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Executives

Position Name Career summary, positions, responsibilities and significant concurrent positions
Representative Director & Chairman Murayama Seiichi
April 1980
Joined Nippon Mining Co., Ltd. (Currently JX Advanced Metals Corporation)
April 2010
Executive Officer,
General Manager, Planning & Coordination Dept.,
April 2013
Senior Executive Officer
June 2013
Director & Senior Executive Officer
June 2019
"President & Representative Director, Chief Executive Officer,
Director,
JXTG Holdings, Inc. (Currently ENEOS Holdings Inc.)
April 2023
Representative Director & Chairman (Present)
President & Representative Director
Chief Executive Officer		 Hayashi Yoichi
April 1988
Joined Nippon Mining Co., Ltd. (Currently JX Advanced Metals Corporation)
April 2019
Executive Officer,
General Manager, Planning & Coordination Dept.
April 2021
Director & Executive Officer
April 2022
Director & Executive Officer,
Senior Executive Staff, Project Management Office
April 2023
President & Representative Director, Chief Executive Officer (Present)
Director
Deputy Chief Executive Officer		 Sugawara Shizuo
August 1990
Joined Nippon Mining Co., Ltd. (Currently JX Advanced Metals Corporation)
April 2016
Executive Officer,
General Manager, Planning & Administration Dept., Technology Group
March 2018
Executive Officer,
General Manager, Planning & Administration Dept., Technology Group,
General Manager, Integration Promotion Office
April 2018
Executive Officer,
Deputy General Manager, Technology Group,
General Manager, Integration Promotion Office
June 2018
Executive Officer,
Deputy General Manager, Technology Group,
General Manager, Tantalum and Niobium Division
April 2019
Director & Senior Executive Officer,
Deputy General Manager, Technology Group,
General Manager, Tantalum and Niobium Division
April 2020
Director & Senior Executive Officer,
General Manager, Technology Group (Present)
April 2021
Director & Deputy Chief Executive Officer, (Present)
Assistant to the President (Technology), (Present)
April 2022
Deputy General Manager, Project Management Office
April 2024
General Manager, Project Management Office (Present)
July 2024
Member of the Advisory Council for Material Strategy
(Cabinet Secretariat) (Present)
Director
Deputy Chief Executive Officer		 Ohuchi Yoshiaki
April 1984
Joined Japan Energy Corporation (Currently ENEOS Corporation)
April 2016
Executive Officer,
General Manager, Finance & Investor Relations Department
JX Holdings, Inc. (Currently ENEOS Holdings Inc.)
April 2017
Executive Officer,
General Manager, Finance & Investor Relations Department
JXTG Holdings, Inc. (Currently ENEOS Holdings Inc.)
June 2018
Senior Executive Officer,
General Manager, Finance & Investor Relations Department
JXTG Holdings, Inc.
June 2019
Representative Operating Officer,
JXTG Holdings, Inc.
June 2020
Director,
ENEOS Holdings, Inc.
Auditor,
JX Advanced Metals Corporation
June 2023
Director Deputy Chief Executive Officer,
Assistant to the President (Specially Assigned Matters),
JX Advanced Metals Corporation (Present)
April 2025
In charge of Logistics Dept. (Present)
Outside Director Tokoro Chiharu
April 2009
Associated Professor,
Faculty of Science and Engineering, Waseda University
April 2015
Professor,
Faculty of Science and Engineering, School of Creative Science and Engineering,
Department of Resources and Environmental Engineering,
Waseda University (Present)
November 2016
Project Professor,
Institute of Industrial Science, The University of Tokyo (Present)
November 2018
Director,
Office for Promotion of Equality and Diversity, Waseda University
April 2021
Professor,
Graduate School of Engineering, The University of Tokyo, (Present)
Outside Director,
JX Advanced Metals Corporation (Present)
September 2022
Deputy Director,
Waseda Institute for Advanced Study
Deputy Director,
Waseda Center for a Carbon Neutral Society
November 2023
Independent Director,
Tekscend Photomask Corporation (Present)
September 2024
Dean,
School/Graduate School of Creative Science and Engineering, Waseda University (Present)
Outside Director Ito Motoshige
December 1993
Professor,
Faculty of Economics, The University of Tokyo
April 1996
Professor,
Graduate School of Economics, Faculty of Economics, The University of Tokyo
February 2006
President,
National Institute for Research Advancement
October 2007
Dean,
Graduate School of Economics, Faculty of Economics, The University of Tokyo
January 2013
A Member of the Council on Economic and Fiscal Policy
June 2015
Outside Director,
East Japan Railway Company
April 2016
Professor,
Faculty of International Social Sciences, Gakushuin University
June 2016
Outside Corporate Auditor,
Hagoromo Foods Corporation
Professor,
Emeritus, The University of Tokyo (Present)
June 2018
Outside Director, The Shizuoka Bank, Ltd.
Outside Director, Sumitomo Chemical Co., Ltd. (Present)
April 2022
Outside Director, JX Advanced Metals Corporation (Present)
June 2022
Outside Director, Hagoromo Foods Corporation (Present)
October 2022
Outside Director (Audit & Supervisory Committee Member),
Shizuoka Financial Group, Inc. (Present)
Director
(Full-Time Audit and Supervisory Committee Member)		 Kuroiwa Motohiro
April 1985
Joined Nippon Mining Co., Ltd. (Currently JX Advanced Metals Corporation)
April 2017
Executive Officer,
General Manager, Accounting & Finance Dept.
