       |  |                                      |   |  |             |   |  |            |  
|Basic                                                                                                                                       |  | 100.58                               |   |  | (5.17       | ) |  | 95.41      |  
|Diluted                                                                                                                                     |  | 98.87                                |   |  | (5.08       | ) |  | 93.79      |  
|                                                                                                                                            | 
|                                                                                                                                            |  | For the year ended December 31, 2003 |  
|                                                                                                                                            |  | As Reported                          |   |  | Restatement |   |  | Restated   |  
|Net income:                                                                                                                                 |  |                                      |   |  |             |   |  |            |  
|As reported                                                                                                                                 |  | 9,250,032                            |   |  |            |   |  | 9,250,032  |  
|Deduct: Total stock-based employee compensation expense determined under fair value based method for all awards, net of related tax
effects |  | (1,351,384                           | ) |  | (2,315,544  | ) |  | (3,666,928 | )
|Pro forma net income                                                                                                                        |  | 7,898,648                            |   |  | (2,315,544  | ) |  | 5,583,104  |  
|Net income per share:                                                                                                                       |  |                                      |   |  |             |   |  |            |  
|As reported                                                                                                                                |  |                                      |   |  |             |   |  |            |  
|Basic                                                                                                                                       |  | 70.11                                |   |  |            |   |  | 70.11      |  
|Diluted                                                                                                                                     |  | 69.95                                |   |  |            |   |  | 69.95      |  
|Pro forma net income                                                                                                                       |  |                                      |   |  |             |   |  |            |  
|Basic                                                                                                                                       |  | 59.87                                |   |  | (17.55      | ) |  | 42.32      |  
|Diluted                                                                                                                                     |  | 59.73                                |   |  | (17.51      | ) |  | 42.22      |  



(2) Significant accounting
policies:



Basis of consolidation



The consolidated financial statements include the accounts of the parent
company and those of its majority-owned subsidiaries. All intercompany transactions and accounts are eliminated on consolidation.



Investments in affiliated companies (20 to 50 percent-owned companies) in which the ability to exercise significant influence exists are stated at cost
plus the equity in undistributed earnings (losses). Net consolidated income includes the companys equity in the current net earnings (losses) of such companies, after elimination of unrealized intercompany profit.



F-11



---

During the FY2005, the Company acquired 100% of the outstanding capital shares of Trend Micro Braintree
Inc. (former InterMute, Inc.,) and Trend Micro San Jose, Inc (former Kelkea Inc.) in purchase business combinations. These acquisitions are intended to expand our service offerings for advanced data privacy protection and advanced IP filtering and
reputation services technologies. The aggregate purchase price was (Yen) 2,746,505 thousand and (Yen) 2,130,179 thousand has been recorded as goodwill. All of (Yen) 2,130,179 thousand goodwill was allocated to North America Segment.
As of December 31, 2005, these subsidiaries were merged with Trend Micro Inc.(USA). With the merger with Trend Micro Braintree, Inc., the Company has contingent consideration remaining in the amount of USD10,500 thousands (equivalent of (Yen)
1,239,735 thousand as converted using the year end exchange rate of \118.07/US$) , subject to the predecessor companys achievement of specified sales for the period beginning with the closing of the acquisition and ending twelve months
thereafter. If this extra payment is made, the carrying amount of goodwill will be adjusted.



Translation of foreign currencies



All asset and liability accounts of foreign subsidiaries are translated into Japanese yen at year-end rates of exchange and all income and expense accounts are translated at rates of exchange that approximate to those
prevailing at the time of the transactions. The resulting translation adjustments are included in accumulated other comprehensive income (loss).



Foreign currency denominated receivables and payables are translated into Japanese yen at year-end rates of exchange and the resulting translation gains
or losses are taken into current income.



Revenue
recognition



The Companys revenue is derived
primarily from product revenue, which includes software product license and post-contract customer support services. Other revenue is composed of hardware revenue, royalty revenue and supplementary service revenue. Royalty revenue is comprised of
fees from Application service providers and Internet service providers and supplementary services are comprised of fees from services based on Premium support program and Service level agreement.
Product revenue includes the type of limited sales of our products to other companies for inclusion in their products.



The Company licenses its software products under perpetual licenses. The Company sells its products and services via its direct sales force and through
domestic and foreign intermediaries.



The Company applies the
provisions of SOP 97-2, Software Revenue Recognition, as amended by SOP 98-9 Modification of SOP 97-2, Software Revenue Recognition, With Respect to Certain Transactions to all transactions involving the sale of
software products and hardware transactions where software is not incidental. For hardware transactions where software is not incidental, the Company does not bifurcate the fee and apply separate accounting guidance to the hardware and software
elements.



Revenue from the Companys software product
license and hardware where software is not incidental is recognized when persuasive evidence of an arrangement exists, the product has been delivered, the fee is fixed and determinable, and collection of the resulting receivable, net of allowances
for doubtful accounts and sales returns, is reasonably assured. Post-contract customer support services revenue which includes virus pattern updates, unspecified product version updates, telephone and online technical support and supplementary
services revenue are deferred and recognized ratably over the service period. The Company allocates revenue to post-contract customer support services based on the fair value of the post-contract customer support services, which are determined based
on separate sales of renewals to customers. Royalty revenue is recognized as earned unless collection of the related receivables is not assured in which case, it is recognized upon receipt of cash.



For all sales, the Company uses either a binding purchase order or signed
license agreement as evidence of an arrangement. Sales through our intermediaries are evidenced by a master agreement governing the relationship together with binding purchase orders on a transaction-by-transaction basis.



F-12



---

At the time of the transaction, the Company assesses whether the fee associated with our revenue
transactions is fixed and determinable and whether or not collection is reasonably assured. The Company assesses whether the fee is fixed and determinable based on the payment terms associated with the transaction. If a significant portion of a fee
is due after our normal payment terms, which are 30 to 90 days from the invoice date, the Company accounts for the fee as not being fixed and determinable. In these cases, the Company recognizes revenue as the fees become due. The Company assesses
collection based on a number of factors, including past transaction history with the customer and the credit-worthiness of the customer. The Company does not request collateral from our customers. If the Company determines that collection of a fee
is not reasonably assured, the Company defers the fee and recognizes revenue at the time collection becomes reasonably assured, which is generally upon receipt of cash.



The Company recognizes revenue from sales to intermediaries when products have been delivered to the intermediary. The
Company primarily sells retail packages through intermediaries. After sale of a retail package, the Company may approve certain returns from intermediaries or end-users; therefore, the Company makes an estimate of returns from intermediaries or
end-users based on its historical experience. The provision for estimated returns is recorded as a reduction to revenue at the time of the sale.



The sales rebates to intermediaries are recognized as a reduction of revenue. Measurement of the sales rebates is based on two types of rebate
arrangements. In one arrangement, the amount of the rebate is calculated by multiplying fixed contractual rebate rate by the actual sales amount to intermediaries. In another arrangement, the rebate is paid only if the intermediaries achieve a
targeted level of quarterly sales. The rebate rates vary depending on the level of targets and the matrix table of targets and rebate rate are agreed with intermediaries at the beginning of each quarter. The Company applies the provision of EITF
01-9 Accounting for consideration given by a vendor to a customer or a reseller of the vendors products to all transactions where rebates are paid.



Cash and cash equivalents



Cash and cash equivalents include cash on hand, cash on deposit with banks and all highly liquid investments, with original maturities of three months
or less, that are readily convertible to known amounts of cash and are so near maturity that they present insignificant risk of changes in value because of changes in interest rates.



Marketable securities and Security investments



Marketable securities and security investments consist of debt securities, equity securities and mutual funds. Debt
securities, equity securities and mutual funds designated as available-for-sale are carried at fair value with unrealized gains or losses included in accumulated other comprehensive income (loss), net of applicable taxes. Debt securities designated
as held-to-maturity are carried at amortized cost. The Company classifies available for sale debt securities with maturities longer than one year as Securities investments in investments and other assets. Individual securities classified
as either available-for-sale or held-to-maturity are reduced to net realizable value for other than temporary declines in market value. Realized gains and losses, which are determined on the average cost method, are reflected in income.



Inventories



Finished products and raw materials are valued at the lower of weighted
average cost or net realizable value. Work in process is stated at accumulated production costs.



Property and equipment



Property and equipment are stated at cost less accumulated depreciation. Major renewals and improvements are capitalized; minor replacements, maintenance
and repairs are charged to current operations. Depreciation of property and equipment is computed on the declining-balance method for the parent company and on the straight-line method for foreign subsidiaries at rates based on estimated useful
lives of the assets according to general class, type of construction and use.



F-13



---

Estimated useful lives range mainly from 3 to 6 years for office furniture and equipment, and mainly from 3 to 6 years for other properties.



Intangible assets



Intangible assets, which mainly consist of software development costs and
purchased software, are amortized on a straight-line basis over the estimated economic lives of the products, generally over twelve-month period for software development costs and a five-year period for purchased software and other intangibles.



Goodwill and other intangible assets



Goodwill is the excess of the purchase price of the acquired business over
the fair value of its net tangible and identifiable intangible assets. Other intangible assets consist primarily of existing technology purchased by business acquisition.



We account for goodwill in accordance with SFAS 142, Goodwill and Other Intangible Assets. SFAS 142
requires, among other things, the discontinuance of amortization for goodwill and at least an annual test for impairment. An impairment review may be performed more frequently in the event circumstances indicate that the carrying value may not be
recoverable.



SFAS 142 also requires that intangible assets
with estimable useful lives be amortized over their respective estimated useful lives. Existing technology is amortized over 4 years.



Impairment of long-lived assets



The Company evaluates long-lived assets and definite lived intangible assets to be held and used whenever events or changes in circumstances indicate that
the carrying amount of an asset may not be recoverable. Determination of recoverability is based on the sum of expected future cash flows (undiscounted and without interest charges) from the use and eventual disposition of the asset. If the fair
value is less than the carrying amount of the asset, an impairment loss is recognized, based on the fair value of the asset.



Research and development costs and software development costs



All costs relating to research and development, to establish the technological feasibility of software products, are
expensed as incurred. Under the Companys software development process, technological feasibility is established on completing all substantial testing for the original English language version of the software. Local language versions of
software, such as Japanese or Chinese, are produced from the English language version, by adding Japanese language or Chinese language related functions. Production costs for such local language versions of software product masters, incurred
subsequent to the availability of original English language version software, are capitalized. Production costs of the local language software product masters, which include direct labor and overhead costs, are amortized to cost of sales using the
straight-line method over the current estimated economic lives of the products, generally up to twelve months.



Management considers the Companys capitalized software development costs to be fully recoverable from future product sales. Management estimates are
based upon supporting facts and circumstances, and may be significantly impacted based upon subsequent changes in business conditions.



Advertising costs



Advertising costs are expensed as incurred.



Stock-based compensation



The Company accounts for its stock-based incentive awards in accordance with the intrinsic value method as per APB No. 25, Accounting for Stock
Issued to Employees and related interpretations. The Company complies with the disclosure provisions of SFAS No. 123, Accounting for Stock-Based Compensation, as amended by SFAS No. 148.



F-14



---

In October 1995, SFAS 123 established a fair value based method of accounting for employee stock based
compensation. If compensation cost for the stock options with warrants, and the stock options with Stock acquisition rights been determined based on the fair value at the grant dates, as prescribed by SFAS 123, the Companys pro forma net
income and net income per share would have been as follows:



|                                                                                                                                            |  |                                       |            |   |               |       |            |      |  |       |            |   |  |   |         |  
|------------------------------------------------------------------------------------------------------------------------------------------- |  | ------------------------------------- | ---------- | - | ------------- | ----- | ---------- | ---- |  | ----- | ---------- | - |  | - | ------- | -
|                                                                                                                                            |  | Years ended December 31,              |           
|                                                                                                                                            |  | 2003                                  |            |   | 2004          |       |            | 2005 |  |       | 2005       |  
|                                                                                                                                            |  | (restated)(1)                         |            |   | (restated)(1) |       |            |      |  |       |            |  
|                                                                                                                                            |  | (in thousands, except per share data) |           
|Net income:                                                                                                                                 |  |                                       |            |   |               |       |            |      |  |       |            |   |  |   |         |  
|As reported                                                                                                                                 |  | (Yen)                                 | 9,250,032  |   |               | (Yen) | 15,874,836 |      |  | (Yen) | 18,669,954 |   |  | $ | 158,220 |  
|Deduct: Total stock-based employee compensation expense determined under fair value based method for all awards, net of related tax
effects |  |                                       | (3,666,928 | ) |               |       | (3,319,609 | )    |  |       | (3,594,158 | ) |  |   | (30,459 | )
|Pro forma net income                                                                                                                        |  |                                       | 5,583,104  |   |               |       | 12,555,227 |      |  |       | 15,075,796 |   |  |   | 127,761 |  
|Net income per share:                                                                                                                       |  |                                       |            |   |               |       |            |      |  |       |            |   |  |   |         |  
|As reported                                                                                                                                |  |                                       |            |   |               |       |            |      |  |       |            |   |  |   |         |  
|Basic                                                                                                                                       |  | (Yen)                                 | 70.11      |   |               | (Yen) | 120.64     |      |  | (Yen) | 139.85     |   |  | $ | 1.19    |  
|Diluted                                                                                                                                     |  |                                       | 69.95      |   |               |       | 118.59     |      |  |       | 137.83     |   |  |   | 1.17    |  
|Pro forma net income                                                                                                                       |  |                                       |            |   |               |       |            |      |  |       |            |   |  |   |         |  
|Basic                                                                                                                                       |  | (Yen)                                 | 42.32      |   |               | (Yen) | 95.41      |      |  | (Yen) | 112.93     |   |  | $ | 0.96    |  
|Diluted                                                                                                                                     |  |                                       | 42.22      |   |               |       | 93.79      |      |  |       | 111.30     |   |  |   | 0.94    |  



| | (1) | See Note 2 (1) to these consolidated financial statements.
| | --- | ----------------------------------------------------------



The fair values of the stock options with Stock acquisition rights were estimated on the date of grant using the Black-Scholes option pricing model with
the following assumptions used for grants during the year ended December 31, 2003, 2004 and 2005;



|                        |  |               |  |               |  |              
|----------------------- |  | ------------- |  | ------------- |  | -------------
|                        |  | 2003          |  | 2004          |  | 2005         
|Expected life (Years)   |  | 2.64-3.07     |  | 3.04-3.08     |  | 3.06         
|Expected Volatility     |  | 68.79%-74.32% |  | 52.41%-59.20% |  | 47.69%-48.77%
|Expected Dividend yield |  | 0.00%         |  | 0.28%-0.32%   |  | 0.91%-0.94%  
|Risk-free interest rate |  | 0.07%-0.31%   |  | 0.27%-0.32%   |  | 0.16%-0.47%  



The fair value per
share of options granted above during fiscal 2003, 2004 and 2005 were (Yen) 865-1,230, (Yen)1,682-1,788 and (Yen)1,203-1,225 ($10.20-10.38), respectively.



