Apr 1985 Joined Nippon Steel Corporation Apr 2000 Nippon Steel Corporation, Nagoya Works, General Affairs Group Leader Apr 2009 Nippon Steel Corporation, Human Resources & Labor Relations Dept., Human Resources Group Leader Apr 2011 Nippon Steel Corporation, Bar & Wire Business Unit, Muroran Works, General Manager, General Affairs Dept. Apr 2014 Nippon Steel Corporation, Bar & Wire Business Unit, General Manager, Bar & Wire Sales Dept. Apr 2016 Nippon Steel Corporation, Executive Officer, General Manager, Bar & Wire Business Unit Apr 2019 Nippon Steel Corporation, Managing Executive Officer, General Manager, Osaka Branch Apr 2021 Nippon Steel Corporation, Executive Officer, assigned to the President's Office Apr 2021 the Company, Advisor Jun 2021 the Company, Director, Vice President Apr 2022 the Company, Representative Director, President (current)

Apr 1988 Joined Mitsui Bank (now Sumitomo Mitsui Banking Corporation) May 2006 Vice President, Sumitomo Mitsui Bank Canada Apr 2012 President, Sumitomo Mitsui Bank Canada Apr 2014 General Manager, Hong Kong Branch, Sumitomo Mitsui Banking Corporation Apr 2018 Managing Director, General Manager, Head Office Sales Dept. III, Sumitomo Mitsui Banking Corporation Apr 2020 Managing Director, Deputy General Manager, Asia & Oceania Division, Sumitomo Mitsui Banking Corporation Apr 2022 Managing Director, General Manager, Global Advisory Dept., Sumitomo Mitsui Banking Corporation May 2023 the Company, Managing Officer, Deputy General Manager, Management Administration Dept. Jun 2024 the Company, Executive Officer, General Manager, Management Administration Dept. (current) Jun 2026 the Company, Director, Executive Officer, General Manager, Management Administration Dept. (scheduled)

Apr 1992 Joined Mitsui Mining Co., Ltd. (now the Company) Nov 2008 the Company, Deputy General Manager, Kitakyushu Works Jul 2013 the Company, General Manager, Tochigi Plant, Chemical Machinery Division Dec 2015 the Company, General Manager, Equipment Dept., Kitakyushu Works Apr 2019 the Company, Deputy General Manager and General Manager, Equipment Dept., Kitakyushu Works Jul 2020 the Company, Managing Officer, Deputy General Manager and General Manager, Equipment Dept., Kitakyushu Works Jun 2021 the Company, Executive Officer, General Manager, Kitakyushu Works, Coke Business Division Jun 2025 the Company, Executive Officer, General Manager, Coke Business Division (current) Jun 2026 the Company, Director, Executive Officer, General Manager, Coke Business Division (scheduled)

Apr 1986 Joined Mitsui Mining Co., Ltd. Jan 2012 the Company, General Manager, General Affairs Dept., Kitakyushu Works Jan 2014 General Manager, General Affairs, Ariake Kiden Kogyo Co., Ltd. Oct 2015 the Company, Risk Management Group Leader, Human Resources & General Affairs Dept. May 2018 the Company, General Affairs Group Leader, Human Resources & General Affairs Dept. Jun 2021 the Company, Head of Kyushu Office Jun 2023 the Company, General Manager, Risk Management Office Jun 2025 the Company, Full-time Corporate Auditor (current)

Apr 1995 Joined Sumitomo Corporation Sep 2008 Senior Manager, Carbon Division, Sumitomo Corporation Sep 2008 Coke Sales Group Leader, Coke Dept., the Company Jun 2010 Unit Leader, Carbon & Steel Raw Materials, Sumitomo Corporation of Americas Apr 2015 Sub-leader, Carbon Products Team, Carbon Division, Sumitomo Corporation Apr 2016 Senior Manager, Carbon Division, Sumitomo Corporation Apr 2016 Director, Sumisho CRM Co., Ltd. Oct 2018 Operations & Development Team Leader, Carbon Division, Sumitomo Corporation Jun 2020 the Company, Outside Director (current) Apr 2022 General Manager, Carbon Division, Sumitomo Corporation Apr 2024 Carbon Unit Leader, Sumitomo Corporation (current)

Apr 1981 Joined The Japan Steel Works, Ltd. Apr 2013 Executive Officer, The Japan Steel Works, Ltd. Apr 2015 Managing Executive Officer, The Japan Steel Works, Ltd. Jun 2016 Director, Managing Executive Officer, The Japan Steel Works, Ltd. Apr 2017 President and Representative Director, The Japan Steel Works, Ltd. Apr 2022 Director, The Japan Steel Works, Ltd. Jun 2022 Senior Advisor, The Japan Steel Works, Ltd. Jun 2024 the Company, Outside Director (current)

Apr 1983 Joined Mitsui Bank Apr 2013 Executive Officer, Mitsui Bank May 2015 Advisor, Human Inventory Co., Ltd.; concurrently Advisor, Financial Career Co., Ltd. Jun 2015 President and Representative Director, Human Inventory Co., Ltd.; concurrently President and Representative Director, Financial Career Co., Ltd. May 2019 Advisor, Muromachi Building Service Co., Ltd. Jun 2019 President and Representative Director, Muromachi Building Service Co., Ltd. Jun 2023 Chairman and Representative Director, Muromachi Building Service Co., Ltd.; concurrently President and Representative Director, Humac Co., Ltd. Jun 2024 the Company, Outside Director (current) Dec 2024 Full-time Corporate Auditor, Horai Co., Ltd. (current)

Apr 1993 Joined Nippon Steel Corporation Nov 2007 Labor Relations & Human Resources Group Leader, Hirohata Works General Affairs Dept., Nippon Steel Corporation Nov 2010 General Affairs Group Leader, Tokyo Works, Steel Pipe Business Division, Nippon Steel Corporation Oct 2012 Head of General Affairs Office, Tokyo Works, Steel Pipe Business Division, Nippon Steel & Sumitomo Metal Corporation Jul 2014 Head of Steel Pipe Planning Office, Steel Pipe Planning Dept., Steel Pipe Business Division, Nippon Steel & Sumitomo Metal Corporation Apr 2018 Senior Manager, Affiliated Companies Dept., Nippon Steel & Sumitomo Metal Corporation Apr 2021 Deputy General Manager, Affiliated Companies Dept., Nippon Steel Corporation Apr 2022 General Manager, Affiliated Companies Dept., Nippon Steel Corporation (current) Jun 2022 the Company, Corporate Auditor (current)

Apr 1985 Joined Eiwa Audit Corporation Mar 1989 Registered as Certified Public Accountant Jun 2000 Andersen National Partner, Asahi Arthur Andersen Co., Ltd. Jan 2003 Managing Director, BearingPoint Co., Ltd. Jan 2008 Managing Director, Huron Consulting Group Co., Ltd. Jun 2010 Representative Director, Managing Director, Accounting Advisory Co., Ltd. (current) Jun 2020 the Company, Corporate Auditor (current)