Note: This document has been translated from the Japanese original for reference purposes only. In the event of any
discrepancy between this translated document and the Japanese original, the original shall prevail.

March 29, 2024

Non-consolidated Financial Results
for the Nine Months Ended February 29, 2024
(Under Japanese GAAP)
Company name:
MIMASU SEMICONDUCTOR INDUSTRY CO., LTD.
Listing:
Tokyo Stock Exchange
Securities code:
8155
URL:
https://www.mimasu.co.jp/
Representative:
Tatsuro Yako, Representative Director and President
Inquiries:
Takayuki Nakajima, General Manager of Management Headquarters
Telephone:+81-27-372-2021
Scheduled date to file quarterly securities report:
April 12, 2024–
Scheduled date to commence dividend payment:
Preparation of supplementary material on quarterly financial results: None
Holding of quarterly financial results briefing:
None(Millions of yen with fractional amounts rounded down, unless otherwise noted)

1. Non-consolidated financial results for the nine months ended February 29, 2024 (from June 1,
2023 to February 29, 2024)(1) Non-consolidated operating results (cumulative)
Net sales
Nine months endedFebruary 29, 2024
February 28, 2023

Operating profit

Millions of yen% Millions of yen

66,59869,199(3.8)
27.0

Basic earnings
per share
Nine months ended
February 29, 2024
February 28, 2023

(Percentages indicate year-on-year changes.)
Ordinary profit% Millions of yen

9,054
9,812

(7.7)
49.4

9,057
9,721

Profit% Millions of yen(6.8)
47.4

Diluted earnings
per share
Yen

Yen

197.58209.54––(2) Non-consolidated financial position
Total assets
As ofFebruary 29, 2024
May 31, 2023
Reference:Net assets

Equity-to-asset ratio

Millions of yen

Millions of yen%

118,416
124,33980,75476,39668.2
61.4

EquityAs of February 29, 2024:
As of May 31, 2023:¥80,754 million¥76,396 million

6,347
6,731%(5.7)
49.0

2. Cash dividends
Annual dividends per shareFirst quarter-end Second quarter-end Third quarter-end
Yen
Fiscal year ended
May 31, 2023
Fiscal year ending
May 31, 2024

Yen

Fiscal year-end

Yen–

32.00

––

32.00

–

Fiscal year ending
May 31, 2024
(Forecast)

TotalYen

Yen

32.00

64.00

32.00

64.00

Note: Revisions to the forecast of cash dividends most recently announced: None

3. Non-consolidated earnings forecasts for the fiscal year ending May 31, 2024 (from June 1, 2023 toMay 31, 2024)
Net sales
Millions of yen

Fiscal year ending
May 31, 2024

86,000(Percentages indicate year-on-year changes.)
Basic
Ordinary profit
Profitearnings
per share

Operating profit% Millions of yen(5.4)

10,300% Millions of yen(7.8)

10,150% Millions of yen(7.7)

7,030%Yen(7.7)

218.84

Note: Revisions to the earnings forecasts most recently announced: None

* Notes(1) Adoption of accounting treatment specific to the preparation of quarterly non-consolidated financial
statements: None
(2) Changes in accounting policies, changes in accounting estimates, and restatement(i) Changes in accounting policies due to revisions to accounting standards and other regulations:None(ii) Changes in accounting policies due to other reasons: None(iii) Changes in accounting estimates: None(iv) Restatement: None
(3) Number of issued shares (common shares)(i) Total number of issued shares at the end of the period (including treasury shares)
As of February 29, 2024

35,497,183 shares

As of May 31, 2023

35,497,183 shares(ii) Number of treasury shares at the end of the period
As of February 29, 2024

3,373,302 shares

As of May 31, 2023

3,373,211 shares(iii) Average number of shares outstanding during the period
Nine Months ended February 29, 2024

32,123,945 shares

Nine Months ended February 28, 2023

32,124,373 shares* Quarterly financial results reports are exempt from quarterly review conducted by certified public
accountants or an audit corporation.
* Proper use of earnings forecasts, and other special matters
Forward-looking statements, including the earnings forecasts stated in these materials, are based on
information currently available to the Company and assumptions deemed reasonable. Actual businessand other results may differ materially from the earnings forecasts due to various factors. For thesuppositions that form the assumptions for earnings forecasts and cautions concerning the use ofearnings forecasts, please refer to “(3) Explanation of earnings forecasts and other forward-looking
statements” of “1. Qualitative information regarding financial results for the nine months ended February
29, 2024” on page 3 of the attached materials.

