Air Water : Notice Concerning Designation as a Security on Alert and Demand for Payment of Listing Agreement Violation Penalty by the Tokyo Stock Exchange

To All Concerned Parties

Company Name

Air Water Inc.

May 1, 2026

Representative President and

Representative Director

Ryosuke

Matsubayashi

（Code Number 4088 Tokyo Stock Exchange Prime Market, Sapporo Stock Exchange Market）

Contact General Manager of Corporate Communications Office

Keisuke Fukushima

（TEL 06-6252-3966）

Notice Concerning Designation as a Security on Alert and Demand for Payment of Listing Agreement Violation Penalty by the Tokyo Stock Exchange

The Company hereby announces that it received a notification from the Tokyo Stock Exchange, Inc. on April 30, 2026, stating that the Company's shares will be designated as a Security on Alert effective May 1, 2026, and that the Exchange will demand payment of a listing agreement violation penalty.

For details regarding the designation as a Security on Alert and the demand for payment of the listing agreement violation penalty, including the reasons for such measures, please refer to the announcement published on the Japan Exchange Group, Inc. website.

URL: https://www.jpx.co.jp/english/news/1023/20260430-13.html

In response to this designation as a Security on Alert, the Company has positioned the comprehensive review and strengthening of its corporate culture, governance, and internal control framework as its highest management priority. The Company will continue to make steady progress in implementing measures to prevent recurrence and will endeavor to restore trust through the appropriate and timely disclosure of the status of such initiatives.

The Company sincerely apologizes to its shareholders, investors, and all other stakeholders for the significant inconvenience and concern caused.

END