Income taxes



The current provision for income taxes is computed based on the pretax income included in the consolidated statement of income. The asset and liability
approach is used to recognize deferred tax assets and liabilities for the expected future tax consequences of temporary differences between the carrying amounts and the tax bases of assets and liabilities. Deferred tax assets and liabilities are
measured using enacted tax rates in effect for the year in which those temporary differences are expected to be recovered or settled. The effect on deferred assets (including deferred tax assets and liabilities on net unrealized gain or loss on debt
and equity securities) of a change in tax rates is recognized in income in the period that includes the enactment date. Valuation allowances are recorded to reduce deferred tax assets when it is more likely than not that a tax benefit will not be
realized.



Net income per share



Basic net income per share is computed based on the average number of shares
of common stock outstanding for the period. Diluted net income per share assumes the dilution that could occur if securities or other contracts to issue common stock were exercised or converted into common stock, or resulted in the issuance of
common stock. Net income per share is appropriately adjusted for any stock splits or free distributions of common stock.



F-15



---

Free distribution of common stock



On occasion, the Company has made free distributions of common stock to its shareholders which have been accounted for
either by a transfer of the applicable par value from additional paid-in capital to the common stock account or with no entry if free shares were distributed from the portion of previously issued shares accounted for as excess of par value in the
common stock account in accordance with the Japanese Commercial Code. However, as a result of the amendments to the Japanese Commercial Code in 2001 where the concept of par-value of shares was eliminated effective from October 1, 2001, a free
distribution of common stock to its shareholders is accounted for with no accounting entry. Under the Japanese Commercial Code, a stock dividend which is paid out of profits can be effected by an appropriation of retained earnings to the common
stock account by resolution of the general shareholders meeting, followed by a free distribution with respect to the amount as appropriated by resolution of the Board of Directors.



Common stock issue costs



Common stock issue costs are directly charged to retained earnings, net of tax, in the accompanying consolidated financial statements as the Japanese
Commercial Code prohibits charging such stock issue costs to capital accounts, which is the prevailing practice in the United States of America.



Comprehensive income



Other comprehensive income refers to revenues, expenses, gains and losses that under U.S. GAAP are included in comprehensive income but are excluded from
net income as these amounts are recorded directly as adjustments to shareholders equity. The Companys other comprehensive income primarily comprises unrealized gains or losses on debt and equity securities and foreign currency
translation adjustments.



Market and credit risks



The anti-virus software market is characterized by rapid
technological change and evolving industry standards in computer hardware and software technology. In addition, the markets for the Companys products are highly competitive and rapidly changing. The Company could incur substantial operating
losses if it is unable to offer products, which address technological and market place change in the anti-virus software industry.



Other financial instruments that potentially subject the Company to significant concentrations of credit risk consist principally of cash equivalents,
marketable securities and accounts receivable. The Company invests primarily in time deposits, money market funds and marketable securities and places its investments with high rating financial institutions. The Company performs ongoing credit
evaluations of its customers financial condition and maintains an allowance for uncollectible accounts receivable, if any, based upon the expected collectibility of accounts receivable.



|(3) | Recent pronouncements:
|--- | ----------------------



In November 2004, the FASB issued SFAS No. 151 Inventory Costs  an amendment of ARB No. 43, Chapter 4. This Statement
amends the guidance in ARB No. 43, Chapter 4, Inventory Pricing, to clarify the accounting for abnormal amounts of idle facility expense, freight, handling costs, and wasted material (spoilage). The provisions of SFAS No. 151
shall be effective for inventory costs incurred during fiscal years beginning after June 15, 2005. The standard will not have a material effect on the Companys financial position and results of operations.



In December 2004, the FASB revised SFAS No.123 Share-Based
Payment This new SFAS No.123 focuses primarily on accounting for transactions in which an entity obtains employee services in share-based payment transactions. This Statement is effective as of the beginning of the first fiscal year that
starts after June 15, 2005. We intend to adopt the provisions on FAS 123(R) effective January 1, 2006. The Companys pro forma net income and net income per share for the year ended December 31, 2005 based on the fair values of
the stock options with Stock acquisition rights, which were estimated on the date of grant using the Black-Scholes option pricing model in



F-16



---

accordance with the original SFAS No.123 are disclosed in Note 2 (1) Significant accounting policiesStock-based compensation. From
next fiscal year, stock option expense, which will be calculated in accordance with revised SFAS No. 123 using the same option pricing model, will be recorded in our income statement.



In December 2004, the FASB issued SFAS No. 152 Accounting for
Real Estate Time-Sharing Transactions  an amendment of FASB Statements No. 66 and 67. This Statement amends FASB Statement No. 66, Accounting for Sales of Real Estate, to reference the financial accounting and reporting
guidance for real estate time-sharing transactions that is provided in AICPA Statement of Position (SOP) 04-2, Accounting for Real Estate Time-Sharing Transactions. This Statement also amends FASB Statement No. 67, Accounting for Costs and
Initial Rental Operations of Real Estate Projects, to state that the guidance for (a) incidental operations and (b) costs incurred to sell real estate projects does not apply to real estate time-sharing transactions. The accounting for
those operations and costs is subject to the guidance in SOP 04-2. This Statement is effective for financial statements for fiscal years beginning after June 15, 2005. The standard will not have a material effect on the Companys financial
position and results of operations.



In December 2004, the
FASB issued SFAS No. 153 Exchanges of Nonmonetary Assets  an amendment of APB Opinion No. 29. The guidance in APB Opinion No. 29, Accounting for Nonmonetary Transactions, is based on the principle that
exchanges of nonmonetary assets should be measured based on the fair value of the assets exchanged. The guidance in that Opinion, however, included certain exceptions to that principle. This Statement amends Opinion 29 to eliminate the exception for
nonmonetary exchanges of similar productive assets and replaces it with a general exception for exchanges of nonmonetary assets that do not have commercial substance. A nonmonetary exchange has commercial substance if the future cash flows of the
entity are expected to change significantly as a result of the exchange. The provisions of this Statement shall be effective for nonmonetary asset exchanges occurring in fiscal periods beginning after June 15, 2005. The standard will not have a
material effect on the Companys financial position and results of operations.



In May 2005, the FASB issued SFAS No. 154 Accounting Changes and Error Corrections. SFAS 154, which replaces APB Opinion No. 20Accounting Changes, and SFAS No. 3
Reporting Accounting Changes in Interim Financial Statements  An Amendment of APB Opinion No. 28, applies to all voluntary changes in accounting principle and provides guidance on the accounting for and reporting of
accounting changes and error corrections. APB 20 previously required that most voluntary changes in accounting principle be recognized by including in net income of the period of change a cumulative effect of changing to the new accounting principle
while SFAS 154 requires retrospective application, or the latest practicable date, for reporting a change in accounting principle and the reporting of a correction of an error. SFAS 154 enhances the consistency of financial information between
periods. SFAS 154 is effective for accounting changes made in fiscal years beginning after December 15, 2005. Currently, we do not expect that adoption of the standard will have a material effect on our results of operations or financial
condition.



3. U.S. dollar amounts



U.S. dollar amounts presented in the financial statements are included solely for the
convenience of the reader. These translations should not be construed as representations that the yen amounts actually represent, or have been or could be converted into U.S. dollars. As the amounts shown in U.S. dollars are for convenience only,
the approximate current rate at December 31, 2005 ((Yen)118.00 = U.S. $1) has been used for the purpose of presentation of the U.S. dollar amounts in the accompanying consolidated financial statements.



4. Reconciliation of the difference between basic and diluted net income per share
(EPS)



Reconciliation of the differences between basic and
diluted EPS for the years ended December 31, 2003, 2004 and 2005, is as follows:



F-17



---

|                                                    |  |                     |           |                           |       |             |  |       |            |  |   |        
|--------------------------------------------------- |  | ------------------- | --------- | ------------------------- | ----- | ----------- |  | ----- | ---------- |  | - | -------
|                                                    |  | 2003                |           | 2004                      |       | 2005        |  | 2004 
|                                                    |  | Thousands of Yen    |           | Thousands of U.S. dollars
|Net income available to common stock holders        |  | (Yen)               | 9,250,032 |                           | (Yen  | )15,874,836 |  | (Yen) | 18,669,954 |  | $ | 158,220
|                                                    |  |                    
|                                                    |  | Thousands of Shares |           |                          
|Weighted-Average shares                             |  |                     | 131,940   |                           |       | 131,589     |  |       | 133,498    |  |   |        
|Effect of dilutive securities:                      |  |                     |           |                           |       |             |  |       |            |  |   |        
|Stock options                                       |  |                     | 295       |                           |       | 2,274       |  |       | 1,958      |  |   |        
|Weighted-Average shares for diluted EPS computation |  |                     | 132,235   |                           |       | 133,863     |  |       | 135,456    |  |   |        
|                                                    |  |                    
|                                                    |  | Yen                 |           | U.S. dollars             
|Basic EPS:                                          |  | (Yen)               | 70.11     |                           | (Yen) | 120.64      |  | (Yen) | 139.85     |  | $ | 1.19   
|Diluted EPS:                                        |  |                     | 69.95     |                           |       | 118.59      |  |       | 137.83     |  | $ | 1.17   



Shareholders equity per share as
of December 31, 2004 and 2005 were as follows:



|                               |  |              |        |              |       |        |  |   |     
|------------------------------ |  | ------------ | ------ | ------------ | ----- | ------ |  | - | ----
|                               |  | December 31, |        | December 31,
|                               |  | 2004         |        | 2005         |       | 2005  
|                               |  | Yen          |        | U.S. dollars
|Shareholders equity per share |  | (Yen)        | 474.40 |              | (Yen) | 610.51 |  | $ | 5.17



5. Cash and cash equivalents



Cash and cash equivalents as of
December 31, 2004 and 2005 comprised:



|                                                               |  |                  |            |                           |       |            |  |   |        
|-------------------------------------------------------------- |  | ---------------- | ---------- | ------------------------- | ----- | ---------- |  | - | -------
|                                                               |  | December 31,     |            | December 31,             
|                                                               |  | 2004             |            | 2005                      |       | 2004      
|                                                               |  | Thousands of yen |            | Thousands of U.S. dollars
|Cash                                                           |  | (Yen)            | 49,189,396 |                           | (Yen) | 52,665,059 |  | $ | 446,314
|Time deposits with original maturities of three months or less |  |                  | 3,718,961  |                           |       | 6,947,518  |  |   | 58,877 
|                                                               |  |                  |            |                           |       |            |  |   |        
|                                                               |  | (Yen)            | 52,908,357 |                           | (Yen) | 59,612,577 |  | $ | 505,191
|                                                               |  |                  |            |                           |       |            |  |   |        



6. Time deposits



The U.S. subsidiary had (Yen)26,720 thousand and (Yen)31,751 thousand, ($269 thousand) of
restricted cash set aside in accordance with the terms of building lease agreement as at December 31, 2004 and 2005, respectively. The restricted cash is included in time deposits.



7. Marketable securities and Securities investments



Marketable securities and securities investments include mutual funds and debt and equity securities for which the aggregate fair value,
gross unrealized gains and losses and cost pertaining to available-for-sale investments as of December 31, 2004 and 2005, were as follows:



|                    |  |                   |            |                  |       |         |  |            |         |  |       |           
|------------------- |  | ----------------- | ---------- | ---------------- | ----- | ------- |  | ---------- | ------- |  | ----- | ----------
|                    |  | December 31, 2004
|                    |  |                   |            | Gross unrealized |       |        
|                    |  | Cost              |            | Gains            |       | Losses  |  | Fair value
|                    |  | Thousands of yen 
|Available for sale: |  |                   |            |                  |       |         |  |            |         |  |       |           
|Mutual funds        |  | (Yen)             | 6,823,896  |                  | (Yen) | 466,020 |  | (Yen)      |        |  | (Yen) | 7,289,916 
|Equity securities   |  |                   |           |                  |       |        |  |            |        |  |       |          
|Debt securities     |  |                   | 17,142,091 |                  |       | 226,557 |  |            | 185,123 |  |       | 17,183,525
|                    |  |                   |            |                  |       |         |  |            |         |  |       |           
|Total               |  | (Yen)             | 23,965,987 |                  | (Yen) | 692,577 |  | (Yen)      | 185,123 |  | (Yen) | 24,473,441
|                    |  |                   |            |                  |       |         |  |            |         |  |       |           



