Notice Regarding Purchase of Treasury Shares and Cancellation of Treasury Shares

(Acquisition of treasury shares pursuant to the provisions of the Articles of Incorporation based on the provisions of Article 165, Item 2 of the Corporate Law and cancellation of treasury shares in accordance with Article 178 of the Corporate Law)

KISSEI PHARMACEUTICAL CO., LTD. (the "Company") announces that it has decided at the meeting of its board of directors held on May 8, 2023 to purchase treasury shares pursuant to the provisions of Article 156 of the Corporate Law after applying the provisions of Article 165, Item 3 of the Law and to cancel the treasury shares, under the provisions of Article 178 of the Corporate Law.

1.　Reasons for the acquisition and cancellation of treasury shares

To execute a flexible capital policy in response to changes in the business environment, while improving capital efficiency and enhancing shareholder returns.

2.　Details of the acquisition

1) Type of shares to be acquired: Common shares of the Company
2) Total number of shares to be acquired: Up to 2,000,000 shares

(Percentage of total number of issued shares (excluding treasury shares) :4.34%)

3) Total acquisition cost: 6 billion yen (maximum)
4) Acquisition period: From May 10, 2023 to March 29, 2024
5) Acquisition method: Market purchases on the Tokyo Stock Exchange

1.Purchases through the Tokyo Stock Exchange Trading Network Off-Auction Own Share Repurchase Trading System (ToSTNeT-3)
2.Market purchases based on a discretionary trading contract regarding acquisition of own shares

(Note) The timing and method of the Off-Auction Own Share Repurchase Trading (ToSTNeT-3) will be announced as soon as they are determined.

3.　Details of the cancellation

1) Type of shares to be retired: Common shares of the Company
2) Number of shares to be cancelled: 2,500,000 shares

(4.83% of issued shares before the cancellation)

3) Total number of shares issued after the cancellation: 49,311,185 shares
4) Scheduled date of cancellation: June 12, 2023

(Reference) Number of Treasury shares as of March 31, 2023
Total number of issued shares (excluding treasury shares): 46,115,567
Treasury shares: 5,695,618