Notice of Headquarters Relocation

Dear Valued Partners,

We hope this message finds you well. We would like to express our sincere gratitude for your continued support and patronage.

We are pleased to inform you that, due to business expansion, Sankyu Kensetsu Co., Ltd. will be relocating its headquarters to the following address:

■ New Headquarters Address

3F, Shinkanda Building, 1-8-5 Kajicho, Chiyoda-ku, Tokyo 101-0044

■ Previous Address

2F, 3-22-15 Chuo, Warabi-shi, Saitama 335-0004

■ Date of Commencement of Operations

Wednesday, October 15, 2025

With this relocation, all of us at Sankyu Kensetsu will redouble our efforts and continue to serve you with renewed dedication. We kindly ask for your continued support and cooperation.

Sincerely yours,

Toshiki Aoki　President & CEO

Sankyu Kensetsu Co., Ltd.