MIMASU SEMICONDUCTOR INDUSTRY CO., LTD. (8155)

Attached Materials
Index
1. Qualitative information regarding financial results for the nine months ended February 29, 2024 ......... 2(1) Explanation of operating results ......................................................................................................... 2(2) Explanation of financial position........................................................................................................ 3(3) Explanation of earnings forecasts and other forward-looking statements .......................................... 3
2. Quarterly non-consolidated financial statements and significant notes thereto ........................................ 4(1) Quarterly non-consolidated balance sheet .......................................................................................... 4(2) Quarterly non-consolidated statement of income ............................................................................... 6(3) Notes to quarterly non-consolidated financial statements .................................................................. 7Notes on premise of going concern .................................................................................................... 7Notes when there are significant changes in amounts of equity ......................................................... 7Segment information .......................................................................................................................... 7-1-MIMASU SEMICONDUCTOR INDUSTRY CO., LTD. (8155)

1. Qualitative information regarding financial results for the nine months ended
February 29, 2024
(1) Explanation of operating results
During the nine months ended February 29, 2024, the Japanese economy continued to follow a trend ofmoderate recovery overall due to factors that include improvements in capital investments and personal
consumption despite the impact of the worldwide surge in resource prices, a downswing in the global
economy and other factors.
Production of semiconductor silicon wafers was continuously affected by inventory adjustments in thedevice market. However capital investments among semiconductor-related companies, the primaryusers of the products of MIMASU SEMICONDUCTOR INDUSTRY CO., LTD. (the “Company”),were firm.
Amid such business environment, the Company engaged in concerted efforts to improve its operating
results, which entailed striking a balance between promoting its cutting-edge processing technologies
and lowering costs, while also actively proceeding to promote sales of products developed in-house.
As a result, net sales for the nine months ended February 29, 2024 decreased by 3.8% year on year to¥66,598 million, operating profit was ¥9,054 million (down 7.7% year on year), ordinary profit was¥9,057 million (down 6.8%), and profit was ¥6,347 million (down 5.7%).
Operating results by segment are as follows. Note that the amounts of net sales and profit include theamounts related to intersegment transactions.
Semiconductor Division
The division was affected by inventory adjustments in the device market.
As a result, net sales in this division amounted to ¥35,262 million (down 14.9% year on year), andsegment profit (operating profit) was ¥6,984 million (down 9.0%).
Industrial Sales Division
In this division, we actively engaged in sales promotions of products developed in-house as well asother products handled by the division.
As a result, sales of other products handled by the division increased, net sales in this division
amounted to ¥32,641 million (up 15.6% year on year), and segment profit (operating profit) was ¥1,806
million (up 6.8%).
Engineering DivisionThis division specifically assumes the role of development and as such has been actively developing inhouse products and selling them through the Industrial Sales Division.
In addition, the division has been actively engaged in developing, designing and manufacturing devices
for use in the Semiconductor Division.
As a result, net sales in this division amounted to ¥4,007 million (down 29.8% year on year), andsegment profit (operating profit) was ¥561 million (down 25.5%).

-2-

MIMASU SEMICONDUCTOR INDUSTRY CO., LTD. (8155)(2) Explanation of financial position
Total assets as of February 29, 2024 were ¥118,416 million, down ¥5,923 million from the end of theprevious fiscal year, mainly reflecting a decrease in trade receivables. Total liabilities were ¥37,662
million, down ¥10,280 million, mainly reflecting a decrease in trade payables. Total net assets were¥80,754 million, mainly reflecting an increase of ¥4,291 million in retained earnings.
(3) Explanation of earnings forecasts and other forward-looking statements
The earnings forecasts have not been changed from those announced on September 29, 2023.

-3-

MIMASU SEMICONDUCTOR INDUSTRY CO., LTD. (8155)

2. Quarterly non-consolidated financial statements and significant notes thereto(1) Quarterly non-consolidated balance sheet(Millions of yen)
As of May 31, 2023
AssetsCurrent assets
Cash and deposits
Notes and accounts receivable - trade
Merchandise and finished goods
Work in process
Raw materials and supplies
Other
Allowance for doubtful accounts
Total current assets
Non-current assets
Property, plant and equipment
Buildings, net
Machinery and equipment, net
Construction in progress
Other, net
Total property, plant and equipment
Intangible assets
Investments and other assets
Total non-current assets
Total assets
Liabilities
Current liabilities
Notes and accounts payable - trade
Income taxes payable
Provisions
Other
Total current liabilities
Non-current liabilities
Provision for retirement benefits
Other
Total non-current liabilities
Total liabilities-4-

