Jun 2016 Joined the Company Manager, Administration Department Deputy General Manager, Administration Headquarters and General Manager, Planning and Finance Department General Manager, Administration Headquarters Director, General Manager of Administration Division (current)

Apr 1993 Joined the Company Apr 2015 General Manager, General Affairs Section, Administration Division, and General Manager, Information Systems Section Feb 2016 General Manager, General Affairs Section, Administration Division Jun 2023 Full-time Director (Audit and Supervisory Committee Member) (current)

Apr 1982 Joined The Hokuriku Bank, Ltd. Apr 1986 Joined CK Metals Co., Ltd. Sep 1991 Director, CK Metals Co., Ltd. Sep 1996 Director, Fushiki Kairiku Unsou Co., Ltd. (current) Apr 1997 Representative Director, President, CK Metals Co., Ltd. (current) Jun 2000 Representative Director, President, Sanetsu Metal Co., Ltd. (now CK Sanetsu Co., Ltd.) (current) Oct 2011 Representative Director, President, Sanetsu Metal Co., Ltd. (newly established through company split; former Sanetsu Metal Co., Ltd. renamed CK Sanetsu Co., Ltd.) (current) Dec 2011 Representative Director, President, Riken CKJV Co., Ltd. (current) Jun 2015 Representative Director, Chairman, the Company (current) May 2018 Representative Director, President, Nichishin Jikin Co., Ltd. (current) Nov 2022 Representative Director, Chairman, Sanetsu Shoji Co., Ltd. (current) Apr 2025 Representative Director, Chairman, Mitani Shindo Co., Ltd. (current)

Apr 2004 Joined CK Metals Co., Ltd. Sep 2016 Fittings Plant Manager, Riken CKJV Co., Ltd. Jun 2018 Director, CK Metals Co., Ltd. Jun 2018 Director, Fittings Plant Manager, Riken CKJV Co., Ltd. Apr 2025 Director, Riken CKJV Co., Ltd. Apr 2025 Executive Officer, Sakai Plant Manager, the Company Jun 2025 Representative Director, President (current)

Apr 1997 Joined CK Metals Co., Ltd. Sep 2007 Director, Fittings Plant Manager, CK Metals Co., Ltd. Apr 2010 Director, General Manager of Piping Equipment Sales Division, CK Metals Co., Ltd. Jun 2016 Director, the Company, and President, Osaka Brass Company Jun 2018 Director, General Manager of Sales Division (current)

Apr 1999 Joined Sanetsu Metal Co., Ltd. (now CK Sanetsu Co., Ltd.) Mar 2015 Manager, Raw Materials Purchasing Section, Sanetsu Metal Co., Ltd. Jun 2016 Deputy General Manager, Raw Materials Purchasing Office, the Company, and Deputy General Manager, Raw Materials Purchasing Office, Sanetsu Metal Co., Ltd. May 2018 Director, General Manager of Raw Materials Department, Nichishin Jikin Co., Ltd. (current) Apr 2025 Executive Officer, General Manager of Raw Materials Purchasing Office, the Company (current), and Executive Officer, General Manager of Raw Materials Purchasing Office, Sanetsu Metal Co., Ltd. (current) Jun 2026 Director, General Manager of Raw Materials Purchasing Office, the Company (scheduled), and Director, General Manager of Raw Materials Purchasing Office, Sanetsu Metal Co., Ltd.

Apr 1986 Registered as an attorney-at-law; Representative, Hirayama Sogo Law Office (current) Aug 2007 Outside Audit & Supervisory Board Member, the Company Jun 2015 Outside Director (Audit and Supervisory Committee Member) (current)

Apr 1981 Joined The Institute of Energy Economics, Japan Apr 1994 Associate Professor, College of General Education, Shinshu University Apr 1995 Associate Professor, Faculty of Economics, Shinshu University Apr 1999 Professor, Faculty of Economics, Shinshu University Apr 2015 Chairman, Nagano Regional Minimum Wage Council Jul 2018 Professor Emeritus, Shinshu University (current) Jun 2023 Temporary Director (Audit and Supervisory Committee Member), the Company Jun 2023 Outside Director (Audit and Supervisory Committee Member) (current)