F-18



---

|                    |  |                          |            |       |       |         |  |            |         |  |       |           
|------------------- |  | ------------------------ | ---------- | ----- | ----- | ------- |  | ---------- | ------- |  | ----- | ----------
|                    |  | December 31, 2005       
|                    |  | Gross unrealized        
|                    |  | Cost                     |            | Gains |       | Losses  |  | Fair value
|                    |  | Thousands of yen        
|Available for sale: |  |                          |            |       |       |         |  |            |         |  |       |           
|Mutual funds        |  | (Yen)                    | 8,825,910  |       | (Yen) | 310,291 |  | (Yen)      |        |  | (Yen) | 9,136,201 
|Equity securities   |  |                          |           |       |       |        |  |            |        |  |       |          
|Debt securities     |  |                          | 22,985,181 |       |       | 263,558 |  |            | 138,138 |  |       | 23,110,601
|                    |  |                          |            |       |       |         |  |            |         |  |       |           
|Total               |  | (Yen)                    | 31,811,091 |       | (Yen) | 573,849 |  | (Yen)      | 138,138 |  | (Yen) | 32,246,802
|                    |  |                          |            |       |       |         |  |            |         |  |       |           
|                    | 
|                    |  | December 31, 2005       
|                    |  | Gross unrealized        
|                    |  | Cost                     |            | Gains |       | Losses  |  | Fair value
|                    |  | Thousands of U.S dollars
|Available for sale: |  |                          |            |       |       |         |  |            |         |  |       |           
|Mutual funds        |  | $                        | 74,796     |       | $     | 2,630   |  | $          |        |  | $     | 77,426    
|Equity securities   |  |                          |           |       |       |        |  |            |        |  |       |          
|Debt securities     |  |                          | 194,790    |       |       | 2,233   |  |            | 1,171   |  |       | 195,852   
|                    |  |                          |            |       |       |         |  |            |         |  |       |           
|Total               |  | $                        | 269,586    |       | $     | 4,863   |  | $          | 1,171   |  | $     | 273,278   
|                    |  |                          |            |       |       |         |  |            |         |  |       |           



The contractual
maturities of available-for-sale debt securities as of December 31, 2005 were as follows:



|                             |  |                           |            |                      |       |           
|---------------------------- |  | ------------------------- | ---------- | -------------------- | ----- | ----------
|                             |  | Aggregated Par value      |            | Estimated Fair Value
|                             |  | Thousands of yen         
|Due less than one year       |  | (Yen)                     | 12,514,039 |                      | (Yen) | 12,488,684
|                             |  |                           |            |                      |       |           
|Due after one to two years   |  |                           | 6,284,669  |                      |       | 6,262,444 
|                             |  |                           |            |                      |       |           
|Due after two to three years |  |                           | 3,401,564  |                      |       | 3,334,781 
|                             |  |                           |            |                      |       |           
|Due after three years        |  |                           | 1,000,000  |                      |       | 1,024,692 
|                             |  |                           |            |                      |       |           
|Debt securities              |  | (Yen)                     | 23,200,272 |                      | (Yen) | 23,110,601
|                             |  |                           |            |                      |       |           
|                             |  |                          
|                             |  | Aggregated Par value      |            | Estimated Fair Value
|                             |  | Thousands of U.S. dollars
|Due less than one year       |  | $                         | 106,051    |                      | $     | 105,836   
|                             |  |                           |            |                      |       |           
|Due after one to two years   |  |                           | 53,260     |                      |       | 53,071    
|                             |  |                           |            |                      |       |           
|Due after two to three years |  |                           | 28,827     |                      |       | 28,261    
|                             |  |                           |            |                      |       |           
|Due after three years        |  |                           | 8,475      |                      |       | 8,684     
|                             |  |                           |            |                      |       |           
|Debt securities              |  | $                         | 196,613    |                      | $     | 195,852   
|                             |  |                           |            |                      |       |           



The net unrealized gain on
available-for-sale securities included in the separate component of shareholders equity, net of applicable taxes, increased by (Yen)177,733 thousand, (Yen)197,606 thousand and decreased by (Yen) 65,902 thousand ($558
thousand), in the years ended December 31, 2003, 2004 and 2005 respectively.



Proceeds from sales of available-for-sale securities for the years ended December 31, 2003, 2004 and 2005 were (Yen)2,945,331 thousand , (Yen)4,986,012 thousand and (Yen) 22,079,575 ($187,115 thousand), respectively.
Realized gains (losses) on sales of available-for-sale securities for the year ended December 31, 2003, 2004 and 2005 were (Yen)(65,259) thousand, (Yen)101,199 thousand and (Yen) 370,326 ($3,138 thousand) respectively.



F-19



---

The following table shows our investments gross unrealized losses and fair value, aggregated by investment category
and length of time that individual securities have been in a continuous unrealized loss position, at December 31, 2004 and 2005.



|                    |  |                     |  |                   |  |            |              |                  |  |              |  |                  |                 |  |  |             
|------------------- |  | ------------------- |  | ----------------- |  | ---------- | ------------ | ---------------- |  | ------------ |  | ---------------- | --------------- |  |  | ------------
|                    |  | December 31, 2004  
|                    |  | Less than 12 months |  | 12 Months or More |  | Total     
|                    |  | Thousands of yen   
|                    |  | Fair Value          |  | UnrealizedLosses  |  | Fair Value |              | UnrealizedLosses |  | Fair Value   |  | UnrealizedLosses
|Available for sale: |  |                     |  |                   |  |            |              |                  |  |              |  |                  |                 |  |  |             
|Mutual funds        |  | (Yen)              |  | (Yen)            |  |            | (Yen)       |                  |  | (Yen)       |  |                  | (Yen)          |  |  | (Yen)      
|                    |  |                     |  |                   |  |            |              |                  |  |              |  |                  |                 |  |  |             
|Equity securities   |  |                    |  |                  |  |            |             |                  |  |             |  |                  |                |  |  |            
|                    |  |                     |  |                   |  |            |              |                  |  |              |  |                  |                 |  |  |             
|Debt securities     |  | 9,308,944           |  | 25,410            |  |            | 833,114      |                  |  | 159,713      |  |                  | 10,142,058      |  |  | 185,123     
|                    |  |                     |  |                   |  |            |              |                  |  |              |  |                  |                 |  |  |             
|Total               |  | (Yen)9,308,944      |  | (Yen)25,410       |  |            | (Yen)833,114 |                  |  | (Yen)159,713 |  |                  | (Yen)10,142,058 |  |  | (Yen)185,123
|                    |  |                     |  |                   |  |            |              |                  |  |              |  |                  |                 |  |  |             

|                                                                                                                                                                                                                                                                                                                                    |  |  |  |  |  |  |  |  |  |  |  | 
|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |  |  |  |  |  |  |  |  |  |  |  | 
|Investments, which were in unrealized
loss positions as of December 31, 2004, are comprised of U.S. dollar and Euro denominated public debts.  The Company concluded that the impairments of these securities are not other than temporary in consideration of fluctuation of exchange rates and high
credit rating of the issuers.

|                    |  |                     |                 |                   |  |             |  |                  |                |            |  |                  |  |  |                 |  |  |             
|------------------- |  | ------------------- | --------------- | ----------------- |  | ----------- |  | ---------------- | -------------- | ---------- |  | ---------------- |  |  | --------------- |  |  | ------------
|                    |  | December 31, 2005  
|                    |  | Less than 12 months |                 | 12 Months or More |  | Total      
|                    |  | Thousands of yen   
|                    |  | Fair Value          |                 | UnrealizedLosses  |  | Fair Value  |  | UnrealizedLosses |                | Fair Value |  | UnrealizedLosses
|Available for sale: |  |                     |                 |                   |  |             |  |                  |                |            |  |                  |  |  |                 |  |  |             
|Mutual funds        |  |                     | (Yen)          |                   |  | (Yen)      |  |                  | (Yen)         |            |  | (Yen)           |  |  | (Yen)          |  |  | (Yen)      
|                    |  |                     |                 |                   |  |             |  |                  |                |            |  |                  |  |  |                 |  |  |             
|Equity securities   |  |                     |                |                   |  |            |  |                  |               |            |  |                 |  |  |                |  |  |            
|                    |  |                     |                 |                   |  |             |  |                  |                |            |  |                  |  |  |                 |  |  |             
|Debt securities     |  |                     | 10,766,393      |                   |  | 84,372      |  |                  | 3,223,769      |            |  | 53,766           |  |  | 13,990,162      |  |  | 138,138     
|                    |  |                     |                 |                   |  |             |  |                  |                |            |  |                  |  |  |                 |  |  |             
|Total               |  |                     | (Yen)10,766,393 |                   |  | (Yen)84,372 |  |                  | (Yen)3,223,769 |            |  | (Yen)53,766      |  |  | (Yen)13,990,162 |  |  | (Yen)138,138
|                    |  |                     |                 |                   |  |             |  |                  |                |            |  |                  |  |  |                 |  |  |             

|                    |  |                           |        |                   |   |           |  |                  |        |            |   |                  |  |   |         |  |   |      
|------------------- |  | ------------------------- | ------ | ----------------- | - | --------- |  | ---------------- | ------ | ---------- | - | ---------------- |  | - | ------- |  | - | -----
|                    |  |                           |       
|                    |  | Less than 12 months       |        | 12 Months or More |   | Total    
|                    |  | Thousands of U.S. dollars
|                    |  | FairValue                 |        | UnrealizedLosses  |   | FairValue |  | UnrealizedLosses |        | Fair Value |   | UnrealizedLosses
|Available for sale: |  |                           |        |                   |   |           |  |                  |        |            |   |                  |  |   |         |  |   |      
|Mutual funds        |  | $                         |       |                   | $ |          |  | $                |       |            | $ |                 |  | $ |        |  | $ |     
|                    |  |                           |        |                   |   |           |  |                  |        |            |   |                  |  |   |         |  |   |      
|Equity securities   |  |                           |       |                   |   |          |  |                  |       |            |   |                 |  |   |        |  |   |     
|                    |  |                           |        |                   |   |           |  |                  |        |            |   |                  |  |   |         |  |   |      
|Debt securities     |  |                           | 91,241 |                   |   | 715       |  |                  | 27,320 |            |   | 456              |  |   | 118,561 |  |   | 1,171
|                    |  |                           |        |                   |   |           |  |                  |        |            |   |                  |  |   |         |  |   |      
|Total               |  | $                         | 91,241 |                   | $ | 715       |  | $                | 27,320 |            | $ | 456              |  | $ | 118,561 |  | $ | 1,171
|                    |  |                           |        |                   |   |           |  |                  |        |            |   |                  |  |   |         |  |   |      



Investments, which were in unrealized
loss positions as of December 31, 2005, are comprised of U.S. dollar and Euro denominated public debts.



F-20



---

The Company concluded that the impairments of these securities are not other than temporary in consideration of
fluctuation of exchange rates and high credit rating of the issuers.



The
aggregate cost of the Companys cost method investments totaled (Yen) 123,648 thousand ($1,048 thousand) at December 31, 2005. All the cost method investments were not evaluated for impairment because (a) the Company did not
estimate the fair value of those investments in accordance with paragraphs 14 and 15 of SFAS 107 and (b) the Company did not identify any events or changes in circumstances that may have had a significant adverse effect on the fair value of
those investments.



8. Inventories



Inventories as at December 31, 2004 and 2005 consist of the following:



|               |  |                  |         |                          |       |         |  |   |      
|-------------- |  | ---------------- | ------- | ------------------------ | ----- | ------- |  | - | -----
|               |  | December 31,     |         | December 31,            
|               |  | 2004             |         | 2005                     |       | 2005   
|               |  | Thousands of yen |         | Thousands ofU.S. dollars
|Finished goods |  | (Yen)            | 170,033 |                          | (Yen) | 316,249 |  | $ | 2,680
|Raw materials  |  |                  | 31,210  |                          |       | 43,648  |  |   | 370  
|               |  |                  |         |                          |       |         |  |   |      
|               |  | (Yen)            | 201,243 |                          | (Yen) | 359,897 |  | $ | 3,050
|               |  |                  |         |                          |       |         |  |   |      



9. Investments in and transaction
with affiliated companies



Investees accounted for using the equity method
as of December 31, 2005 are SOFT TREND CAPITAL CORPORATION (20.0%) and Net Star Inc. (40.0%).



A summary of transactions and balances with the affiliated companies accounted for using the equity method is presented below:



|                                     |  |                          |         |                          |       |                          |  |       |         |  |   |      
|------------------------------------ |  | ------------------------ | ------- | ------------------------ | ----- | ------------------------ |  | ----- | ------- |  | - | -----
|                                     |  | Years ended December 31, |         | Year endedDecember 31,  
|                                     |  | 2003                     |         | 2004                     |       | 2005                     |  | 2005 
|                                     |  | Thousands of yen         |         | Thousands ofU.S. dollars
|Sales                                |  | (Yen)                    | 5,571   |                          | (Yen) | 6,482                    |  | (Yen) | 5,669   |  | $ | 48   
|                                     |  |                          |         |                          |       |                          |  |       |         |  |   |      
|Purchases                            |  | (Yen)                    | 189,175 |                          | (Yen) | 37,331                   |  | (Yen) | 314,517 |  | $ | 2,665
|                                     |  |                          |         |                          |       |                          |  |       |         |  |   |      
|                                     |  |                          |        
|                                     |  |                          |         | December 31,             |       | December 31,            
|                                     |  |                          |         | 2004                     |       | 2005                     |  | 2005 
|                                     |  |                          |         | Thousands of yen         |       | Thousands ofU.S. dollars
|Notes and accounts receivable, trade |  |                          |         |                          | (Yen) |                         |  | (Yen) |        |  | $ |     
|                                     |  |                          |         |                          |       |                          |  |       |         |  |   |      
|Other receivables                    |  |                          |         |                          | (Yen) | 1,901                    |  | (Yen) | 2,033   |  | $ | 17   
|                                     |  |                          |         |                          |       |                          |  |       |         |  |   |      
|Accounts payable, trade              |  |                          |         |                          | (Yen) |                         |  | (Yen) | 32,841  |  | $ | 278  
|                                     |  |                          |         |                          |       |                          |  |       |         |  |   |      



10. Sales rebates



Sales rebates recorded as a reduction of revenue were (Yen) 648,520 thousand, (Yen)
1,860,828 thousand and (Yen) 2,530,558 thousand ($ 21,445 thousand) for the years ended December 31, 2003, 2004 and 2005.



11. Research and development and maintenance costs, and software development costs



Research and development costs incurred up to the point where all substantial testing for the original English version product is complete,
are charged to income as operating expense. Such research and development costs charged to income were (Yen)1,725,400 thousand, (Yen)2,597,325 thousand and (Yen)4,395,207 ($37,248 thousand) for the years ended December 31, 2003, 2004 and 2005,
respectively.



