Oct 1990 Joined Nippon Mining Co., Ltd. Apr 2016 Executive Officer, General Manager, Planning and Administration Department, Technology Division, the Company Mar 2018 Executive Officer, General Manager, Planning and Administration Department, Technology Division; Head of Integration Promotion Office, the Company Apr 2018 Executive Officer, Deputy Head, Technology Division; Head of Integration Promotion Office, the Company Jun 2018 Executive Officer, Deputy Head, Technology Division; General Manager, Tantalum & Niobium Business Division, the Company Apr 2019 Director, Managing Executive Officer, Deputy Head, Technology Division; General Manager, Tantalum & Niobium Business Division, the Company Apr 2020 Director, Managing Executive Officer, Head of Technology Division, the Company Apr 2021 Director, Executive Vice President and Executive Officer (Assistant to the President for Technology; Head of Technology Division), the Company Apr 2022 Director, Executive Vice President and Executive Officer (Assistant to the President for Technology; Head of Technology Division; Deputy Head, Project Promotion Division), the Company Apr 2024 Director, Executive Vice President and Executive Officer (Assistant to the President for Technology; Head of Technology Division; Head of Project Promotion Division), the Company Apr 2026 Director, Executive Vice President and Executive Officer (Assistant to the President for Technology), the Company Jun 2026 Director and Chairman of the Board, the Company (current)

Apr 1988 Joined Nippon Mining Co., Ltd. Apr 2019 Executive Officer (in charge of Corporate Planning and Research; General Manager, Corporate Planning Department), the Company Apr 2020 Executive Officer (in charge of Corporate Planning, Research and Logistics; General Manager, Corporate Planning Department), the Company Oct 2020 Executive Officer (in charge of Corporate Planning, Research, ESG Promotion and Logistics; General Manager, Corporate Planning Department), the Company Apr 2021 Director, Managing Executive Officer (overseeing Corporate Planning, ESG Promotion, Accounting and Logistics), the Company Apr 2022 Director, Managing Executive Officer (overseeing Corporate Planning, ESG Promotion, Accounting and Logistics; Senior Advisor, Project Promotion Division), the Company Apr 2023 Representative Director, President and Executive Officer, the Company (current)

Apr 2009 Associate Professor, Faculty of Science and Engineering, Waseda University Apr 2015 Professor, Faculty of Science and Engineering, Waseda University (current) Nov 2016 Specially Appointed Professor, Institute of Industrial Science, The University of Tokyo (current) Nov 2018 Director, Office for Promotion of Diversity, Waseda University Apr 2021 Professor, Graduate School of Engineering, The University of Tokyo Apr 2021 Outside Director, the Company (current) Sep 2022 Deputy Director, Waseda Institute for Advanced Study Sep 2022 Deputy Director, Research and Education Center for Carbon Neutral Society, Waseda University Nov 2023 Outside Director, Tekscend Photomask Corporation (formerly Toppan Photomasks Inc.) (current) Sep 2024 Dean, School of Creative Science and Engineering, Waseda University (current)

Apr 1985 Joined Nippon Mining Co., Ltd. Apr 2017 Executive Officer (in charge of Accounting and Finance; General Manager, Accounting and Finance Department), the Company Apr 2021 Managing Executive Officer (Head of Chile Office), the Company Apr 2024 Advisor to the President, the Company Jun 2024 Director, Full-time Audit and Supervisory Committee Member, the Company (current)

Apr 1978 Joined Shin Nippon Steel Corporation (now Nippon Steel Corporation) Apr 2009 Executive Officer, Nippon Steel Corporation Apr 2012 Managing Executive Officer, Nippon Steel Corporation Jun 2012 Managing Director, Nippon Steel Corporation Apr 2014 Representative Director and Executive Vice President, Nippon Steel Corporation Apr 2018 Director, Nippon Steel Corporation Jun 2018 Senior Advisor, Nippon Steel Corporation Jun 2020 Outside Director, Konica Minolta, Inc. (current) Jul 2020 Advisor, Nippon Steel Corporation; Advisor, NS Solutions Corporation (current) Jun 2022 Outside Director, the Company Jun 2023 Outside Director, Audit and Supervisory Committee Member, the Company (current) Jun 2026 Outside Director, Nidec Corporation (current)

