Financial Results (First Quarter of FY2026)

Member of the Financial Accounting Standards Foundation

May 11, 2026

Company name: Toyo Tanso Co., Ltd. Listing: Tokyo Stock Exchange Securities code: 5310

URL: https://www.toyotanso.co.jp

Representative: Naotaka Kondo, Representative Director, Chairman & President, CEO Inquiries: Masaki Kuno, General Manager, Finance and Accounting Department, General

Administration Division

Telephone: +81-50-3097-4950

Scheduled date to commence dividend payments: -Preparation of supplementary material on financial results: Yes Holding of financial results briefing: None

1. Consolidated financial results for the three months ended March 31, 2026 (From January 1, 2026 to March 31, 2026) (1) Consolidated operating results (cumulative total) (Millions of yen, rounded down)

   (Percentages indicate changes from the same period in the previous fiscal year.)

   Net sales Operating profit Ordinary profit Profit attributable to

   owners of parent

   		%	%	%	%
   Three months ended March 31, 2026	10,576	(7.8)	634 (70.3)	820 (56.5)	609 (52.3)
   Three months ended March 31, 2025	11,475	(8.7)	2,140 (15.9)	1,885 (38.0)	1,276 (46.4)

   Notes: 1. Comprehensive income Three months ended March 31, 2026 1,352 million yen [ -%]

   Three months ended March 31, 2025 33 million yen [-99.0%]

2. The rate of change in comprehensive income for the three months ended March 31, 2026, exceeded 1,000%, and is therefore shown as "-."

Three months ended March 31, 2026

Three months ended March 31, 2025

Basic earnings per share Diluted earnings per share

yen yen

29.05 -

60.88 -

(Millions of yen, rounded down)

Total assets Net assets Equity-to-asset ratio

%

As of March 31, 2026 119,147 95,863 80.4

As of December 31, 2025 117,916 97,551 82.7

Reference: Equity As of March 31, 2026 95,802 million yen

As of December 31, 2025 97,491 million yen

1. Cash dividends

   Year ended December 31, 2025

   Annual dividends per share (yen)

   First quarter-end Second quarter-end Third quarter-end Fiscal year-end Total

   - 0.00 - 145.00 145.00

   Year ending December 31, 2026 (Actual)	-
   Year ending December 31, 2026 (Forecast)		0.00	-	145.00	145.00

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

2. Consolidated results forecast for the fiscal year ending December 31, 2026

(Millions of yen, rounded down) (Percentages indicate year-on-year changes.)

Fiscal year ending December 31, 2026

49,000 6.1 6,200 (8.3) 6,000 (25.8) 5,000 (8.5) 238.41

(Note) Revisions of consolidated forecasts most recently announced: None

• Notes

  1. Significant changes in the scope of consolidation during the period: None Newly included: (Company name)

     Excluded: (Company name)

  2. Adoption of accounting treatment specific to the preparation of quarterly consolidated financial statements: Yes

     Note: For details, please refer to "Notes on specific accounting methods for the preparation of quarterly consolidated financial statements" on page 8 of the Attached Documents.

  3. Changes in accounting policies and accounting estimates and restatements

     1. Changes in accounting policies due to revisions to accounting standards and other regulations: None

     2. Changes in accounting policies due to other reasons: None

     3. Changes in accounting estimates: None

     4. Restatement: None

  4. Number of issued shares (common shares)

     1. Total number of issued shares at the end of the period (including treasury shares) As of March 31, 2026 20,992,588 shares

        As of December 31, 2025 20,992,588 shares

     2. Number of treasury shares at the end of period

        As of March 31, 2026 20,372 shares

        As of December 31, 2025 20,372 shares

     3. Average number of shares outstanding during the period (cumulative from the beginning of the fiscal year)

        Three months ended March 31, 2026 20,972,216 shares

        Three months ended March 31, 2025 20,972,311 shares

• Review of the Japanese-language originals of the attached consolidated quarterly financial statements by certified public accountants or an audit firm: None
• Proper use of earnings forecasts, and other special matters

(Cautions regarding forward-looking statements)

Forward-looking statements such as the earnings forecasts in this material are based on currently available information and certain assumptions deemed rational, and are not intended as a guarantee that these forecasts will be achieved. Accordingly, actual results may differ significantly from these forecasts due to various factors. For more information on the preconditions of the forecasts and on precautionary notes concerning the usage of these forecasts, please refer to "Explanation of information regarding consolidated earnings forecasts and other projections" on page 3 of the Attached Documents.