Maintenance costs are fees, which relate to product version
updates to enable product to cope with newly prevailing computer viruses and bug fixing, are recorded as cost of sales. The maintenance costs included in cost of sales were (Yen)2,193,624 thousand, (Yen)2,260,934 thousand and (Yen)1,671,320
thousands ($14,164 thousand) for the years ended December 31, 2003, 2004 and 2005, respectively.



F-21



---

Software development costs relating to the local language related functions (representing software development costs as
shown in consolidated balance sheets) after netting the related accumulated amortization, are capitalized and amortized to cost of sales as follows:



|                             |  |                          |             |                          |       |           |  |       |           |  |   |        
|---------------------------- |  | ------------------------ | ----------- | ------------------------ | ----- | --------- |  | ----- | --------- |  | - | -------
|                             |  | Years ended December 31, |             | Year endedDecember 31,  
|                             |  | 2003                     |             | 2004                     |       | 2005      |  | 2004 
|                             |  | Thousands of yen         |             | Thousands ofU.S. dollars
|Software development costs:  |  |                          |             |                          |       |           |  |       |           |  |   |        
|Balance at beginning of year |  | (Yen)                    | 936,058     |                          | (Yen) | 505,616   |  | (Yen) | 438,464   |  | $ | 3,716  
|Additions, at cost           |  |                          | 788,760     |                          |       | 645,166   |  |       | 1,446,248 |  |   | 12,256 
|Amortization for the year    |  |                          | (1,219,202) |                          |       | (712,318) |  |       | (710,021) |  |   | (6,017)
|                             |  |                          |             |                          |       |           |  |       |           |  |   |        
|Balance at end of year       |  | (Yen)                    | 505,616     |                          | (Yen) | 438,464   |  | (Yen) | 1,174,691 |  | $ | 9,955  
|                             |  |                          |             |                          |       |           |  |       |           |  |   |        



12. Other intangibles



Other intangibles comprise the following:



|                              |  |                  |           |                          |       |           |  |   |        
|----------------------------- |  | ---------------- | --------- | ------------------------ | ----- | --------- |  | - | -------
|                              |  | December 31,     |           | December 31,            
|                              |  | 2004             |           | 2005                     |       | 2005     
|                              |  | Thousands of yen |           | Thousands ofU.S. dollars
|Purchased software            |  | (Yen)            | 1,147,237 |                          | (Yen) | 1,278,219 |  | $ | 10,832 
|Other                         |  |                  | 145,084   |                          |       | 810,938   |  |   | 6,873  
|                              |  |                  |           |                          |       |           |  |   |        
|                              |  |                  | 1,292,321 |                          |       | 2,089,157 |  |   | 17,705 
|LessAccumulated amortization |  |                  | (995,953) |                          |       | (698,723) |  |   | (5,921)
|                              |  |                  |           |                          |       |           |  |   |        
|                              |  | (Yen)            | 296,368   |                          | (Yen) | 1,390,434 |  | $ | 11,784 
|                              |  |                  |           |                          |       |           |  |   |        



The estimated aggregate amortization
expense for intangible assets during each of the five years in the period ending December 31, 2010 are as follows:



|                         |  |                  |         |                          |   |      
|------------------------ |  | ---------------- | ------- | ------------------------ | - | -----
|                         |  | Thousands of yen |         | Thousands ofU.S. dollars
|Year ending December 31: |  |                  |         |                          |   |      
|2006                     |  | (Yen)            | 481,980 |                          | $ | 4,085
|2007                     |  |                  | 392,230 |                          |   | 3,324
|2008                     |  |                  | 305,168 |                          |   | 2,586
|2009                     |  |                  | 133,458 |                          |   | 1,131
|2010                     |  |                  | 52,054  |                          |   | 441  



13. Debt



Debt comprises the following:



|                                                         |  |                  |             |                          |       |             |  |   |         
|-------------------------------------------------------- |  | ---------------- | ----------- | ------------------------ | ----- | ----------- |  | - | --------
|                                                         |  | December 31,     |             | December 31,            
|                                                         |  | 2004             |             | 2005                     |       | 2005       
|                                                         |  | Thousands of yen |             | Thousands ofU.S. dollars
|Bonds:                                                   |  |                  |             |                          |       |             |  |   |         
|Unsecured 1.9 % bonds, due 2006 with detachable warrants |  | (Yen)            | 4,000,000   |                          | (Yen) | 4,000,000   |  | $ | 33,898  
|                                                         |  |                  |             |                          |       |             |  |   |         
|                                                         |  |                  | 4,000,000   |                          |       | 4,000,000   |  |   | 33,898  
|Lesstreasury bonds:                                     |  |                  |             |                          |       |             |  |   |         
|Unsecured 1.9% bonds, due 2006 with detachable warrants  |  |                  | (4,000,000) |                          |       | (4,000,000) |  |   | (33,898)
|                                                         |  |                  |             |                          |       |             |  |   |         
|                                                         |  | (Yen)            |            |                          | (Yen) |            |  | $ |        
|                                                         |  |                  |             |                          |       |             |  |   |         



F-22



---

Based on the Companys incentive plans, the parent company issued unsecured bonds with detachable warrants and
bought all of the warrants at the same time for the purpose of distributing such instruments to the directors and certain employees of the parent company and its subsidiaries as a part of their remuneration.



The Japanese Commercial Code restricts redemptions and extinguishments of these bonds in case
the amount of each outstanding bond is less than the aggregate amount of the exercise price of each outstanding warrant. Therefore, in order to reduce interest costs, the parent company repurchased a part of the bonds through the market with an
intention to hold the treasury bonds until they can be extinguished legally. However, as the repurchase transaction is deemed as redemption of the bonds in substance, the treasury bonds are offset with the bonds on the face of consolidated balance
sheets. There was no repurchase transaction for the year ended December 31, 2004 and 2005.



14. Stock Option



Based on the
Companys 2002 incentive plans, the Company issued the following bonds with detachable warrants to the public.



|    |  |                                             |  |                                
|--- |  | ------------------------------------------- |  | -------------------------------
|1.  |  | Board meeting approval                      |  | March 26, 2002 April 2,
2002   
|2.  |  | Date of bond issuance                       |  | April 18, 2002                 
|3.  |  | Maturity date                               |  | April 18, 2006                 
|4.  |  | Amount of each bond (Thousands of yen)      |  | (Yen)4,000,000                 
|5.  |  | Issued to                                   |  | Public                         
|6.  |  | Date on which the bonds were fully redeemed |  |                               
|7.  |  | Exercise price per each warrant             |  | (Yen)3,450                     
|8.  |  | Warrant exercise period                     |  | April 3, 2003 to April 11, 2006
|9.  |  | Number of shares represented by warrants    |  | 1,159,420                      
|10. |  | Outstanding as of December 31, 2003         |  | 1,158,840                      
|11. |  | Outstanding as of December 31, 2004         |  | 737,391                        
|    |  |                                            
|12. |  | Outstanding as of December 31, 2005         |  | 575,942                        



Upon issuance of each bond, the
Company bought all of the warrants and distributed such instruments to the directors and certain employees of the Company and its subsidiaries as a part of their remuneration.



These transactions were accounted for as issuance of debt to the public, as an issuance of warrants to the directors and certain employees
of the Company and its subsidiaries. The issuance of warrants to the directors and employees was accounted for under APB 25.



F- 23



---

Warrant activity was as follows:



|                                                |  |                                            |  |                                 |      
|----------------------------------------------- |  | ------------------------------------------ |  | ------------------------------- | -----
|                                                |  | Thousands of sharesrepresented by warrants |  | Weighted-Average Exercise Price
|Outstanding at December 31, 2002                |  | 5,240                                      |  | (Yen)                           | 4,089
|Granted                                         |  |                                           |  |                                 |     
|Exercised                                       |  | 50                                         |  |                                 | 2,590
|Expired                                         |  | 637                                        |  |                                 | 7,850
|Cancelled                                       |  |                                           |  |                                 |     
|                                                |  |                                            |  |                                 |      
|Outstanding at December 31, 2003                |  | 4,553                                      |  |                                 | 3,579
|Granted                                         |  |                                           |  |                                 |     
|Exercised                                       |  | 2,018                                      |  |                                 | 2,770
|Expired                                         |  | 1,798                                      |  |                                 | 4,540
|Cancelled                                       |  |                                           |  |                                 |     
|                                                |  |                                            |  |                                 |      
|Outstanding at December 31, 2004                |  | 737                                        |  |                                 | 3,450
|Granted                                         |  |                                           |  |                                 |     
|Exercised                                       |  | 161                                        |  |                                 | 3,450
|Expired                                         |  |                                           |  |                                 |     
|Cancelled                                       |  |                                           |  |                                 |     
|                                                |  |                                            |  |                                 |      
|Outstanding at December 31, 2005                |  | 576                                        |  | (Yen)                           | 3,450
|                                                |  |                                            |  |                                 |      
|Exercisable Stock warrants at December 31, 2005 |  | 576                                        |  | (Yen)                           | 3,450



|                         |  |                                                               |  |                                           |  |                                |       |                                                               |     |                               |       |      
|------------------------ |  | ------------------------------------------------------------- |  | ----------------------------------------- |  | ------------------------------ | ----- | ------------------------------------------------------------- | --- | ----------------------------- | ----- | -----
|                         |  | Options Outstanding                                           |  | Options Exercisable                      
|Exercise Prices          |  | Thousands of sharesoutstanding at yearended December 31, 2005 |  | Weighted-AverageRemainingContractual Life |  | Weighted-AverageExercise Price |       | Thousands of sharesoutstanding at yearended December 31, 2005 |     | Weighed-AverageExercise Price
|(Yen)3,450 to (Yen)3,450 |  | 576                                                           |  | 0.28 years                                |  | (Yen)                          | 3,450 |                                                               | 576 |                               | (Yen) | 3,450



The
grants of April 18, 2002 did not result in deferred compensation.



Based
on the resolution of the extraordinary general shareholders meeting of the Company on September 12, 2002, Trend Micro adopted at the meeting of the board of directors on February 4, 2003 the following resolutions regarding Stock
acquisition rights to be issued to the directors and employees of the Company and its subsidiaries in order to introduce the stock option plan. In accordance with the terms of this plan, the Company granted options to purchase up to 1,999,500 shares
of the Companys common stock to certain directors and employees of the Company and its subsidiaries on February 12, 2003. The options granted are exercisable from November 1, 2003 through October 31, 2007.



Based on the resolution of the fourteenth ordinary general shareholders meeting of the
Company on March 26, 2003, Trend Micro adopted at the meeting of the board of directors on May 20, 2003 the following resolutions regarding Stock acquisition rights to be issued to the directors and employees of the Company and its
subsidiaries in order to introduce the stock option plan. In accordance with the terms of this plan, the Company granted options to purchase up to 2,500,000 shares of the Companys common stock to certain directors and employees of the Company
and its subsidiaries on May 28, 2003. The options granted are exercisable from May 28, 2004 through May 27, 2008.



Based on the resolution of the fourteenth ordinary general shareholders meeting of the Company on March 26, 2003, Trend Micro adopted at the meeting of the
board of directors on November 6, 2003 the following resolutions regarding Stock acquisition rights to be issued to the directors and employees of the Company and its subsidiaries in order to introduce the stock option plan. In accordance with
the terms of this plan, the Company granted options to purchase up to 1,500,000 shares of the Companys common stock to certain directors and employees of the Company and its subsidiaries on November 14, 2003. The options granted are
exercisable from November 14, 2004 through November 13, 2008.



F-24



---

Based on the resolution of the fifteenth ordinary general shareholders meeting of the Company on March 25,
2004, Trend Micro adopted at the meeting of the board of directors on April 20, 2004 the following resolutions regarding Stock acquisition rights to be issued to the directors and employees of the Company and its subsidiaries in order to
introduce the stock option plan. In accordance with the terms of this plan, the Company granted options to purchase up to 3,000,000 shares of the Companys common stock to certain directors and employees of the Company and its subsidiaries on
April 28, 2004. The options granted are exercisable from April 28, 2005 through April 27, 2009.



Based on the resolution of the fifteenth ordinary general shareholders meeting of the Company on March 25, 2004, Trend Micro adopted at the meeting of the board of directors on October 20, 2004 the
following resolutions regarding Stock acquisition rights to be issued to the directors and employees of the Company and its subsidiaries in order to introduce the stock option plan. In accordance with the terms of this plan, the Company granted
options to purchase up to 2,000,000 shares of the Companys common stock to certain directors and employees of the Company and its subsidiaries on October 28, 2004. The options granted are exercisable from October 28, 2005 through
October 27, 2009.



Based on the resolution of the sixteenth ordinary
general shareholders meeting of the Company on March 25, 2005, Trend Micro adopted at the meeting of the board of directors on July 14, 2005 the following resolutions regarding Stock acquisition rights in order to introduce the stock
option plan. In accordance with the terms of this plan, the Company granted options to purchase up to 3,457,500 shares of the Companys common stock to certain directors and employees of the Company and its subsidiaries on July 22, 2005.
The options granted are exercisable from July 22, 2006 through July 21, 2010.



Based on the resolution of the sixteenth ordinary general shareholders meeting of the Company on March 25, 2005, Trend Micro adopted at the meeting of the board of directors on December 6, 2005 the following resolutions
regarding Stock acquisition rights in order to introduce the stock option plan. In accordance with the terms of this plan, the Company granted options to purchase up to 2,500,000 shares of the Companys common stock to certain directors and
employees of the Company and its subsidiaries on December 14, 2005. The options granted are exercisable from December 14, 2006 through December 13, 2010.