Apr 1974 Joined Nippon Fire & Marine Insurance Co., Ltd. (now Sompo Japan Insurance Inc.) Jun 2003 Executive Officer, Nipponkoa Insurance Co., Ltd. (now Sompo Japan Insurance Inc.) Jun 2004 Managing Executive Officer, Nipponkoa Insurance Co., Ltd. Jun 2005 Director, Managing Executive Officer, Nipponkoa Insurance Co., Ltd. Jun 2009 Representative Director, Senior Managing Executive Officer, Nipponkoa Insurance Co., Ltd. Jun 2011 Representative Director, President and Executive Officer, Nipponkoa Insurance Co., Ltd.; Director, NKSJ Holdings, Inc. (now SOMPO Holdings, Inc.) Apr 2012 Representative Director, Chairman and Executive Officer, NKSJ Holdings, Inc. Sep 2014 Representative Director, President and Executive Officer, Sompo Japan Nipponkoa Insurance Inc. (now Sompo Japan Insurance Inc.); Representative Director, Chairman and Executive Officer, Sompo Japan Nipponkoa Holdings, Inc. (now SOMPO Holdings, Inc.) Apr 2015 Representative Director, Chairman, Sompo Japan Nipponkoa Holdings, Inc. Jun 2015 Director, Chairman, Sompo Japan Nipponkoa Holdings, Inc. Apr 2016 Representative Director, Chairman, Sompo Japan Nipponkoa Insurance Inc. Apr 2018 Director, Chairman, Sompo Japan Nipponkoa Insurance Inc. Jun 2018 Outside Director, Ricoh Leasing Company, Ltd. Jul 2018 President, Japan Civil Society Partnership Organization (general incorporated foundation) (current) Apr 2022 Special Advisor, SOMPO Holdings, Inc. (current) Jun 2023 Outside Director, Audit and Supervisory Committee Member, the Company (current)

Apr 1988 Joined Nippon Oil Corporation (now ENEOS Corporation) Apr 2020 Executive Officer, General Manager, Hydrogen Business Promotion Department, Nippon Oil Corporation Apr 2023 Advisor to the President, ENEOS Corporation Jun 2023 Director, Full-time Audit and Supervisory Committee Member, ENEOS Holdings, Inc. (current) Jun 2024 Director, Audit and Supervisory Committee Member, the Company; Auditor, JX Nippon Oil & Gas Exploration Corporation (now ENEOS Xplora Corporation) (current) Mar 2025 Outside Director, Audit and Supervisory Committee Member, the Company (current)

Dec 1993 Professor, Faculty of Economics, The University of Tokyo Apr 1996 Professor, Graduate School of Economics and Faculty of Economics, The University of Tokyo Feb 2006 President, National Institute for Research Advancement (NIRA) Oct 2007 Dean, Graduate School of Economics and Faculty of Economics, The University of Tokyo Jan 2013 Member, Council on Economic and Fiscal Policy Jun 2015 Outside Director, East Japan Railway Company Apr 2016 Professor, Faculty of International Social Sciences, Gakushuin University Jun 2016 Outside Audit & Supervisory Board Member, Hagoromo Foods Corporation; Professor Emeritus, The University of Tokyo (current) Jun 2018 Outside Director, Shizuoka Bank, Ltd.; Outside Director, Sumitomo Chemical Co., Ltd. (current) Apr 2022 Outside Director, the Company (current) Jun 2022 Outside Director, Hagoromo Foods Corporation (current) Oct 2022 Outside Director, Audit and Supervisory Committee Member, Shizuoka Financial Group, Inc. (current)

Apr 1997 Registered as attorney; joined Okukawa Law Office (current) Apr 2018 Vice President, First Tokyo Bar Association Apr 2018 Managing Director, Kanto Federation of Bar Associations Mar 2021 Member, Corporate Law Study Group and Accounting Audit System Study Group, Legal Research Institute, First Tokyo Bar Association (current) Apr 2022 Family Conciliation Commissioner, Tokyo Family Court (current) Apr 2022 Deputy Head, Gender Equality Promotion Headquarters, First Tokyo Bar Association Jun 2022 Member, Gender Equality Promotion Committee, Japan Federation of Bar Associations (current) Jun 2023 Outside Director, Audit and Supervisory Committee Member, the Company (current) Apr 2024 Acting Head, Gender Equality Promotion Headquarters, First Tokyo Bar Association (current)