Directors & Senior Management

As of June 24, 2026

Board of Directors

Chairman of the Board

  • Keiichi Iwata

Keiichi Iwata

Career Summary

Birth Date: October 11, 1957

1982 Joined Sumitomo Chemical Co., Ltd.
2010 Executive Officer
2013 Managing Executive Officer
2018 Senior Managing Executive Officer
2018 Representative Director & Senior Managing Executive Officer
2019 Representative Director & President
2025 Chairman of the Board  (current)

Representative Director & President

  • Nobuaki Mito

Nobuaki Mito

Advanced Medical Solutions Sector

Career Summary

Birth Date: August 4, 1960

1985 Joined Sumitomo Chemical Co., Ltd.
2015 Executive Officer
2018 Managing Executive Officer
2020 Representative Director & Managing Executive Officer
2021 Representative Director & Senior Managing Executive Officer
2024 Senior Managing Executive Officer
2025 President
2025 Representative Director & President (current)

Representative Director

  • Keigo Sasaki

Keigo Sasaki

Corporate Communications, Corporate Planning, Accounting, Finance

Career Summary

Birth Date: February 11, 1963

1986 Joined Sumitomo Chemical Co., Ltd.
2016 Executive Officer
2020 Managing Executive Officer
2025 Senior Managing Executive Officer
2025 Representative Director & Senior Managing Executive Officer (current)

Director

  • Takanari Yamaguchi

Takanari Yamaguchi

Research Planning, Corporate Research Planning and Coordination, DX Acceleration, Intellectual Property, Industrial Technology & Research Laboratory, Advanced Research Laboratory for Fundamental Technologies, Advanced Medical Solutions Sector

Career Summary

Birth Date: June 1, 1962

1991 Joined Sumitomo Chemical Co., Ltd.
2018 Executive Officer
2021 Managing Executive Officer
2025 Senior Managing Executive Officer
2025 Director & Senior Managing Executive Officer  (current)

Important Concurrent Post
2026 Representative Director, S-RACMO Co., Ltd.
2026 Representative Director, RACTHERA Co., Ltd.

Director

  • Shinoi Sakata

Shinoi Sakata

Career Summary

Birth Date: March 31, 1957

1979 Joined Sumitomo Chemical Co., Ltd.
2013 Executive Officer
2016 Director & Vice President, Sumika Technical Information Service, Inc.
2017 Representative Director & President, Sumika Technical Information Service, Inc.
2018 Managing Director, the Japan Chemical Industry Association
2026 Director  (current)

Important Concurrent Post
2023 Outside Director, Kanadevia Corporation
2025 Outside Director, Senshu Ikeda Holdings, Inc.

Outside Director

  • Atsuko Muraki

Atsuko Muraki

Career Summary

Birth Date: December 28, 1955

1978 Joined Ministry of Labour (Currently Ministry of Health Labour and Welfare)
2005 Counsellor for Policy Evaluation, Minister’s Secretariat, Ministry of Health Labour and Welfare
2006 Deputy Director-General, Equal Employment, Children and Families Bureau, Ministry of Health Labour and Welfare
2008 Director-General, Equal Employment, Children and Families Bureau, Ministry of Health Labour and Welfare
2010 Director-General for Policies on Cohesive Society, Cabinet Office
2012 Director-General, Social Welfare and War Victims’ Relief Bureau, Ministry of Health Labour and Welfare
2013 Vice Minister of Health Labour and Welfare, Ministry of Health Labour and Welfare
2015 Retired from Ministry of Health Labour and Welfare
2018 Outside Director, Sumitomo Chemical Co., Ltd. (current)
2025 Outside Director, Oji Holdings Corporation (current)

Outside Director

  • Akira Ichikawa

Akira Ichikawa

Career Summary

Birth Date: November 12, 1954

1978 Joined Sumitomo Forestry Co., Ltd.
2007 Executive Officer & General Manager, Corporate Planning Department, Sumitomo Forestry Co., Ltd.
2008 Director & Managing Executive Officer, Sumitomo Forestry Co., Ltd.
2010 Representative Director & President, Sumitomo Forestry Co., Ltd.
2020 Representative Director, Chairman of the Board, Sumitomo Forestry Co., Ltd. (current)
2022 Outside Director, Sumitomo Chemical Co., Ltd. (current)
2025 Outside Director, Daiwa Securities Group Inc.  (current)

