Officers

As of March 27, 2026

Board of Directors
Corporate Auditors
Executive Officers

Board of Directors

Representative Director, Chairman of the Board

Shinji Shimomura

Apr. 1982: Joined the Company

Apr. 2014: Vice President of the Company

Apr. 2015: Senior Vice President

Apr. 2016: Representative Director, President and CEO of Sumitomo(S.H.I.) Construction Machinery Co., Ltd.

Jun. 2016: Director, Senior Vice President of the Company

Apr. 2018: Director, Executive Vice President

Apr. 2019: Representative Director, President and CEO

Jan. 2026: Representative Director, Chairman of the Board

Representative Director, President and CEO

Toshiro Watanabe

Apr. 1986: Joined the Company

Apr. 2020: Vice President

Apr. 2022: Senior Vice President

Jun. 2022: Director, Senior Vice President

Jan. 2024: Director, Executive Vice President and CFO

Jan. 2026: Representative Director, President and CEO

Representative Director, Senior Executive Vice President

Tatsuro Araki

Apr. 1986: Joined the Company

Apr. 2013: President of SEISA Gear, Ltd.

Apr. 2018: Vice President of the Company

Apr. 2021: Senior Vice President

Mar. 2023: Director, Senior Vice President

Jan. 2024: Director, Executive Vice President

Jan. 2026: Representative Director, Senior Executive Vice President

Director

Haruhiko Tsuzuki

Curriculum Vitae

Apr. 1984: Joined the Company

Apr. 2022: Vice President

Jan. 2025: Senior Vice President

Jan. 2026: Executive Vice President

Mar. 2026: Director, Executive Vice President

Director

Masaki Arai

Curriculum Vitae

Apr. 1989: Joined the Company

Jan. 2024: Vice President

Jan. 2025: Senior Vice President

Jan. 2026: Executive Vice President

Mar. 2026: Director, Executive Vice President

Outside Director

Susumu Takahashi

Curriculum Vitae

Feb. 2004: Counselor of The Japan Research Institute, Limited

Aug. 2005: Director General for Economic Research, Cabinet Office

Aug. 2007: Vice Chairman of The Japan Research Institute, Limited

Jun. 2011: Chairman of The Japan Research Institute, Limited

Jun. 2014: Director of the Company

Apr. 2018: Chairman Emeritus of The Japan Research Institute, Limited (resigned in January 2023)

Outside Director

Akio Hamaji

Curriculum Vitae

Apr. 2015: Executive Vice President of Mitsubishi Materials Corporation

Apr. 2016: President of Mitsubishi Aluminum Company, Ltd.

Dec. 2019: Outside Director of Japan Best Rescue System Co., Ltd.

Jun. 2020: Outside Director of the Company

Outside Director

Sumie Morita

Curriculum Vitae

Apr. 1983: Joined Fujitsu Limited

Apr. 2014: Chief Research Officer, Manufacturing Technology Laboratory of Fujitsu Laboratories Ltd.

Nov. 2015: Chief Research Officer, Software Research Laboratory of Fujitsu Laboratories Ltd.
Senior Director, Common Software Technology Department, Fujitsu Limited

Jan. 2018: Chief Manager of Air Conditioning System Development Department, Fujitsu General Limited

Apr. 2019: Corporate Executive of Fujitsu General Limited (in charge of Air Conditioning System Development)

Apr. 2022: Professor, Department of Information and Computer Science, Faculty of Systems Science and Technology, Akita Prefectural University

Mar. 2023: Outside Director of the Company

June. 2024: Outside Director of Nihon Kohden Corporation

June. 2025: Outside Director of BUNKA SHUTTER CO.,LTD.

Outside Director

Miho Hanafusa

Curriculum Vitae

Apr. 1989: Joined Mitsubishi Kasei Corporation

Apr. 2009: General Manager of Commercialization Promotion Department of Mitsubishi Chemical Group Science and Technology Research Center, Inc.

Apr. 2010: Deputy Secretary General of Global Compact Network Japan

Apr. 2012: Manager of KAITEKI Group, Corporate Strategy Office of Mitsubishi Chemical Holdings Corporation

Sep. 2014: Administrative Deputy Chief of Center for Personnel Interchanges between the Government and Private Entities of Cabinet Office
Deputy Director General for Gender Equality Bureau of Cabinet Offices
Deputy Secretary General of Promotion Office for Creating a Society in Which All Women Shine and the Headquarters for the Promotion of Gender Equality of Cabinet Secretariat

Oct. 2016: Manager of Business Development Group, Functional Chemistry Planning Office,
Performance Products Division of Mitsubishi Chemical Corporation

Apr. 2017: Senior Associate Director, General Manager of Information, Electronics & Display Planning Department of Mitsubishi Chemical Corporation

Apr. 2018: Executive Officer, General Manager of Information, Electronics & Display Planning Department of Mitsubishi Chemical Corporation

Apr. 2019: Executive Officer, General Manager of Development Division, General Manager of R&D Promotion Department of Mitsubishi Chemical Corporation

