H-ONE CO., LTD.

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Board Members

(As of April 1, 2026)

Directors

Representative Director
Seiki Mayumi Seiki Mayumi Career
Director
Masamichi Okuda Masamichi Okuda Career
Outside Director
Keiichiro Maruyama Keiichiro Maruyama Career
Outside Director
Kunihiro Todokoro Kunihiro Todokoro Career
Outside Director
Akiko Yamada Akiko Yamada Career

Audit & Supervisory Board Members

Audit & Supervisory Board Member
Kazuo Yamashita Kazuo Yamashita Career
Audit & Supervisory Board Member (Outside)
Hiroyuki Kawai Hiroyuki Kawai Career
Audit & Supervisory Board Member (Outside)
Hiroki Murakami Hiroki Murakami Career

Operating Officers

President and
Chief Executive Officer
Seiki Mayumi Seiki Mayumi
Executive Vice President
and Chief Operating Officer
Masamichi Okuda Masamichi Okuda
Managing Corporate Officer
Yosuke Suwa Yosuke Suwa
Managing Corporate Officer
Masayuki Tanabe Masayuki Tanabe
Managing Corporate Officer
Chris Millice Chris Millice
Senior Corporate Officer
Hajime Sawaki Hajime Sawaki
Senior Corporate Officer
Taiji Miyamoto Taiji Miyamoto
Senior Corporate Officer
Takaharu Kato Takaharu Kato
Senior Corporate Officer
Shane Hall Shane Hall
Corporate Officer
Hiroyuki Takebe Hiroyuki Takebe
Corporate Officer
Kenichi Miyamura Kenichi Miyamura
Corporate Officer
Masaya Nagata Masaya Nagata
Corporate Officer
Tamotsu Kamei Tamotsu Kamei
Corporate Officer
Ryuichi Nojiri Ryuichi Nojiri
Corporate Officer
Yoshiaki Tsuchino Yoshiaki Tsuchino
Corporate Officer
Wang Bing Wang Bing
Corporate Officer
Carol Henderson Carol Henderson
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