As of February 29, 2024

27,24040,063
4,692
1,370
4,347
3,349
(4)
81,05921,22333,855
3,410
1,218
4,944
965
(3)
65,61421,502
8,461
3,298
4,521
37,783809
4,687
43,280124,339

20,375
8,721
13,743
5,333
48,173807
3,821
52,802
118,416

30,9193,172
110
13,53347,73528,742–528
7,793
37,06341
166
207
47,943–598
598
37,662MIMASU SEMICONDUCTOR INDUSTRY CO., LTD. (8155)(Millions of yen)
As of May 31, 2023
Net assets
Shareholders’ equity
Share capital
Capital surplus
Retained earnings
Treasury shares
Total shareholders’ equity
Valuation and translation adjustments
Valuation difference on available-for-sale securities
Deferred gains or losses on hedges
Total valuation and translation adjustments
Total net assets
Total liabilities and net assets-5-

As of February 29, 202418,824
18,77843,466(4,772)
76,295

18,824
18,77847,757(4,772)80,586

140
(39)
100
76,396124,339

203
(36)
167
80,754
118,416MIMASU SEMICONDUCTOR INDUSTRY CO., LTD. (8155)(2) Quarterly non-consolidated statement of income(Millions of yen)
Nine months ended
February 28, 2023
Net sales
Cost of sales
Gross profit
Selling, general and administrative expenses
Operating profit
Non-operating income
Interest income
Dividend income
Surrender value of insurance policies
OtherTotal non-operating income
Non-operating expenses
Interest expensesLoss on sale and retirement of non-current assets
OtherTotal non-operating expenses
Ordinary profit
Extraordinary income
Subsidy income
OtherTotal extraordinary income
Extraordinary losses
Loss on sale of investment securities
Total extraordinary losses
Profit before income taxes
Income taxes - current
Income taxes - deferred
Total income taxes
Profit-6-

Nine months ended
February 29, 2024

69,19952,346
16,853
7,040
9,812

66,59853,83812,760
3,705
9,054

112–
64
77

0
15
32
54
102

0
168
0168
9,721

593
0
99
9,057

–
––10018118

–
–
9,721
3,947(956)
2,990
6,731

229,173
1,884
942
2,826
6,347

MIMASU SEMICONDUCTOR INDUSTRY CO., LTD. (8155)(3) Notes to quarterly non-consolidated financial statements
Notes on premise of going concern
Not applicable.
Notes when there are significant changes in amounts of equity
Not applicable.
Segment information
Information on the amounts of net sales and profit or loss for each reportable segment
Nine months ended February 28, 2023
Reportable segments
Semiconductor
Industrial
Division
Sales Division
Net sales
Sales from externalcustomers
Intersegment sales ortransfers

Engineering
Division

Total(Millions of yen)Amounts inthe quarterly
nonAdjustments
consolidated
statement ofincome

41,41927,779–69,199–69,199

2

454

5,707

6,165

(6,165)–

Total

41,422

28,234

5,707

75,364(6,165)69,199Segment profit

7,671

1,691

753

10,117

(304)

9,812

Notes: 1. The figure of “Adjustments” in “Segment profit” is the amount related to intersegment transactions.
2. Segment profit is adjusted with operating profit in the quarterly non-consolidated statement of income.
3. Because the Engineering Division specifically assumes the role of development and its sales are conducted
through the Industrial Sales Division, it does not generate “Sales from external customers.”

Nine months ended February 29, 2024
Reportable segments
Semiconductor
Industrial
Division
Sales Division
Net sales
Sales from externalcustomers
Intersegment sales ortransfers

Engineering
Division

Total(Millions of yen)Amounts inthe quarterly
nonAdjustments
consolidated
statement ofincome

35,261

31,337–

66,598–66,598

0

1,303

4,007

5,312

(5,312)–

Total

35,26232,641

4,007

71,911(5,312)

66,598Segment profit

6,984

1,806

561

9,352(297)9,054

Notes: 1. The figure of “Adjustments” in “Segment profit” is the amount related to intersegment transactions.
2. Segment profit is adjusted with operating profit in the quarterly non-consolidated statement of income.
3. Because the Engineering Division specifically assumes the role of development and its sales are conducted
through the Industrial Sales Division, it does not generate “Sales from external customers.”-7-