Outside Director

  • Yumiko Noda

Yumiko Noda

Career Summary

Birth Date: January 26, 1960

1982 Joined Bank of America Corporation Tokyo Branch
1996 Deputy General Manager (Head of Structured Finance Department), London Branch, The Long-Term Credit Bank of Japan, Limited
2000 Partner (Head of PPP (Public Private Partnership) and Privatization), PwC Financial Advisory Services Co., Ltd. (Currently PwC Advisory LLC)
2007 Deputy Mayor, Yokohama City
2011 Partner (Head of PPP and Infrastructure Asia-Pacific), PwC Advisory Co., Ltd. (Currently PwC Advisory LLC)
2017 President and Representative Director, Veolia Japan K.K. (Currently Veolia Japan GK)
2020 Chairman and Representative Director, Veolia Japan K.K.
2023 Outside Director, Mizuho Financial Group, Inc. (current)
2024 Outside Director, East Japan Railway Company (current)
2024 Outside Director, Sumitomo Chemical Co., Ltd. (current)
2025 Chairman and Director, Veolia Japan GK (current)

Outside Director

  • Tetsuji Ohashi

Tetsuji Ohashi

Career Summary

Birth Date: March 23, 1954

1977 Joined Komatsu Ltd.
2004 President and Chief Operating Officer (COO), Komatsu America Corp.
2009 Director and Senior Executive Officer, Komatsu Ltd.
2013 President, Representative Director and CEO, Komatsu Ltd. 
2019 Chairman of the Board and Representative Director, Komatsu Ltd.
2025 Senior Advisor, Komatsu Ltd. (current)
2022 Outside Director, Asahi Group Holdings, Ltd. (current)
2026 Outside Director, Sumitomo Chemical Co., Ltd. (current)
2026 Outside Director, SoftBank Group Corp.(current)

Director, Standing Audit & Supervisory Committee Member

  • Kenji Ohno

Kenji Ohno

Career Summary

Birth Date: December 10, 1963

1987 Joined Sumitomo Chemical Co., Ltd.
2016 Executive Officer 
2020 Managing Executive Officer
2025 Director, Standing Audit & Supervisory Committee Member (current)

Director, Audit & Supervisory Committee Member

  • Kunio Nozaki

Kunio Nozaki

Career Summary

Birth Date: October 29, 1956

1979 Joined Sumitomo Chemical Co., Ltd.
2007 Executive Officer
2009 Managing Executive Officer
2014 Senior Managing Executive Officer
2014 Representative Director & Senior Managing Executive Officer
2018 Director & Senior Managing Executive Officer
2019 Director
2019 Standing Audit & Supervisory Board Member 
2025 Director, Standing Audit & Supervisory Committee Member
2026 Director, Audit & Supervisory Committee Member (current)

Outside Director, Audit & Supervisory Committee Member

  • Yoshitaka Kato

Yoshitaka Kato

Career Summary

Birth Date: September 17, 1951

1974 Joined Tetsuzo Ota & Co. (Currently Ernst & Young ShinNihon LLC)
1978 Registered as a certified public accountant (current)
1998 Representative Patner, Showa Ota & Co. (Currently Ernst & Young ShinNihon LLC)
2006 Managing Executive Partner, Ernst & Young ShinNihon (Currently Ernst & Young ShinNihon LLC)
2008 CEO, Ernst & Young ShinNihon LLC (Currently Ernst & Young ShinNihon LLC)
2014 Retired from Ernst & Young ShinNihon LLC
2015 Audit & Supervisory Board Member, Sumitomo Chemical Co., Ltd. (current)
2024 Outside Audit & Supervisory Board Member, Japan Petroleum Exploration Co., Ltd. (current)
2025 Outside Director, Audit & Supervisory Committee Member, Sumitomo Chemical Co., Ltd.  (current)