Option activity under this plan was as follows:



|                                                          |  |                                           |  |                                 |      
|--------------------------------------------------------- |  | ----------------------------------------- |  | ------------------------------- | -----
|                                                          |  | Thousands of sharesrepresented by options |  | Weighted-Average Exercise Price
|Outstanding at December 31, 2002                          |  |                                          |  | (Yen)                           |     
|Granted                                                   |  | 6,000                                     |  |                                 | 2,232
|Exercised                                                 |  | 67                                        |  |                                 | 2,230
|Expired                                                   |  |                                          |  |                                 |     
|Cancelled                                                 |  |                                          |  |                                 |     
|                                                          |  |                                           |  |                                 |      
|Outstanding at December 31, 2003                          |  | 5,933                                     |  |                                 | 2,232
|Granted                                                   |  | 5,000                                     |  |                                 | 4,622
|Exercised                                                 |  | 1,390                                     |  |                                 | 2,205
|Expired                                                   |  |                                          |  |                                 |     
|Cancelled                                                 |  | 506                                       |  |                                 | 2,113
|                                                          |  |                                           |  |                                 |      
|Outstanding at December 31, 2004                          |  | 9,037                                     |  |                                 | 3,565
|Granted                                                   |  | 5,958                                     |  |                                 | 3,886
|Exercised                                                 |  | 796                                       |  |                                 | 2,271
|Expired                                                   |  |                                          |  |                                 |     
|Cancelled                                                 |  | 1,289                                     |  |                                 | 3,131
|                                                          |  |                                           |  |                                 |      
|Outstanding at December 31, 2005                          |  | 12,910                                    |  | (Yen)                           | 3,836
|                                                          |  |                                           |  |                                 |      
|Exercisable Stock acquisition rights at December 31, 2005 |  | 3,128                                     |  | (Yen)                           | 3,604



|                         |  |                                                               |  |                                           |  |                                |       |                                                               |       |                               |       |      
|------------------------ |  | ------------------------------------------------------------- |  | ----------------------------------------- |  | ------------------------------ | ----- | ------------------------------------------------------------- | ----- | ----------------------------- | ----- | -----
|                         |  | Options Outstanding                                           |  | Options Exercisable                      
|Exercise Prices          |  | Thousands of sharesoutstanding at yearended December 31, 2005 |  | Weighted-AverageRemainingContractual Life |  | Weighted-AverageExercise Price |       | Thousands of sharesoutstanding at yearended December 31, 2005 |       | Weighed-AverageExercise Price
|(Yen)1,955 to (Yen)3,200 |  | 2,482                                                         |  | 2.44 years                                |  | (Yen)                          | 2,261 |                                                               | 1,413 |                               | (Yen) | 2,324
|(Yen)3,200 to (Yen)5,090 |  | 10,428                                                        |  | 4.21                                      |  |                                | 4,211 |                                                               | 1,715 |                               |       | 4,658
|                         |  |                                                               |  |                                           |  |                                |       |                                                               |       |                               |       |      
|(Yen)1,955 to (Yen)5,090 |  | 12,910                                                        |  | 3.87                                      |  |                                | 3,836 |                                                               | 3,128 |                               |       | 3,604
|                         |  |                                                               |  |                                           |  |                                |       |                                                               |       |                               |       |      



F-25



---

The grants of Stock acquisition rights to the directors and employees were accounted for under APB No.25. The exercise
price per share for the rights granted of (Yen)2,230 issued on February 12, 2003 , (Yen)1,955 issued on May 28, 2003, (Yen) 2,695 issued on November 14, 2003, (Yen)4,310 issued on April 28,2004, (Yen)5,090 issued on
October 28,2004, (Yen)3,840 issued on July 22,2005 and (Yen)3,950 issued on December 14,2005 was determined as equivalent to the fair market value of the Companys share at the time of the grants. Consequently, the grant of the
Stock acquisition rights did not result in deferred compensation.



15.
Employee benefit plans



Pension and severance plans



The parent company has an unfunded retirement allowance
plan (Plan) covering substantially all of its employees who meet eligibility requirements under the Plan. Under the Plan, employees whose service with the company is terminated are, under most circumstances, entitled to lump-sum
severance indemnities, determined by reference to current basic rate of pay, length of service and conditions under which the termination occurs.



Additionally, the parent company has been a member of Kanto IT Software welfare pension plan, which is categorized as a multi-employer pension plan. Total
pension expense for multi-employer pension plan was (Yen) 84,824 thousand in 2003, (Yen) 83,833 thousand in 2004 and (Yen) 116,081 thousand ($984 thousand) in 2005, respectively.



Effective from March 1, 1998, the Taiwan subsidiary introduced a
defined benefit pension plan, which covers substantially all of its employees. Under the plan, only employees who are 55 years or older with services for more than 15 years or who have been employed for more than 25 years at the retirement date are
entitled to receive benefits. Benefits awarded under the plan are based primarily on current rate of pay and length of service.



Effective from July 2005, Taiwan subsidiaries had a defined contribution pension plan called Labor Pension Act (LPA). Some employees who had joined a
defined benefit pension plan transferred to the new plan. New employees who joined the Taiwan subsidiary after July 2005 can choose the new pension plan only.



Effective from July 1, 1998, the parent companys U.S. subsidiary has a 401(k) retirement plan, which covers substantially all of its
employees. Under the plan, employees contribute a certain percentage of their pre-tax salary up to the maximum dollar limitation prescribed by the United States Internal Revenue Code.



Total pension expense for the defined contribution pension plan in Taiwan and U.S. was (Yen) 43,679 thousand in 2003,
(Yen) 46,837 thousand in 2004 and (Yen) 129,644 thousand ($1,099 thousand) in 2005, respectively.



Certain other subsidiaries have defined benefit pension plans or retirement plans, which cover substantially all of their employees, under which the cost
of benefits is currently funded or accrued. Benefits awarded under these plans are based primarily on current rate of pay and length of service.



Information regarding the Japanese defined benefit pension plans of the Company based on unfunded plan is shown below:



|                                            |  |                  |          |                           |       |          |  |   |       |  
|------------------------------------------- |  | ---------------- | -------- | ------------------------- | ----- | -------- |  | - | ----- | -
|                                            |  | December 31,     |          | December 31,              |      
|                                            |  | 2004             |          | 2005                      |       | 2005     | 
|                                            |  | Thousands of yen |          | Thousands of U.S. dollars |      
|Change in benefit obligation:               |  |                  |          |                           |       |          |  |   |       |  
|Benefit obligation at beginning of year     |  | (Yen)            | 437,883  |                           | (Yen) | 467,571  |  | $ | 3,962 |  
|Service cost                                |  |                  | 143,711  |                           |       | 128,935  |  |   | 1,093 |  
|Interest cost                               |  |                  | 6,383    |                           |       | 6,731    |  |   | 57    |  
|Actuarial (gain)/loss                       |  |                  | (73,381) |                           |       | (7,486)  |  |   | (63   | )
|Benefits paid                               |  |                  | (47,025) |                           |       | (28,174) |  |   | (239  | )
|                                            |  |                  |          |                           |       |          |  |   |       |  
|Projected benefit obligation at end of year |  |                  | 467,571  |                           |       | 567,577  |  |   | 4,810 |  
|                                            |  |                  |          |                           |       |          |  |   |       |  
|Unrecognized net actuarial gain/(loss)      |  |                  | 30,498   |                           |       | 37,984   |  |   | 322   |  
|Unrecognized net transition obligation      |  |                  |         |                           |       |         |  |   |      |  
|                                            |  |                  |          |                           |       |          |  |   |       |  
|Accrued benefit cost                        |  | (Yen)            | 498,069  |                           | (Yen) | 605,561  |  | $ | 5,132 |  
|                                            |  |                  |          |                           |       |          |  |   |       |  



F-26



---

|                                                   |  |                          |         |                          |       |         |  |       |         |  |   |      
|-------------------------------------------------- |  | ------------------------ | ------- | ------------------------ | ----- | ------- |  | ----- | ------- |  | - | -----
|                                                   |  | Years ended December 31, |         | Year endedDecember 31,  
|                                                   |  | 2003                     |         | 2004                     |       | 2005    |  | 2005 
|                                                   |  | Thousands of yen         |         | Thousands ofU.S. dollars
|Components of net periodic benefit cost:           |  |                          |         |                          |       |         |  |       |         |  |   |      
|Service cost                                       |  | (Yen)                    | 131,173 |                          | (Yen) | 143,711 |  | (Yen) | 128,935 |  | $ | 1,093
|Interest cost                                      |  |                          | 4,997   |                          |       | 6,383   |  |       | 6,731   |  |   | 57   
|Amortization of unrecognized transition obligation |  |                          | 1,112   |                          |       | 311     |  |       |        |  |   |     
|Recognized actuarial loss                          |  |                          | 2,323   |                          |       |        |  |       |        |  |   |     
|                                                   |  |                          |         |                          |       |         |  |       |         |  |   |      
|Net periodic pension cost                          |  | (Yen)                    | 139,605 |                          | (Yen) | 150,405 |  | (Yen) | 135,666 |  | $ | 1,150
|                                                   |  |                          |         |                          |       |         |  |       |         |  |   |      



|                               |  |                          |         |                          |       |         |  |   |      
|------------------------------ |  | ------------------------ | ------- | ------------------------ | ----- | ------- |  | - | -----
|                               |  | Years ended December 31,
|                               |  | 2004                     |         | 2005                     |       | 2005   
|                               |  | Thousands of yen         |         | Thousands ofU.S. dollars
|Accumulated benefit obligation |  | (Yen)                    | 309,559 |                          | (Yen) | 404,187 |  | $ | 3,425



|                                                                  |  |              |   |  |      |  
|----------------------------------------------------------------- |  | ------------ | - |  | ---- | -
|                                                                  |  | December 31, |  
|                                                                  |  | 2004         |   |  | 2005 |  
|Assumptions used to determine benefit obligations at December 31: |  |              |   |  |      |  
|Discount rate                                                     |  | 1.50         | % |  | 1.00 | %
|Rate of compensation increase                                     |  | 5.50         | % |  | 4.32 | %



|                                                                                     |  |              |   |  |      |   |  |      |  
|------------------------------------------------------------------------------------ |  | ------------ | - |  | ---- | - |  | ---- | -
|                                                                                     |  | December 31, |  
|                                                                                     |  | 2003         |   |  | 2004 |   |  | 2005 |  
|Assumptions used to determine net periodic benefit cost for years ended December 31: |  |              |   |  |      |   |  |      |  
|Discount rate                                                                        |  | 2.00         | % |  | 1.50 | % |  | 1.50 | %
|Rate of compensation increase                                                        |  | 5.50         | % |  | 5.50 | % |  | 5.50 | %



The
following benefit payments, which reflected expected future service, as appropriate, are expected to be paid:



|                                                           |  |                  |         |                          |   |      
|---------------------------------------------------------- |  | ---------------- | ------- | ------------------------ | - | -----
|                                                           |  | Thousands of yen |         | Thousands ofU.S. dollars
|Estimated Future Benefit Payments Year ending December 31: |  |                  |         |                          |   |      
|2006                                                       |  | (Yen)            | 40,455  |                          | $ | 343  
|2007                                                       |  |                  | 47,944  |                          |   | 406  
|2008                                                       |  |                  | 58,950  |                          |   | 500  
|2009                                                       |  |                  | 70,984  |                          |   | 602  
|2010                                                       |  |                  | 71,777  |                          |   | 608  
|2011-2015                                                  |  |                  | 474,757 |                          |   | 4,023



The measurement date used to determine
above plans are November 30, 2004 and November 30, 2005, respectively.



F-27



---

Information regarding the defined benefit pension plans for consolidated foreign subsidiaries is shown below:



|                                               |  |                  |           |                          |       |           |  |   |        |  
|---------------------------------------------- |  | ---------------- | --------- | ------------------------ | ----- | --------- |  | - | ------ | -
|                                               |  | December 31,     |           | December 31,             |      
|                                               |  | 2004             |           | 2005                     |       | 2005      | 
|                                               |  | Thousands of yen |           | Thousands ofU.S. dollars |      
|Change in benefit obligation:                  |  |                  |           |                          |       |           |  |   |        |  
|Benefit obligation at beginning of year        |  | (Yen)            | 296,439   |                          | (Yen) | 442,716   |  | $ | 3,752  |  
|Service cost                                   |  |                  | 78,024    |                          |       | 56,546    |  |   | 479    |  
|Interest cost                                  |  |                  | 9,220     |                          |       | 16,135    |  |   | 137    |  
|Actuarial (gain)/loss                          |  |                  | 56,903    |                          |       | 128,070   |  |   | 1,085  |  
|Benefits paid                                  |  |                  | (2,516)   |                          |       |          |  |   |       |  
|Foreign currency exchange impact               |  |                  | 4,646     |                          |       | 48,542    |  |   | 411    |  
|                                               |  |                  |           |                          |       |           |  |   |        |  
|Projected benefit obligation at end of year    |  |                  | 442,716   |                          |       | 692,009   |  |   | 5,864  |  
|                                               |  |                  |           |                          |       |           |  |   |        |  
|Change in plan assets:                         |  |                  |           |                          |       |           |  |   |        |  
|Fair value of plan assets at beginning of year |  |                  | (95,322)  |                          |       | (124,552) |  |   | (1,056 | )
|Actual return on plan assets                   |  |                  | (1,305)   |                          |       | (2,231)   |  |   | (19    | )
|Employer contribution                          |  |                  | (28,637)  |                          |       | (28,464)  |  |   | (241   | )
|Benefits paid                                  |  |                  | 2,516     |                          |       |          |  |   |       |  
|Foreign currency exchange impact               |  |                  | (1,804)   |                          |       | (13,111)  |  |   | (111   | )
|                                               |  |                  |           |                          |       |           |  |   |        |  
|Fair value of plan assets at end of year       |  |                  | (124,552) |                          |       | (168,358) |  |   | (1,427 | )
|                                               |  |                  |           |                          |       |           |  |   |        |  
|Funded status                                  |  |                  | 318,164   |                          |       | 523,651   |  |   | 4,437  |  
|Unrecognized prior service cost                |  |                  | (49,923)  |                          |       | (31,059)  |  |   | (263   | )
|Unrecognized net actuarial loss                |  |                  | (110,269) |                          |       | (249,439) |  |   | (2,114 | )
|                                               |  |                  |           |                          |       |           |  |   |        |  
|Accrued benefit cost                           |  | (Yen)            | 157,972   |                          | (Yen) | 243,153   |  | $ | 2,060  |  
|                                               |  |                  |           |                          |       |           |  |   |        |  