April 2021
Senior Executive Officer,
General Manager, Chile Office
April 2024
Assistant to the President
June 2024
Director (Full-Time Audit & Supervisory Committee Member) (Present)
Outside Director
(Audit and Supervisory Committee Member)		 Sakuma Soichiro
April 1978
Joined Nippon Steel Corporation
April 2009
Executive Officer,
Nippon Steel Corporation
April 2012
Senior Executive Officer,
Nippon Steel Corporation
June 2012
Managing Director,
Member of the Board, Nippon Steel Corporation
April 2014
Representative Director and Executive Vice President,
Nippon Steel Corporation
April 2018
Director,
Member of the Board, Nippon Steel Corporation
June 2018
Executive Advisor,
Nippon Steel Corporation
June 2020
Outside Director,
Konica Minolta, inc. (Present)
July 2020
Senior Advisor,
NS Solutions Corporation (Present)
June 2022
Outside Director,
JX Advanced Metals Corporation
June 2023
Outside Director (Audit and Supervisory Committee Member),
JX Advanced Metals Corporation (Present)
Outside Director
(Audit and Supervisory Committee Member)		 Futamiya Masaya
April 1974
Joined The Nippon Fire & Marine Insurance Co., Ltd. (Currently Sompo Japan Insurance Inc.)
June 2003
Executive Officer,
General Manager, Presidential Staff Office & IR Office,
NIPPONKOA Insurance Company, Ltd. (Currently Sompo Japan Insurance Inc.)
June 2004
Managing Executive Officer,
NIPPONKOA Insurance Company, Ltd.
June 2005
Representative Director, Senior Managing Executive Officer,
NIPPONKOA Insurance Company, Ltd.
June 2011
"Representative Director President and Chief Executive Officer,
NIPPONKOA Insurance Company, Ltd.
Director,
NKSJ Holdings, Inc. (Currently SOMPO Holdings Inc.)
April 2012
President & Representative Director, Chief Executive Officer,
NKSJ Holdings, Inc.
September 2014
President & Representative Director, Chief Executive Officer,
Sompo Japan Nipponkoa Insurance Inc. (Currently SOMPO Japan Insurance Inc.)
April 2015
Representative Director & Chairman,
Sompo Japan Nipponkoa Holdings, Inc.(Currently SOMPO Hoidlings Inc.)
June 2015
Director & Chairman,
Sompo Japan Nipponkoa Holdings, Inc.
April 2016
Representative Director & Chairman,
Sompo Japan Nipponkoa Insurance Inc.
April 2018
Director & Chairman,
Sompo Japan Nipponkoa Insurance Inc.
June 2018
Outside Director,
Ricoh Leasing Company, Ltd.
July 2018
Representative Director,
Japan Network for Public Interest Activities (Present)
April 2022
Senior Advisor,
Sompo Holdings, Inc. (Present)
June 2023
Outside Director(Audit and Supervisory Committee Member)
JX Advanced Metals Corporation (Present)
Outside Director
(Audit and Supervisory Committee Member)		 Kawaguchi Rika
April 1997
Registered with the Dai-ichi Tokyo Bar Association
Joined the Okukawa Law Office (Present)
April 2018
Vice President, Dai-ichi Tokyo Bar Association
Executive Director, Kanto Federation of Bar Association
March 2021
Member of Dai-ichi Tokyo Bar Association, Comprehensive Legal Research Institute, Companies Act Study Group and Accounting Audit System Study Group (Present)
April 2022
Arbitration Commission of the domestic relations divisions of Tokyo Family Court (Present)
Deputy Director, Dai-ichi Tokyo Bar Association Gender Equality Promotion Headquarters
June 2022
Member of the committee of Headquarters for the Promotion of Gender Equality, Japan Federation of Bar Associations (Present)
June 2023
Outside Director(Audit and Supervisory Committee Member)
JX Advanced Metals Corporation (Present)
April 2024
Acting General Manager, Dai-ichi Tokyo Bar Association Gender Equality Promotion Headquarters (Present)
Outside Director
(Audit and Supervisory Committee Member)		 Shiota Tomoo
April 1988
Joined Nippon Oil Corporation (Currently ENEOS Corporation)
April 2020
Executive Officer,
General Manager,Hydrogen Business Department,
ENEOS Corporation
April 2023
Advisor,
ENEOS Corporation
June 2023
Director,(Full-Time Audit & Supervisory Committee Member),
ENEOS Holdings, Inc. (Present)
June 2024
Director (Audit & Supervisory Committee Member),
JX Advanced Metals Corporation
Corporate Auditor,
ENEOS Xplore Inc. (Present)
April 2025
Outside Director (Audit & Supervisory Committee Member),
JX Advanced Metals Corporation (Present)

Directors Tokoro Chiharu and Itoh Motoshige are Outside Corporate Directors who are not Audit and Supervisory Committee Members.
Directors Sakuma Soichiro, Futamiya Masaya, Kawaguchi Rika and Shiota Tomoo are Directors who are Audit and Supervisory Committee Members.