Notice Regarding Repurchase of the Company's Own Shares

‌To whom it may concern

May 15, 2026

Company name: Nissan Chemical Corporation Representative: YAGI Shinsuke, President (Code number: 4021, TSE Prime Market)

This is to notify that the company, at the Board of Directors' meeting, has decided to repurchase its shares in the market under Article 156 of the Companies Act, as applied pursuant to Article 165, Paragraph 3 of the same Act, on May 15, 2026.

1. Purpose of repurchase

   To facilitate flexible implementation of capital policy in response to changes in the business environment.

2. Details of repurchase

   1. Class of shares: Common shares of the company

   2. Total number of shares: Up to 2,100,000 shares

      (1.56% of total shares outstanding, excluding treasury shares)

   3. Total amount: Up to 10,500,000,000 yen

   4. Period of repurchase: From May 18, 2026 to March 31, 2027

(For reference)

Number of treasury shares as of May 15, 2026

-Total number of shares issued (excluding treasury shares): 134,240,748 shares

-Number of treasury shares: 559,252 shares

* Not including 127,000 shares of treasury shares which the Board Benefit Trust (BBT) has hold.