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.

September 29, 2023

Non-consolidated Financial Results
for the Three Months Ended August 31, 2023
(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:
October 13, 2023
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 three months ended August 31, 2023 (from June 1, 2023
to August 31, 2023)(1) Non-consolidated operating results (cumulative)
Net sales
Three months ended
August 31, 2023
August 31, 2022

Operating profit

Millions of yen% Millions of yen

20,25920,1040.8
17.8

Basic earnings
per share
Three months ended
August 31, 2023
August 31, 2022

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

3,002
3,203

(6.3)
75.7

3,071
3,219

Profit% Millions of yen(4.6)
74.6

Diluted earnings
per share
Yen

Yen

66.51
69.52

––(2) Non-consolidated financial position
Total assets
As ofAugust 31, 2023
May 31, 2023
Reference:

Net assets

Equity-to-asset ratio

Millions of yen

Millions of yen%

116,915
124,339

77,51376,39666.3
61.4

EquityAs of August 31, 2023:
As of May 31, 2023:¥77,513 million¥76,396 million

2,136
2,233%(4.3)
74.4

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

Total

Yen

Yen

32.00

–

32.00

64.00

32.00

–

32.00

64.00

–

Fiscal year ending
May 31, 2024
(Forecast)

Note: Revisions to the forecast of cash dividends most recently announced: Yes

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)

10,150Note: Revisions to the earnings forecasts most recently announced: Yes% Millions of yen(7.7)

7,030%Yen(7.7)

218.84

* Notes(1) Adoption of accounting treatment specific to the preparation of quarterly non-consolidated financialstatements: 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 August 31, 2023

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 August 31, 2023

3,373,230 shares

As of May 31, 2023

3,373,211 shares(iii) Average number of shares outstanding during the period
Three months ended August 31, 2023

32,123,953 shares

Three months ended August 31, 2022

32,124,574 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 thesuppositions 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 three months ended August31, 2023” on page 3 of the attached materials.

MIMASU SEMICONDUCTOR INDUSTRY CO., LTD. (8155)

Attached Materials
Index
1. Qualitative information regarding financial results for the three months ended August 31, 2023 ........... 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 three months ended
August 31, 2023
(1) Explanation of operating results
During the three months ended August 31, 2023, the Japanese economy followed a trend of moderate
recovery due to factors that include improvements in capital investments and personal consumption
despite the impact of the worldwide surge in resource prices and other factors.
Production of semiconductor silicon wafers was continuously affected by inventory adjustments in thedevice market. On the other hand, capital investments among semiconductor-related companies, theprimary users 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 operatingresults, 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 three months ended August 31, 2023 increased by 0.8% year on year to¥20,259 million, while operating profit was ¥3,002 million (down 6.3% year on year), ordinary profit
was ¥3,071 million (down 4.6%), and profit was ¥2,136 million (down 4.3%).
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 ¥11,812 million (down 13.8% year on year), andsegment profit (operating profit) was ¥2,475 million (down 10.1%).
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 products developed in-house and other products handled by the division increased,
net sales in this division amounted to ¥8,789 million (up 35.9% year on year), and segment profit(operating profit) was ¥457 million (up 16.7%).
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 ¥1,330 million (up 35.6% year on year), and segment
profit (operating profit) was ¥199 million (up 38.7%).

-2-

MIMASU SEMICONDUCTOR INDUSTRY CO., LTD. (8155)(2) Explanation of financial position
Total assets as of August 31, 2023 were ¥116,915 million, down ¥7,424 million from the end of theprevious fiscal year, mainly reflecting a decrease in cash and deposits. Total liabilities were ¥39,402
million, down ¥8,540 million, mainly reflecting a decrease in trade payables. Total net assets were¥77,513 million, mainly reflecting an increase of ¥1,108 million in retained earnings.
(3) Explanation of earnings forecasts and other forward-looking statements
The future outlook is likely to remain uncertain due to the impact of inventory adjustments in thesemiconductor device market and other factors.
Under such circumstances, the Company will continue striving to improve its operating results byactively proceeding to promote sales particularly of in-house products, while endeavoring to enhance
its competitive strengths by establishing fabrication processes featuring greater precision andsubstantial productivity.
The previously pending earnings and cash dividend forecasts for the fiscal year ending May 31, 2024,
have been disclosed today. With respect to the full-year operating results, we forecast net sales of ¥86.0billion, operating profit of ¥10.3 billion, ordinary profit of ¥10.15 billion, and profit of ¥7.03 billion.
In addition, the Company intends to pay annual dividends of ¥64 per share, which is the same amountas in the previous fiscal year, consisting of an interim dividend and a year-end dividend each amounting
to ¥32 per share.

-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
OtherAllowance 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 August 31, 2023

27,24040,063
4,692
1,370
4,347
3,349
(4)
81,05914,984
37,128
3,617
1,350
4,959
1,525
(3)
63,56221,502
8,461
3,298
4,521
37,783809
4,687
43,280124,339

21,0837,940
14,308
4,966
48,299845
4,207
53,353116,915

30,9193,172
110
13,53347,73526,274603
491
11,41338,78241
166
207
47,9436613
619
39,402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 August 31, 2023

18,824
18,77843,466(4,772)
76,295

18,824
18,77844,574(4,772)
77,404

140
(39)
100
76,396124,339

170
(61)
108
77,513116,915MIMASU SEMICONDUCTOR INDUSTRY CO., LTD. (8155)(2) Quarterly non-consolidated statement of income(Millions of yen)Three months ended
August 31, 2022
Net sales
Cost of sales
Gross profit
Selling, general and administrative expenses
Operating profit
Non-operating income
Interest income
Dividend income
Foreign exchange gains
Surrender value of insurance policies
Other
Total non-operating income
Non-operating expenses
Loss on sale and retirement of non-current assets
Other
Total non-operating expenses
Ordinary profit
Extraordinary income
Gain on sale of investment securities
Total 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-

Three months ended
August 31, 2023

20,10415,007
5,096
1,892
3,203

20,25915,906
4,353
1,350
3,002

0
739
–
654

0
919
32
18
80

38
0
38
3,219

110
11
3,071

–
–

1818–
–
3,219
1,123
(137)
985
2,233

2
2
3,087
521
429
950
2,136

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
Three months ended August 31, 2022
Reportable segments(Millions of yen)Amounts inthe quarterly
nonAdjustments
consolidated
statement ofincome

Industrial
Sales
Division

Engineering
Division

13,695

6,409–

20,104–

20,104157

981

1,040(1,040)

–

Total

13,696

6,466

981

21,144(1,040)20,104

Segment profit

2,752

392

143

3,288(85)3,203

Semiconductor
Division
Net sales
Sales from externalcustomers
Intersegment sales ortransfersTotal

Notes: 1. The figure of “Adjustments” in “Segment profit” indicates the elimination of 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.”

Three months ended August 31, 2023
Reportable segments(Millions of yen)Amounts inthe quarterly
nonAdjustments
consolidated
statement ofincome

IndustrialSalesDivisionEngineeringDivision11,812

8,447–

20,259–20,259

0341

1,330

1,672

(1,672)–

Total

11,812

8,789

1,330

21,932(1,672)

20,259Segment profit

2,475

457

199

3,133(130)3,002

Semiconductor
DivisionNet sales
Sales from externalcustomers
Intersegment sales ortransfers

TotalNotes: 1. The figure of “Adjustments” in “Segment profit” indicates the elimination of 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-