|                                         |  |                          |         |                          |       |         |  |       |         |  |   |     |  
|---------------------------------------- |  | ------------------------ | ------- | ------------------------ | ----- | ------- |  | ----- | ------- |  | - | --- | -
|                                         |  | Years ended December 31, |         | Year endedDecember 31,   |      
|                                         |  | 2003                     |         | 2004                     |       | 2005    |  | 2005  |        
|                                         |  | Thousands of yen         |         | Thousands ofU.S. dollars |      
|Components of net periodic benefit cost: |  |                          |         |                          |       |         |  |       |         |  |   |     |  
|Service cost                             |  | (Yen)                    | 51,978  |                          | (Yen) | 78,024  |  | (Yen) | 56,546  |  | $ | 479 |  
|Interest cost                            |  |                          | 8,954   |                          |       | 9,220   |  |       | 16,135  |  |   | 137 |  
|Expected return on plan assets           |  |                          | (3,450) |                          |       | (3,614) |  |       | (4,943) |  |   | (42 | )
|Amortization of prior service cost       |  |                          | 1,072   |                          |       | 2,444   |  |       | 2,953   |  |   | 25  |  
|Recognized actuarial loss                |  |                          | 2,425   |                          |       | 1,004   |  |       | 3,341   |  |   | 28  |  
|Amendments                               |  |                          |        |                          |       |        |  |       | 20,220  |  |   | 171 |  
|                                         |  |                          |         |                          |       |         |  |       |         |  |   |     |  
|Net periodic pension cost                |  | (Yen)                    | 60,979  |                          | (Yen) | 87,078  |  | (Yen) | 94,252  |  | $ | 798 |  
|                                         |  |                          |         |                          |       |         |  |       |         |  |   |     |  



|                               |  |                          |         |                          |       |         |  |   |      
|------------------------------ |  | ------------------------ | ------- | ------------------------ | ----- | ------- |  | - | -----
|                               |  | Years ended December 31,
|                               |  | 2004                     |         | 2005                     |       | 2005   
|                               |  | Thousands of yen         |         | Thousands ofU.S. dollars
|Accumulated benefit obligation |  | (Yen)                    | 209,810 |                          | (Yen) | 324,192 |  | $ | 2,747



|                                                                  |  |              |   |  |      |  
|----------------------------------------------------------------- |  | ------------ | - |  | ---- | -
|                                                                  |  | December 31, |  
|                                                                  |  | 2004         |   |  | 2005 |  
|Assumptions used to determine benefit obligations at December 31: |  |              |   |  |      |  
|Discount rate                                                     |  | 3.25         | % |  | 2.50 | %
|Rate of compensation increase                                     |  | 4.00         | % |  | 4.00 | %



|                                                                                     |  |              |   |  |      |   |  |      |  
|------------------------------------------------------------------------------------ |  | ------------ | - |  | ---- | - |  | ---- | -
|                                                                                     |  | December 31, |  
|                                                                                     |  | 2003         |   |  | 2004 |   |  | 2005 |  
|Assumptions used to determine net periodic benefit cost for years ended December 31: |  |              |   |  |      |   |  |      |  
|Discount rate                                                                        |  | 4.00         | % |  | 3.25 | % |  | 3.25 | %
|Expected return on plan assets                                                       |  | 4.00         | % |  | 3.25 | % |  | 3.25 | %
|Rate of compensation increase                                                        |  | 4.50         | % |  | 3.75 | % |  | 4.00 | %



F-28



---

The measurement date used to determine above plans are December 31, 2004 and
December 31, 2005, respectively.



Asset
Allocation



|                   |  |              
|------------------ |  | -------------
|                   |  | December 31, 
|                   |  | 2005         
|                   |  | Allocation(%)
|Type of investment |  |              
|Cash               |  | 49.32        
|Government Loan    |  | 5.80         
|Equity             |  | 20.05        
|Notes              |  | 13.90        
|Bonds              |  | 10.93        
|                   |  |              
|Total              |  | 100.00       



The Company has no control over the
investment, since a government appointed manager and custodian manages them. Expected return on assets of 3.25% used to determine net periodic benefit cost for years ended December 31, 2005 was determined based on the information provided by
the above-mentioned government appointed manager and custodian. Historical returns are taken into consideration.



The Company expects to contribute (Yen) 29,531 thousand ($250 thousand) to its pension plan in 2006.



F-29



---

The following benefit payments, which reflected expected future service, as appropriate, are expected to be paid:



|                                                           |  |                  |        |                          |   |    
|---------------------------------------------------------- |  | ---------------- | ------ | ------------------------ | - | ---
|                                                           |  | Thousands of yen |        | Thousands ofU.S. dollars
|Estimated Future Benefit Payments Year ending December 31: |  |                  |        |                          |   |    
|2006                                                       |  | (Yen)            | 275    |                          | $ | 2  
|2007                                                       |  |                  | 293    |                          |   | 2  
|2008                                                       |  |                  | 314    |                          |   | 3  
|2009                                                       |  |                  | 339    |                          |   | 3  
|2010                                                       |  |                  | 368    |                          |   | 3  
|2011-2015                                                  |  |                  | 21,609 |                          |   | 183



Under the Japanese Commercial Code and
local practice, the Company may make severance payments to a retired director or corporate auditor with shareholder approval, if the Companys management proposes such payments based on a resolution of the Board of Directors. The Company does
have an internal rule to determine the amounts of severance payments to corporate auditors, and in accordance with this rule, retirement benefits for corporate auditors are provided at an estimate of the amount to be paid if all eligible corporate
auditors resigned at the balance sheet date.



Post-retirement benefits other than pensions and post-employment benefits



The Company does not provide health care or life insurance benefits to retired employees, nor does it provide benefits to former or inactive employees after employment but before retirement.



F-30



---

16. Income taxes



Income before income taxes and provision for income taxes comprise the following:



|                            |  |                          |             |                           |       |             |  |       |             |  |   |         |  
|--------------------------- |  | ------------------------ | ----------- | ------------------------- | ----- | ----------- |  | ----- | ----------- |  | - | ------- | -
|                            |  | Years ended December 31, |             | Year ended December 31,   |      
|                            |  | 2003                     |             | 2004                      |       | 2005        |  | 2005  |            
|                            |  | Thousands of yen         |             | Thousands of U.S. dollars |      
|Income before income taxes: |  |                          |             |                           |       |             |  |       |             |  |   |         |  
|Domestic                    |  | (Yen)                    | 9,328,185   |                           | (Yen) | 14,190,169  |  | (Yen) | 16,562,581  |  | $ | 140,361 |  
|Foreign subsidiaries        |  |                          | 6,000,802   |                           |       | 12,134,817  |  |       | 12,545,719  |  |   | 106,320 |  
|                            |  |                          |             |                           |       |             |  |       |             |  |   |         |  
|                            |  | (Yen)                    | 15,328,987  |                           | (Yen) | 26,324,986  |  | (Yen) | 29,108,300  |  | $ | 246,681 |  
|                            |  |                          |             |                           |       |             |  |       |             |  |   |         |  
|Income taxes, current:      |  |                          |             |                           |       |             |  |       |             |  |   |         |  
|Domestic                    |  | (Yen)                    | 6,531,627   |                           | (Yen) | 9,814,296   |  | (Yen) | 8,626,580   |  | $ | 73,107  |  
|Foreign subsidiaries        |  |                          | 905,949     |                           |       | 2,079,363   |  |       | 3,236,547   |  |   | 27,428  |  
|                            |  |                          |             |                           |       |             |  |       |             |  |   |         |  
|                            |  | (Yen)                    | 7,437,576   |                           | (Yen) | 11,893,659  |  | (Yen) | 11,863,127  |  | $ | 100,535 |  
|                            |  |                          |             |                           |       |             |  |       |             |  |   |         |  
|Income taxes, deferred:     |  |                          |             |                           |       |             |  |       |             |  |   |         |  
|Domestic                    |  | (Yen)                    | (1,260,644) |                           | (Yen) | (1,548,781) |  | (Yen) | (336,252)   |  | $ | (2,849  | )
|Foreign subsidiaries        |  |                          | (74,354)    |                           |       | 158,394     |  |       | (1,022,316) |  |   | (8,664) |  
|                            |  |                          |             |                           |       |             |  |       |             |  |   |         |  
|                            |  | (Yen)                    | (1,334,998) |                           | (Yen) | (1,390,387) |  | (Yen) | (1,358,568) |  | $ | (11,513 | )
|                            |  |                          |             |                           |       |             |  |       |             |  |   |         |  



Reconciliation of the differences
between the statutory tax rate and the effective income tax rate is as follows:



|                                                               |  |                          |   |  |      |   |  |      |  
|-------------------------------------------------------------- |  | ------------------------ | - |  | ---- | - |  | ---- | -
|                                                               |  | Years ended December 31, |  
|                                                               |  | 2003                     |   |  | 2004 |   |  | 2005 |  
|Statutory tax rate:                                            |  | 42.1                     | % |  | 42.1 | % |  | 41.0 | %
|Increase (reduction) in rate resulting from                   |  |                          |   |  |      |   |  |      |  
|Different tax rates applied to foreign subsidiaries            |  | (1.3                     | ) |  | (2.0 | ) |  | (2.0 | )
|Effect of change in statutory tax rate                         |  | 0.3                      |   |  | 0.8  |   |  |     |  
|State income taxes, net of federal tax                         |  | 0.4                      |   |  | 0.3  |   |  | (0.5 | )
|Permanent difference                                           |  | 1.5                      |   |  | 0.6  |   |  | 1.2  |  
|Tax credit relating to Tax law applied to Parent company       |  | (1.3                     | ) |  | (1.2 | ) |  | (1.7 | )
|Tax credit relating to Tax law applied to foreign subsidiaries |  | (1.1                     | ) |  | (1.1 | ) |  | (2.0 | )
|Other                                                          |  | (0.8                     | ) |  | 0.4  |   |  | 0.1  |  
|Effective income tax rate                                      |  | 39.8                     | % |  | 39.9 | % |  | 36.1 | %



On March 31, 2003, in Japan, the
Law to Partially Revise the Local Tax Law was promulgated, which introduced the pro forma standard taxation system on April 1, 2004. As a result of the change in tax laws, a new statutory income tax rate was reduced to 41.0%. For the parent
company, this new statutory rate is effective from the fiscal year ending December 31, 2005. The Company recalculated deferred tax assets and liabilities for temporary differences scheduled to be realized after January 1st, 2005. Since in
2004 all of the current portions of deferred tax assets and liabilities had an expected realization after the effective date of this new statutory rate, this recalculation composed the majority of Effect of change in statutory rate
above.



F-31



---

The significant components of deferred income tax assets and liabilities at
December 31, 2004 and 2005 were as follows:



|                                                  |  |                  |           |                           |       |           |  |   |        
|------------------------------------------------- |  | ---------------- | --------- | ------------------------- | ----- | --------- |  | - | -------
|                                                  |  | December 31,     |           | December 31,             
|                                                  |  | 2004             |           | 2005                      |       | 2004     
|                                                  |  | Thousands of yen |           | Thousands of U.S. dollars
|Deferred tax assets:                              |  |                  |           |                           |       |           |  |   |        
|Deferred revenue                                  |  | (Yen)            | 5,637,865 |                           | (Yen) | 6,741,968 |  | $ | 57,135 
|Allowance for doubtful accounts and sales returns |  |                  | 242,803   |                           |       | 172,096   |  |   | 1,458  
|Accrued enterprise tax                            |  |                  | 579,418   |                           |       | 262,614   |  |   | 2,226  
|Accrued liabilities                               |  |                  | 524,571   |                           |       | 617,593   |  |   | 5,234  
|Tax loss carry forward                            |  |                  | 62,652    |                           |       | 99,907    |  |   | 847    
|Amortization of intangibles                       |  |                  | 388,305   |                           |       | 410,444   |  |   | 3,478  
|Impairment of securities investments              |  |                  | 242,676   |                           |       | 242,676   |  |   | 2,057  
|Allowance for retirement                          |  |                  | 234,829   |                           |       | 297,361   |  |   | 2,520  
|Net unrealized gain on debt & equity securities   |  |                  | (209,556) |                           |       | (472,295) |  |   | (4,003)
|Other                                             |  |                  | 398,637   |                           |       | 409,183   |  |   | 3,468  
|                                                  |  |                  |           |                           |       |           |  |   |        
|Gross deferred tax assets                         |  |                  | 8,102,200 |                           |       | 8,781,547 |  |   | 74,420 
|Less: Valuation allowance                         |  |                  | (181,457) |                           |       | (20,830)  |  |   | (177)  
|                                                  |  |                  |           |                           |       |           |  |   |        
|                                                  |  | (Yen)            | 7,920,743 |                           | (Yen) | 8,760,717 |  | $ | 74,243 
|                                                  |  |                  |           |                           |       |           |  |   |        



Deferred tax assets are included in
the consolidated balance sheets as follows:



|                                                  |  |                  |           |                           |       |           |  |   |       
|------------------------------------------------- |  | ---------------- | --------- | ------------------------- | ----- | --------- |  | - | ------
|                                                  |  | December 31,     |           | December 31              
|                                                  |  | 2004             |           | 2005                      |       | 2004     
|                                                  |  | Thousands of yen |           | Thousands of U.S. dollars
|Current assetsDeferred income taxes              |  | (Yen)            | 6,224,972 |                           | (Yen) | 6,727,229 |  | $ | 57,010
|Investment and other assetsDeferred income taxes |  |                  | 1,695,771 |                           |       | 2,033,488 |  |   | 17,233
|                                                  |  |                  |           |                           |       |           |  |   |       
|Deferred tax assets                               |  | (Yen)            | 7,920,743 |                           | (Yen) | 8,760,717 |  | $ | 74,243
|                                                  |  |                  |           |                           |       |           |  |   |       



The valuation allowance mainly relates
to deferred tax assets of consolidated subsidiaries with operating loss carry forwards for tax purposes that are not expected to be realized. The net changes in the total valuation allowance for the years ended December 31, 2003, 2004 and 2005
were a decrease of (Yen) 31,237 thousand, an increase of (Yen) 22,615 thousand and a decrease of (Yen) 160,627 thousand ($1,361 thousand), respectively.