Apr. 2021: President of Mitsubishi Chemical Research Corporation (resigned in Mar. 2025)

Mar. 2026: Outside Director of the Company

Corporate Auditors

Standing Corporate Auditor

Hideo Suzuki

Curriculum Vitae

Apr. 1982: Joined the Company

Jun. 2014: Senior Vice President

Apr. 2018: Executive Vice President

Jun. 2018: Director, Executive Vice President

Apr. 2019: Director, Executive Vice President and CFO

Apr. 2022: Director

Jun. 2022: Auditor

Standing Corporate Auditor

Kazunori Jikihara

Curriculum Vitae

Apr. 1985: Joined the Company

Mar. 2026: Auditor

Outside Corporate Auditor

Masaichi Nakamura

Curriculum Vitae

Apr. 1987: Registered as Certified Public Accountant

Jul. 2014: Representative Partner and Vice President of Ernst & Young ShinNihon LLC

Sep. 2016: Established Masaichi Nakamura CPA Office

Jun. 2017: Outside Auditor of the Company

Outside Corporate Auditor

Mio Minaki

Curriculum Vitae

Oct.2003: Prosecutor of the Tokyo District Public Prosecutors Office

Apr.2004: Prosecutor of the Osaka District Public Prosecutors Office

Apr.2005: Prosecutor of the Fukuoka District Public Prosecutors Office

Apr.2014: Litigation Department Attorney of Ministry of Justice Fukuoka Legal Affairs Bureau

Apr.2016: Prosecutor of the Tokyo District Public Prosecutors Office

Apr.2019: Partner and attorney-at law of Minaki and Kitazawa Law Office

Mar.2024: Outside Auditor at the company

Outside Corporate Auditor

Hajime Watanabe

Curriculum Vitae

Apr.1987: Joined Yokogawa Electric Corporation

Apr.2014: Vice President, Head of Audit and Compliance Headquarters of Yokogawa Electric Corporation

Apr.2016: Vice President, Head of Corporate Administration Headquarters of Yokogawa Electric Corporation

Apr.2018: Vice President, Head of Audit, Compliance and Quality Assurance Headquarters of Yokogawa Electric Corporation

Jun.2020: Standing Corporate Auditor of Yokogawa Electric Corporation

Jun.2024: Executive Advisor of Yokogawa Electric Corporation

Mar.2025: Outside Auditor at the company

Executive Officers

President and CEO	Toshiro Watanabe
Senior Executive Vice President	Tatsuro Araki General Manager, Export Administration Department and General Manager, Energy & Lifeline Segment
Executive Vice President	Taiji Tsuchiya General Manager, Semiconductor Business Development Department
Executive Vice President	Shaun Dean Managing Director, Sumitomo Heavy Industries (Europe) B.V.
Executive Vice President	Haruhiko Tsuzuki General Manager, Ehime Works and General Manager, Logistics & Construction Segment In charge of Production Engineering Department
Executive Vice President	Masaki Arai General Manager, Corporate Global Strategy Group In charge of Human Resources Group, Purchasing Division
Senior Vice President	Morihiro Kondo General Manager, Kansai Office and Chairman, Sumitomo Heavy Industries (China), Ltd. In charge of Internal Control Group, Legal Department, Internal Audit Department, Corporate Economic Security Department, and General Administration Group
Senior Vice President	Mitsukuni Tsukihara General Manager, Material Solutions SBU, Industrial Machinery Segment, Representative Director, President and CEO, Sumitomo Heavy Industries Material Solutions Co., Ltd.
Senior Vice President	Melvin Porter General Manager, Link-Belt Cranes SBU, Logistics & Construction Segment, President and CEO,LBCE Holdings, Inc.
Senior Vice President	Hiroyuki Tominaga General Manager, Industrial Machinery Segment
Senior Vice President	Chie Okamoto General Manager, Mechatronics Segment and Advanced Technologies SBU
Vice President	Takanori Nagai General Manager, Process Plant SBU, Energy & Lifeline Segment, Representative Director, President and CEO, Sumitomo Heavy Industries Environment Co., Ltd.
Vice President	Yoichi Kato General Manager, Energy & Environment SBU, Energy & Lifeline Segment
Vice President	Isamu Mitsuhashi General Manager, Construction Equipment SBU, Logistics & Construction Segment, Representative Director, President and CEO, Sumitomo Construction Machinery Co., Ltd., Representative Director, President and CEO, Sumitomo Construction Machinery Sales Co., Ltd.
Vice President and CIO	Kazuhiro Harada General Manager, Corporate ICT Group
Vice President	Akihisa Miwa General Manager, Drive Technologies SBU, Mechatronics Segment
Vice President	Akira Yamamoto General Manager, Corporate Technology Management Group In charge of Corporate Quality Group
Vice President	Arata Ishimaru General Manager, Corporate Finance, Accounting & Administration Group

*SBU：Strategic Business Unit