• Attached Documents

1. Overview of the Business Results 2

   1. Overview of the quarterly business results 2

   2. Overview of the quarterly financial position 3
   3. Explanation of information regarding consolidated earnings forecasts and other projections 3
2. Quarterly Consolidated Financial Statements and Notes 4
   1. Quarterly consolidated balance sheets 4
   2. Quarterly consolidated statement of income and quarterly consolidated statement of comprehensive income 6 (Quarterly consolidated statements of income) 6 (Quarterly consolidated statement of comprehensive income) 7
   3. Notes on quarterly consolidated financial statements 8 (Notes on specific accounting methods for the preparation of quarterly consolidated financial statements) 8 (Notes on segment information, etc.) 8 (Notes if the amount of shareholders' equity has changed significantly) 9 (Notes regarding the premise of a going concern) 9 (Notes to the quarterly statement of cash flows) 9
3. Supplementary Information 10
   1. Orders and sales by product category 10
   2. Overview 11

1

During the first three months of the consolidated fiscal year under review, the global economy showed underlying resilience. However, uncertainty persisted against the backdrop of rising energy prices driven by escalating tensions in the Middle East, in addition to concerns over U.S. policy developments and economic stagnation in China.

In the business environment surrounding the Group, in electronics applications, demand remained strong for some applications such as cutting-edge products for generative AI. However, applications for silicon semiconductors and SiC semiconductors remained sluggish, as wafer inventory adjustments continued. Mobility and general industries applications performed solidly, against the backdrop of steady operations in the automotive industry and firm corporate capital investment.

In this environment, the Group worked to achieve medium-to-long-term business growth and enhance corporate value through the creation of added value. The Group responded to changes in the external environment by controlling the balance of its product and application mix through the development of new applications and the deepening of existing ones. It also addressed customer needs sincerely and provided high-value-added, innovative solutions through forward-looking product and technology development.

As a result, in the first three months of the consolidated fiscal year under review, net sales were 10,576 million yen (down 7.8% year on year). In terms of profits, operating profit was 634 million yen (down 70.3% year on year), ordinary profit was 820 million yen (down 56.5% year on year), and profit attributable to owners of parent was 609 million yen (down 52.3% year on year).

The overall performance of each business segment was as follows. (Please refer to "3. Supplementary Information" for an overview of each product category.)

Japan

Sales of products for metallurgical applications including those for industrial furnaces and EDM electrodes performed steadily, but sales of semiconductor applications declined substantially due to the impact of market adjustments. As a result, in Japan, net sales were 5,511 million yen (down 12.3% year on year), and operating profit was 782 million yen (down 51.1% year on year).

United States

Sales of products for metallurgical applications including those for continuous casting were weak, but semiconductor applications and others held up firmly. As a result, in the United States, net sales were 1,039 million yen (up 1.1% year on year), and operating profit was 19 million yen (down 74.9% year on year).

Europe

While sales of metallurgical applications such as EDM electrodes and small carbon brushes for home appliances performed steadily, sales of semiconductor applications declined. As a result, in Europe, net sales were 1,283 million yen (down 0.9% year on year). Operating profit was 12 million yen (down 71.1% year on year).

Asia

Sales of metallurgical applications such as industrial furnaces increased, but sales of carbon brush products were weak. As a result, in Asia, net sales were 2,741 million yen (down 4.5% year on year) and operating loss was 10 million yen (44 million yen of operating profit in the same period of the previous fiscal year).

2