Outside Director, Audit & Supervisory Committee Member　

  • Michio Yoneda

Michio Yoneda

Career Summary

Birth Date: June 14, 1949

1973 Joined Bank of Japan
1998 General Manager, Sapporo Branch of Bank of Japan
2000 Retired from Bank of Japan
2000 Executive Director, Osaka Securities Exchange (Currently Japan Exchange Group, Inc.)
2001 Executive Director, Osaka Securities Exchange Co., Ltd.
2002 Senior Executive Director, Osaka Securities Exchange Co., Ltd.
2003 President & CEO, Osaka Securities Exchange Co., Ltd.
2013 Director & Representative Executive Officer, Group COO, Japan Exchange Group, Inc. Director, Tokyo Stock Exchange, Inc.
2015 Resigned as Director & Representative Executive Officer, Group COO, Japan Exchange Group, Inc. Resigned as Director, Tokyo Stock Exchange, Inc.
2018 Audit & Supervisory Board Member, Sumitomo Chemical Co., Ltd. 
2020 Outside Director, Toyo Tire Corporation (current)
2025 Outside Director, Audit & Supervisory Committee Member, Sumitomo Chemical Co., Ltd.  (current)

Outside Director, Audit & Supervisory Committee Member　

  • Masamichi Kamimura

Masamichi Kamimura

Career Summary

Birth Date: March 8, 1961

1989 Prosecutor
2023 Superintending Prosecutor, the Sapporo High Public Prosecutors Office
2024 Retirement as Prosecutor
2024 Registered as Attorneys (current)
2025 Outside Director, Audit & Supervisory Committee Member, Sumitomo Chemical Co., Ltd.  (current)

Executive Officers

President

Nobuaki Mito  Advanced Medical Solutions Sector

Executive Vice President

Masaki Matsui ICT & Mobility Solutions Sector

Senior Managing Executive Officer

Seiji Takeuchi

Essential & Green Materials Sector, Business Development for Circular Carbon Economy
Keigo Sasaki

Corporate Communications, Corporate Planning, Accounting, Finance
Takanari Yamaguchi

Research Planning, Corporate Research Planning and Coordination, DX Acceleration, Intellectual Property, Industrial Technology & Research Laboratory, Advanced Research Laboratory for Fundamental Technologies, Advanced Medical Solutions Sector
Koichi Ogino

Process & Production Technology & Safety Planning, Production & Safety Fundamental Technology Center, Engineering, Responsible Care, Procurement, Logistics

Managing Executive Officer

Juan Ferreira

AgroSolutions Div. – International
Akira Nakanishi

Sumitomo Chemical Advanced Technologies LLC, Sumika Semiconductor Materials Texas Inc.
Masao Shimizu

General Affairs, Legal, Sustainability, Internal Control and Audit, Human Resources, Osaka Office Administration
Hiroyoshi Mukai

Planning & Coordination Office, Advanced Medical Solutions Sector, Pharma Solutions Div.
Satoshi Honda

Semiconductor Materials Div., Advanced Inorganic Products Div., Ibaraki Works
Yoshihiro Ino

Planning & Coordination Office, Essential & Green Materials Sector
Tetsuo Takahashi

Planning & Coordination Office, Rabigh Business, Essential Materials Div.
Takeo Kitayama

Resin-related Business Development Dept., Polyolefins Div., Automotive Materials Div., MMA Div.
Noriaki Oku

Chiba Works
Junpei Tsuji

Research Planning Dept., Corporate Research Planning and Coordination Dept., Business Development Office for Circular Carbon Economy
Tadashi Katayama

Agro & Life Solutions Sector
Toshihiro Yamauchi

Corporate Communications Dept., Accounting Dept.
Kyoko Odawara

Japan Chemical Industry Association
Shinichi Takemura

Display Materials Div.
Masao Inoue

AgroSolutions Div. – Japan, Environmental Health Div.

Executive Officer

Sawa Matsubara Finance Dept.
Jongchan Lee Dongwoo Fine-Chem Co., Ltd.
Kazunori Itabashi Sumitomo Chemical Brasil Indústria Química S.A.
Yuji Kato

Corporate Planning Office, Business Development, Planning & Coordination Office, Advanced Medical Solutions Sector
Shigenori Saito Corporate Planning Office, Strategic Planning
Kunishige Edamatsu Planning & Coordination Office, ICT & Mobility Solutions Sector, ICT & Mobility Solutions Research Laboratory
Koji Yano Ehime Works
Toshiaki Taki Oita Works, Okayama Works, Gifu Works
Atsushi Iwata Planning & Coordination Office, Agro & Life Solutions Sector, Agro & Life Solutions Research Laboratory
Akihiko Hiraoka General Affairs Dept., Procurement Dept., Logistics Dept.
Shigeto Minami Human Resources Dept.

About the Company