Apr 1986 Joined the Company Jun 2012 General Manager, Resources Sales Department, Head Office Jun 2015 Executive Officer, General Manager, Resources Sales Department Apr 2017 Director, President, Atacama Cozan Mine Special Contract Company Jun 2017 Director, in charge of Metals Sales Department; General Manager, Resources Sales Department Oct 2017 Director, in charge of Resources Sales Department and Metals Sales Department Jun 2019 Managing Director, in charge of Resources Sales Department and Metals Sales Department Apr 2021 Representative Director, President (current)

Apr 1988 Joined the Company May 2018 Acting President, Atacama Cozan Mine Special Contract Company Jun 2021 Executive Officer; Director, Torigatayama Mining Office Jun 2023 Executive Officer, in charge of Production Engineering Department and Safety and Environment Office; General Manager, Production Engineering Department Dec 2024 Executive Officer, in charge of Safety and Environment Department and Production Engineering Department; General Manager, Production Engineering Department Jun 2025 Director, Executive Officer, in charge of Safety and Environment Department, Production Engineering Department, and Overseas Resources Business Department (current) Jun 2026 Director, Managing Executive Officer, in charge of Safety and Environment Department, Production Engineering Department, and Overseas Resources Business Department

Apr 1994 Joined the Company May 2019 General Manager, Accounting Department, Head Office Apr 2022 General Manager, Corporate Planning Department, Head Office Jun 2024 Executive Officer, General Manager, Corporate Planning Department Apr 2025 Executive Officer, in charge of Corporate Planning Department; General Manager, Corporate Planning Department (current) Jun 2026 Director, Executive Officer, in charge of Corporate Planning Department and Accounting Department

Oct 2001 Joined the Company Oct 2017 Representative Director, Arukeros Mine Co., Ltd. Jul 2023 General Manager, Resources Development Department, Head Office Jun 2024 Executive Officer, General Manager, Resources Development Department Apr 2025 Executive Officer, in charge of Resources Development Department; General Manager, Resources Development Department (current) Jun 2026 Director, Executive Officer, in charge of Information Systems Department and Resources Development Department; General Manager, Resources Development Department

Apr 1986 Joined the Company Jun 2013 General Manager, Accounting Department, Head Office Jun 2016 Managing Director, Hachinohe Mining Co., Ltd. Jun 2019 Full-time Corporate Auditor Jun 2023 Director, Full-time Audit and Supervisory Committee Member (current)

Apr 1977 Joined Nihon Keizai Shimbun, Inc. (Nikkei Inc.) Mar 2011 Executive Officer, Editorial Bureau Chief, Osaka Head Office, Nikkei Inc. Mar 2012 Managing Executive Officer, Editorial Bureau Chief, Osaka Head Office, Nikkei Inc. Mar 2013 Senior Managing Executive Officer, Representative, Nagoya Branch, Nikkei Inc.; Director, Nikkei Nagoya Production Center Co., Ltd. Mar 2015 Adviser, Nikkei Inc. Jun 2015 Chief Research Director, Japan Center for Economic Research (public interest incorporated association) Mar 2018 Visiting Staff, Nikkei Inc. Jun 2019 Director, the Company (current)

Apr 2002 Professor, Department of Information Engineering, Muroran Institute of Technology Apr 2004 Vice President, Muroran Institute of Technology Apr 2012 Director, Research Center for Environmental Science and Disaster Mitigation, Muroran Institute of Technology Aug 2012 Director, Mikasa Unused Coal Energy Research Facility, Muroran Institute of Technology Oct 2016 Director, Mikasa Underground Coal Gasification Site, Muroran Institute of Technology Apr 2019 Specially Appointed Professor, Graduate School of Engineering, Muroran Institute of Technology (current) May 2019 Professor Emeritus, Muroran Institute of Technology Jun 2021 Director, the Company (current)

Apr 1994 Registered as attorney-at-law; affiliated with Arai Shigetaka Law Office Apr 1999 Affiliated with Aoki Law Office Apr 2004 Attached to Litigation Department, Tokyo Legal Affairs Bureau, Ministry of Justice Apr 2009 Affiliated with Shin-Yotsuya Law Office (current) Apr 2021 Vice President, Second Tokyo Bar Association; Managing Director, Japan Federation of Bar Associations Jun 2022 Director, the Company Jun 2023 Director, Audit and Supervisory Committee Member, the Company (current)

Sep 2002 Visiting Associate Professor (Counselor), Health Care Center, Tokyo Institute of Technology (now Institute of Science Tokyo) Aug 2008 Visiting Professor (Counselor), Health Care Center, Tokyo Institute of Technology (now Institute of Science Tokyo) Mar 2013 Specially Appointed Professor (Counselor), Health Care Center, Tokyo Institute of Technology (now Institute of Science Tokyo) Apr 2021 Professor and Deputy Director, Student Support Center, Tokyo Institute of Technology (now Institute of Science Tokyo); Head, Student Counseling Division; Head, Support Division for Persons with Disabilities, Diversity Promotion Office Oct 2024 Professor and Deputy Director, Ookayama Student Support Center, Institute of Science Tokyo; Director, Student Counseling Support Office; Head, Support Division for Persons with Disabilities, DE&I Office Apr 2025 Specially Appointed Professor, Ookayama Student Support Center, Institute of Science Tokyo (current) Jun 2025 Director, Audit and Supervisory Committee Member, the Company (current)