Air Water : Notice Concerning the Publication of the Investigation Report by the Special Investigatiing Committee

To All Concerned Parties

Company Name

Air Water Inc.

April 3, 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 the Publication of the Investigating Report by the Special Investigation Committee

As announced in our press release dated March 31, 2026, titled "Notice Regarding Receipt of the Investigating Report from the Special Investigation Committee and Future Actions," we had implemented partial non-disclosure measures and other necessary actions following the receipt of the investigation report from the Special Investigation Committee.

As these procedures have now been completed, we hereby announce the following.

We sincerely apologize to our shareholders, investors, and all other concerned parties for the significant inconvenience and concern this matter may have caused.

Please refer to the attached documents for the investigation report prepared by the Special Investigation Committee (Summary Version and Detailed Version).

Please note that certain portions of the report have been subject to partial non-disclosure measures in consideration of the protection of personal information, confidential information, and other relevant matters.

Please note that the investigation report disclosed in connection with this matter is available in 2 Japanese only.

Please refer to the following timely disclosure dated April 3, 2026, available on our Japanese website.

Notice Concerning the Publication of the Investigating Report by the Special Investigation Committee

END