Operating loss carryforwards for tax purposes of consolidated subsidiaries at December 31, 2005 amounted to approximately (Yen)
799,252 thousand ($6,773 thousand) and are available as an offset against future taxable income of the subsidiary. These carryforwards wont expire based on the tax law of the subsidiary. Realization is dependent on this subsidiary
generating sufficient taxable income. Although realization is not assured, management believes it is more likely than not that all of the deferred tax assets, less the valuation allowance, will be realized. The amount of such net deferred tax assets
considered realizable, however, could change in the near term if estimates of future taxable income during the carry forward period change.



At December 31, 2005, no deferred income taxes have been provided on undistributed earnings of foreign subsidiaries not expected to be remitted in the foreseeable
future totaling (Yen) 17,986,161 thousand ($152,425 thousand), as management of the Company intends to reinvest undistributed earnings of the Companys foreign subsidiaries. The unrecognized deferred tax liabilities as of December 31,
2005 for such undistributed earnings amounted to (Yen) 1,664,793 thousand ($14,108 thousand).



17. Shareholders equity



Changes
in the number of shares of common stock issued have resulted from the following:



|                                                                 |  |                          |  |             |  |            
|---------------------------------------------------------------- |  | ------------------------ |  | ----------- |  | -----------
|                                                                 |  | Years ended December 31,
|                                                                 |  | 2003                     |  | 2004        |  | 2005       
|Shares of common stock issued:                                   |  |                          |  |             |  |            
|Balance at beginning of year                                     |  | 132,503,417              |  | 132,620,100 |  | 135,755,872
|Exercise of stock purchase warrants and stock acquisition rights |  | 116,683                  |  | 3,135,772   |  | 847,853    
|                                                                 |  |                          |  |             |  |            
|Balance at end of year                                           |  | 132,620,100              |  | 135,755,872 |  | 136,603,725
|                                                                 |  |                          |  |             |  |            



F-32



---

Upon exercise of stock warrants and stock acquisition rights, 50,183 shares of common stock at an exercise price of
(Yen)2,590 per share and 66,500 shares of common stock at an exercise price of (Yen)2,230 per share were issued and the common stock account and the additional paid-in capital account of the Company increased by (Yen)139,134 thousand and
(Yen)139,135 thousand, respectively, in the year ended December 31, 2003.



Upon exercise of stock warrants and stock acquisition rights, 1,596,630 shares of common stock at an exercise price of (Yen)2,590 per share, 421,142 shares of common stock at an exercise price of (Yen)3,450 per share, 534,000 shares of
common stock at an exercise price of (Yen)2,230 per share, 394,500 shares of common stock at an exercise price of (Yen)1,955 per share, and 189,500 shares of common stock at an exercise price of (Yen)2,695 per share were issued and the common stock
account and the additional paid-in capital account of the Company increased by (Yen)4,030,783 thousand and (Yen)4,030,198 thousand, respectively, in the year ended December 31, 2004.



Upon exercise of stock warrants and stock acquisition rights, 161,353 shares of common stock at an exercise price of (Yen)3,450 per share,
219,500 shares of common stock at an exercise price of (Yen)2,230 per share, 256,000 shares of common stock at an exercise price of (Yen)1,955 per share, and 211,000 shares of common stock at an exercise price of (Yen)2,695 per share were issued and
the common stock account and the additional paid-in capital account of the Company increased by (Yen)1,057,872 thousand ($8,965 thousand) and (Yen)1,057,405 thousand ($8,961 thousand), respectively, in the year ended December 31, 2005.



Under the Japanese Commercial Code, the amount available for dividends is
based on retained earnings as recorded in the books of the Company prepared in accordance with Japanese Commercial Code requirements. However, certain adjustments, not recorded in the Companys books, are reflected in the financial statements
as described in Note 2.



The Japanese Commercial Code provides that an amount
equal to at least 10% of cash dividends and other distributions from retained earnings paid by the parent company and its Japanese subsidiaries be appropriated as a legal reserve. Prior to the amendments to the Japanese Commercial Code in 2001, no
further appropriation was required when the legal reserve equals 25% of the stated capital. However, as a result of the amendments effective from October 1, 2001, no further appropriation is required when the aggregated amount of the additional
paid-in-capital and the legal reserve equals 25% of the stated capital. The amounts of statutory retained earnings of the parent company available for the payment of dividends to stockholders as of December 31, 2004 and 2005 were
(Yen)21,800,332 thousand and (Yen)30,234,531 thousand ($256,225 thousand), respectively.



Cash dividends during the three years ended December 31, 2005 represent dividends paid out during the periods. The accompanying consolidated financial statements do not include any provision for the dividend of
Yen) 56 per share, totaling (Yen) 7,509 million ($63,636 thousands) planned to be proposed in March 2006 in respect of the year ended December 31, 2005.



In September 2003, the Japanese Commercial Code was modified. The new Japanese Commercial Code allows the Company to purchase treasury stock
for any reason at any time by the resolution of the Board of Directors up to the limitation of statutory retained earnings of the parent company available for the payment of interim dividends to stockholders. On March 25, 2004, the shareholders
of the parent company approved to amend the articles of incorporation in order to apply this new rule.



The Company repurchased 33,792 shares as treasury stock and issued 109,000 shares of treasury stock in case of exercising stock warrants in 2005.



The Japanese Commercial Code permits a Company to distribute profits by way of interim or year-end dividends under certain conditions.



Total accumulated other comprehensive income as of December 31, 2004 and
2005 was a net debit balances of (Yen)322,115 thousand and a net credit balance of (Yen)2,117,485 thousand ($17,945 thousand), respectively.



F-33



---

18. Financial instruments



(1) Derivative instruments



The Company has a policy not to utilize any derivative financial instruments with off-balance sheet risk. In accordance with the policy, the parent company and its
subsidiaries did not employ any derivative financial instruments.



(2) Fair
value of financial instruments



Other than debt and equity securities, the
fair value of which are disclosed in Marketable securities and securities investments, the Companys involvement in financial assets and liabilities with market risk is limited to cash and cash equivalents, time deposits, notes and
accounts receivable, trade, notes and accounts payable, trade, and long-term debt. The estimated fair value of cash and cash equivalents, time deposits, notes and accounts receivable, trade, and notes and accounts payable, trade are carried at
amounts, which approximate fair value. At December 31,2004 and 2005, there was substantially no long-term debt including the current portion.



19. Advertising costs



Advertising costs included in Operating expenses were (Yen) 2,511,704 thousand, (Yen) 3,452,434 thousand and (Yen) 4,777,936 thousand ($40,491 thousand) for the years ended December 31, 2003, 2004
and 2005, respectively.



20. Customer support costs



Customer support costs are primarily payroll, related expenses and outsourced customer
service fees, which relate to activities such as maintenance of customers database, education promotions to customers, investigation for appropriate customer support methodologies, responses to customers questions and sales promotions to
customers via telephone. Customer support costs in cost of sales were (Yen) 4,830,660 thousand, (Yen) 5,723,426 thousand and (Yen) 6,857,901 thousand ($58,118 thousand) for the years ended December 31, 2003, 2004 and 2005,
respectively.



21. Leases



Rental expenses under operating leases for the year ended December 31 2003, 2004 and
2005 were (Yen) 1,438,801 thousand, (Yen) 1,396,590 thousand, and (Yen) 1,371,135 thousand($11,620 thousand), respectively. The minimum rental payments required under operating leases that have initial or remaining non- cancelable lease
terms at December 31, 2005 are as follows:



|                                    |  |                  |           |                          |   |       
|----------------------------------- |  | ---------------- | --------- | ------------------------ | - | ------
|                                    |  | Thousands of yen |           | Thousands ofU.S. dollars
|Year ending December 31:            |  |                  |           |                          |   |       
|2006                                |  | (Yen)            | 1,049,277 |                          | $ | 8,892 
|2007                                |  |                  | 390,200   |                          |   | 3,307 
|2008                                |  |                  | 323,558   |                          |   | 2,742 
|2009                                |  |                  | 64,946    |                          |   | 551   
|2010                                |  |                  | 31,411    |                          |   | 266   
|                                    |  |                  |           |                          |   |       
|Total minimum future lease payments |  | (Yen)            | 1,859,392 |                          | $ | 15,758
|                                    |  |                  |           |                          |   |       



22. Commitments and contingent
liabilities



The Company provides a service based on Service level
agreement (the Agreement) where the Company guarantees a certain level of services rendered to customers. The Company is required to pay penalties up to the limited amounts defined in the Agreement if the Company cannot perform the
services as specified in the Agreement. Based on yearly experiences of payment, the Company has established no liabilities for specific liabilities as of December 31, 2004 and 2005.



Effect on Our Results of Operations from Distribution of a Defective Virus Pattern File in April 2005



On April 23 2005, the Company distributed a defective virus pattern file that resulted
in damage to the computers of our customers who downloaded the file. As a result, we took steps to resolve our customers problems and ensure that a similar problem would not reoccur. We have incurred (Yen) 991 million ($8,398 thousand)
related to this issue for the year ended December 31, 2005 as cost of sales and operating expenses. There is some possibility of incurring further cost, however Management expects additional cost will be insignificant.



F-34



---

23. Segment Information



The Company has been specializing in the Security software business.



The Company discloses Operating Segment information as required by FAS 131 Disclosures
about Segments of an Enterprise and Related Information. The information now provided to the chief operating decision maker for assessing the Companys performance includes 5 regional segments and a corporate segment. The five operating
segments by region are Japan, North America, Europe, Asia Pacific and Latin America. The other operating segment is Corporate, which is comprised of Research and development, Marketing, Customer support and Administrative departments that operate
and bring benefits to the Company worldwide.



Below is summarized information
of our operating segments sales, operating income (loss) and total assets. Corporate assets are mainly cash, marketable securities, and software used to develop our products. These figures comply with the accounting policies disclosed in the
Notes to these consolidated financial statements.



|                                 |  |                        |              |                           |       |                          |  |       |              |  |   |          
|-------------------------------- |  | ---------------------- | ------------ | ------------------------- | ----- | ------------------------ |  | ----- | ------------ |  | - | ---------
|                                 |  | Year ended December 31 |              | Year endedDecember31,    
|                                 |  | 2003                   |              | 2004                      |       | 2005                     |  | 2005 
|                                 |  | Thousands of yen       |              | Thousands of U.S. dollars
|Net sales to external customers: |  |                        |              |                           |       |                          |  |       |              |  |   |          
|Japan                            |  | (Yen)                  | 20,052,478   |                           | (Yen) | 25,443,297               |  | (Yen) | 29,416,077   |  | $ | 249,289  
|North America                    |  |                        | 9,633,103    |                           |       | 11,891,452               |  |       | 15,416,991   |  |   | 130,652  
|Europe                           |  |                        | 12,138,158   |                           |       | 16,417,611               |  |       | 18,379,304   |  |   | 155,757  
|Asia Pacific                     |  |                        | 4,809,092    |                           |       | 6,304,675                |  |       | 7,909,753    |  |   | 67,032   
|Latin America                    |  |                        | 1,455,516    |                           |       | 1,992,219                |  |       | 1,907,776    |  |   | 16,167   
|Corporate                        |  |                        |             |                           |       |                         |  |       |             |  |   |         
|                                 |  |                        |              |                           |       |                          |  |       |              |  |   |          
|Consolidated Total               |  | (Yen)                  | 48,088,347   |                           | (Yen) | 62,049,254               |  | (Yen) | 73,029,901   |  | $ | 618,897  
|                                 |  |                        |              |                           |       |                          |  |       |              |  |   |          
|Operating income (loss)          |  |                        |              |                           |       |                          |  |       |              |  |   |          
|Japan                            |  | (Yen)                  | 12,740,687   |                           | (Yen) | 16,599,993               |  | (Yen) | 18,636,462   |  | $ | 157,936  
|North America                    |  |                        | 6,067,435    |                           |       | 7,543,325                |  |       | 10,483,801   |  |   | 88,846   
|Europe                           |  |                        | 5,606,304    |                           |       | 9,732,567                |  |       | 10,330,980   |  |   | 87,551   
|Asia Pacific                     |  |                        | 857,604      |                           |       | 1,678,826                |  |       | 2,836,044    |  |   | 24,034   
|Latin America                    |  |                        | 728,786      |                           |       | 1,282,044                |  |       | 1,092,793    |  |   | 9,261    
|Corporate                        |  |                        | (10,847,320) |                           |       | (10,759,079)             |  |       | (15,808,305) |  |   | (133,969)
|                                 |  |                        |              |                           |       |                          |  |       |              |  |   |          
|Consolidated Total               |  | (Yen)                  | 15,153,496   |                           | (Yen) | 26,077,676               |  | (Yen) | 27,571,775   |  | $ | 233,659  
|                                 |  |                        |              |                           |       |                          |  |       |              |  |   |          
|                                 |  |                        |             
|                                 |  |                        |              | December 31,              |       | December 31,            
|                                 |  |                        |              | 2004                      |       | 2005                     |  | 2005 
|                                 |  |                        |              | Thousands of yen          |       | Thousands ofU.S. dollars
|Total assets                     |  |                        |              |                           |       |                          |  |       |              |  |   |          
|Japan                            |  |                        |              |                           | (Yen) | 49,204,224               |  | (Yen) | 53,265,431   |  | $ | 451,402  
|North America                    |  |                        |              |                           |       | 14,596,978               |  |       | 19,963,528   |  |   | 169,183  
|Europe                           |  |                        |              |                           |       | 18,610,466               |  |       | 21,442,463   |  |   | 181,716  
|Asia Pacific                     |  |                        |              |                           |       | 6,757,197                |  |       | 10,042,603   |  |   | 85,107   
|Latin America                    |  |                        |              |                           |       | 2,433,549                |  |       | 4,094,305    |  |   | 34,697   
|Corporate                        |  |                        |              |                           |       | 15,131,497               |  |       | 24,126,894   |  |   | 204,465  
|                                 |  |                        |              |                           |       |                          |  |       |              |  |   |          
|Consolidated Total               |  |                        |              |                           | (Yen) | 106,733,911              |  | (Yen) | 132,935,224  |  | $ | 1,126,570
|                                 |  |                        |              |                           |       |                          |  |       |              |  |   |          



F-35



---

|                             |  |                        |            |                           |       |            |  |       |            |  |   |        
|---------------------------- |  | ---------------------- | ---------- | ------------------------- | ----- | ---------- |  | ----- | ---------- |  | - | -------
|                             |  | Year ended December 31 |            | Year endedDecember 31,   
|                             |  | 2003                   |            | 2004                      |       | 2005       |  | 2005 
|                             |  | Thousands of yen       |            | Thousands of U.S. dollars
|Sales by Product and Service |  |                        |            |                           |       |            |  |       |            |  |   |        
|Server based                 |  | (Yen)                  | 3,633,234  |                           | (Yen) | 3,310,419  |  | (Yen) | 3,278,568  |  | $ | 27,784 
|Personal Computer            |  |                        | 13,506,949 |                           |       | 16,889,881 |  |       | 19,714,453 |  |   | 167,072
|Internet based               |  |                        | 10,751,958 |                           |       | 16,647,154 |  |       | 18,373,789 |  |   | 155,710
|All Suite products           |  |                        | 9,914,290  |                           |       | 18,596,603 |  |       | 24,484,969 |  |   | 207,500
|PCS and Royalties            |  |                        | 9,214,786  |                           |       | 4,714,478  |  |       | 3,683,260  |  |   | 31,214 
|Other                        |  |                        | 1,067,130  |                           |       | 1,890,719  |  |       | 3,494,862  |  |   | 29,617 
|                             |  |                        |            |                           |       |            |  |       |            |  |   |        
|Consolidated Total           |  | (Yen)                  | 48,088,347 |                           | (Yen) | 62,049,254 |  | (Yen) | 73,029,901 |  | $ | 618,897
|                             |  |                        |            |                           |       |            |  |       |            |  |   |        



Significant
customer



SOFTBANK COMMERCE whose name changed into
SOFTBANK BB in January 2003, an indirect wholly-owned subsidiary of SOFTBANK accounted for more than 10% of net sales to external customers for the years ended December 31, 2003, 2004 and 2005. Net sales to SOFTBANK and its affiliates for the
years ended December 31, 2003, 2004 and 2005 were (Yen) 9,204,071 thousand, (Yen) 10,396,225 thousand and (Yen) 10,604,947 thousand ($89,872 thousand), respectively.



24. Subsequent events



On January 27th2006, a
settlement agreement for a suit of infringement of a patent was concluded. Based on a principal term of the agreement, the company will receive USD 15,000 thousands (equivalent of (Yen) 1,766,250 thousands).



On March 28, 2006, Trend Micro adopted at the seventeenth ordinary general meeting of
shareholders the following resolutions regarding Stock acquisition rights set forth in Article 280-20 and Article 280-21 of the Japanese Commercial Code to be issued in order to introduce the stock option plan.



Number of Stock acquisition rights:



The total number of Stock acquisition rights shall be limited to a maximum
of 6,000. (One Stock acquisition right represents the acquisition right of five hundred shares.)



Class of shares subject to the exercise of Stock acquisition rights:



Common shares of the Company



Issue price:



(Yen)0



Exercise period of Stock acquisition rights:



The exercise period of the Stock acquisition rights shall be from April 1, 2007 to March 31, 2012.



The person to be granted:



The directors, employees and staff seconded to, of the Company and its
affiliates



F-36



---

SCHEDULE II



TREND MICRO
INCORPORATED

AND CONSOLIDATED SUBSIDIARIES



VALUATION AND QUALIFYING ACCOUNTS



|                                |  |                              |         |                                       |       |                     |  |                |           |                         |       |        |  |       |        
|------------------------------- |  | ---------------------------- | ------- | ------------------------------------- | ----- | ------------------- |  | -------------- | --------- | ----------------------- | ----- | ------ |  | ----- | -------
|                                |  | Balance atbeginning ofperiod |         | Additionscharged to operatingexpenses |       | Deductions (Note 1) |  | Other (Note 2) |           | Balance at end ofperiod
|                                |  | Thousands of yen            
|                                |  |                              |         |                                       |      
|Year ended December 31, 2003:   |  |                              |         |                                       |       |                     |  |                |           |                         |       |        |  |       |        
|Allowance for doubtful accounts |  | (Yen)                        | 599,808 |                                       | (Yen) | 278,150             |  | (Yen)          | (301,299) |                         | (Yen) | 654    |  | (Yen) | 577,313
|                                |  |                              |         |                                       |       |                     |  |                |           |                         |       |        |  |       |        
|                                |  |                              |         |                                       |      
|Year ended December 31, 2004:   |  |                              |         |                                       |       |                     |  |                |           |                         |       |        |  |       |        
|Allowance for doubtful accounts |  | (Yen)                        | 577,313 |                                       | (Yen) | 8,138               |  | (Yen)          | (309,465) |                         | (Yen) | 16,829 |  | (Yen) | 292,815
|                                |  |                              |         |                                       |       |                     |  |                |           |                         |       |        |  |       |        
|                                |  |                              |         |                                       |      
|Year ended December 31, 2005:   |  |                              |         |                                       |       |                     |  |                |           |                         |       |        |  |       |        
|Allowance for doubtful accounts |  | (Yen)                        | 292,815 |                                       | (Yen) | 123,020             |  | (Yen)          | (154,918) |                         | (Yen) | 21,340 |  | (Yen) | 282,257
|                                |  |                              |         |                                       |       |                     |  |                |           |                         |       |        |  |       |        



|Notes: | 1.   Amounts written off.
|------ | -------------------------



| | 2. Translation adjustment.
| | --------------------------



F-37



---

|                              |  |                              |         |                           |       |                     |  |                |           |                         |       |         |  |       |        
|----------------------------- |  | ---------------------------- | ------- | ------------------------- | ----- | ------------------- |  | -------------- | --------- | ----------------------- | ----- | ------- |  | ----- | -------
|                              |  | Balance atbeginning ofperiod |         | Additionscharged to sales |       | Deductions (Note 1) |  | Other (Note 2) |           | Balance at end ofperiod
|                              |  | Thousands of yen            
|                              |  |                              |         |                           |      
|Year ended December 31, 2003: |  |                              |         |                           |       |                     |  |                |           |                         |       |         |  |       |        
|Allowance for sales returns   |  | (Yen)                        | 362,229 |                           | (Yen) | 91,678              |  | (Yen)          |          |                         | (Yen) | (7,486) |  | (Yen) | 446,421
|                              |  |                              |         |                           |       |                     |  |                |           |                         |       |         |  |       |        
|                              |  |                              |         |                           |      
|Year ended December 31, 2004: |  |                              |         |                           |       |                     |  |                |           |                         |       |         |  |       |        
|Allowance for sales returns   |  | (Yen)                        | 446,421 |                           | (Yen) | 132,528             |  | (Yen)          |          |                         | (Yen) | (6,826) |  | (Yen) | 572,123
|                              |  |                              |         |                           |       |                     |  |                |           |                         |       |         |  |       |        
|                              |  |                              |         |                           |      
|Year ended December 31, 2005: |  |                              |         |                           |       |                     |  |                |           |                         |       |         |  |       |        
|Allowance for sales returns   |  | (Yen)                        | 572,123 |                           | (Yen) | 89,062              |  | (Yen)          | (254,005) |                         | (Yen) | 15,273  |  | (Yen) | 422,453
|                              |  |                              |         |                           |       |                     |  |                |           |                         |       |         |  |       |        



|Notes: | 1. Amounts of actual sales returns.
|------ | -----------------------------------



| | 2. Translation adjustment.
| | --------------------------



F-38



---

|                                         |  |                              |         |           |       |            |  |       |           |                          |       |   |  |       |        
|---------------------------------------- |  | ---------------------------- | ------- | --------- | ----- | ---------- |  | ----- | --------- | ------------------------ | ----- | - |  | ----- | -------
|                                         |  | Balance atbeginning ofperiod |         | Additions |       | Deductions |  | Other |           | Balance at end of period
|                                         |  | Thousands of yen            
|                                         |  |                              |         |           |      
|Year ended December 31, 2003:            |  |                              |         |           |       |            |  |       |           |                          |       |   |  |       |        
|                                         |  |                              |         |           |      
|Valuation allowance Deferred tax assets |  | (Yen)                        | 190,079 |           | (Yen) | 29,009     |  | (Yen) | (60,246)  |                          | (Yen) |  |  | (Yen) | 158,842
|                                         |  |                              |         |           |       |            |  |       |           |                          |       |   |  |       |        
|                                         |  |                              |         |           |      
|Year ended December 31, 2004:            |  |                              |         |           |       |            |  |       |           |                          |       |   |  |       |        
|                                         |  |                              |         |           |      
|Valuation allowance Deferred tax assets |  | (Yen)                        | 158,842 |           | (Yen) | 97,019     |  | (Yen) | (74,404)  |                          | (Yen) |  |  | (Yen) | 181,457
|                                         |  |                              |         |           |       |            |  |       |           |                          |       |   |  |       |        
|                                         |  |                              |         |           |      
|Year ended December 31, 2005:            |  |                              |         |           |       |            |  |       |           |                          |       |   |  |       |        
|                                         |  |                              |         |           |      
|Valuation allowance Deferred tax assets |  | (Yen)                        | 181,457 |           | (Yen) |           |  | (Yen) | (160,627) |                          | (Yen) |  |  | (Yen) | 20,830 
|                                         |  |                              |         |           |       |            |  |       |           |                          |       |   |  |       |        



F-39



---

SIGNATURE



Pursuant to the requirements of Section 12 of the Securities Exchange Act of 1934, the registrant certifies that it meets all of the requirements for filing on
Form 20-F and has duly caused this annual report to be signed on its behalf by the undersigned, thereunto duly authorized.



|                         |  |                                                                              
|------------------------ |  | -----------------------------------------------------------------------------
|TREND MICRO INCORPORATED
|                         | 
|By:                      |  | Mahendra Negi                                                                
|Name:                    |  | Representative Director                                                      
|Title:                   |  | Chief Operating Officer, Chief Financial Officer and Executive Vice President
|Date: June 30, 2006     



1



---

INDEX OF EXHIBITS



|               |        |  |                                                                                                                                                                                                                
|-------------- | ------ |  | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|Exhibit Number |        |  | Document                                                                                                                                                                                                       
|               |       
|1.1            |        |  | Articles of Incorporation of Trend Micro (English translation)                                                                                                                                                 
|               |       
|1.2            |        |  | Share Handling Regulations of Trend Micro, as amended (English translation)                                                                                                                                    
|               |       
|1.3            |        |  | Regulations of the Board of Directors of Trend Micro, as amended (English translation)                                                                                                                         
|               |       
|1.4            |        |  | Regulations of the Board of Corporate Auditors of Trend Micro, as amended (English translation)                                                                                                                
|               |       
|2.1            | ***    |  | Specimen Common Stock Certificates                                                                                                                                                                             
|               |       
|2.2            | ****   |  | Form of Deposit Agreement among Trend Micro, The Bank of New York as depositary and all owners and holders from time to time of American Depositary Receipts, including the form of American
Depositary Receipt
|               |       
|4.1            | *****+ |  | Basic Agreement on Continual Sale and Purchase of Goods dated October 1, 1999, between Trend Micro Incorporated and SOFTBANK BB (formerly known as SOFTBANK COMMERCE CORP.), and related
agreements            
|               |       
|4.2            | *      |  | Limited Liability Agreement dated April 21, 2005, between Trend Micro Incorporated and Hirotaka Takeuchi                                                                                                       
|               |       
|8.1            |        |  | List of subsidiaries of Trend Micro                                                                                                                                                                            
|               |       
|11.1           | **     |  | Code of Conduct                                                                                                                                                                                                
|               |       
|12.1           |        |  | Certification of the principal executive officer of Trend Micro required by Rule 13a-14(a)                                                                                                                     
|               |       
|12.2           |        |  | Certification of the principal financial officer of Trend Micro required by Rule 13a-14(a)                                                                                                                     
|               |       
|13.1           |        |  | Certification of the chief executive officer required by Rule 13a-14(b) and Section 1350 of Chapter 63 of Title 18 of the United States Code                                                                   
|               |       
|13.2           |        |  | Certification of the chief financial officer required by Rule 13a-14(b) and Section 1350 of Chapter 63 of Title 18 of the United States Code                                                                   
|               |       
|15.1           |        |  | Consent of Independent Registered Public Accounting Firm                                                                                                                                                       

---

|* | Incorporated by reference to the corresponding exhibit to our annual report of Form 20-F (File No. 333-10486) filed on June 30, 2005.
|- | -------------------------------------------------------------------------------------------------------------------------------------

|** | Incorporated by reference to the corresponding exhibit to our annual report of Form 20-F (File No. 333-10486) filed on June 1, 2004.
|-- | ------------------------------------------------------------------------------------------------------------------------------------

|*** | Incorporated by reference to the corresponding exhibit to our annual report on Form 20-F (File No. 333-10486) filed on June 29, 2001.
|--- | -------------------------------------------------------------------------------------------------------------------------------------

|**** | Incorporated by reference to the corresponding exhibit to our Amendment No. 1 to Registration Statement on Form F-6 (File No. 333-10492) filed on June 22, 2001.
|---- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------

|***** | Incorporated by reference to the corresponding exhibit to our Amendment No. 2 to the Form F-1 Registration Statement (File No. 333-10568) filed on May 22, 2000.
|----- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------

|+ | Confidential treatment granted for a portion of these documents.
|- | ----------------------------------------------------------------