Apr 1973 Joined the Company Dec 1998 Director of the Company Dec 2005 Director of the Company; in charge of manufacturing at Tokyo Branch and Plant Manager, Chiba No. 1 Plant Dec 2008 Managing Director of the Company; Head of Manufacturing, Tokyo Branch, and General Manager, Engineering Department Apr 2014 Senior Managing Director of the Company; in charge of Western Japan region Dec 2015 Representative Director, President of the Company Dec 2016 Representative Director, Kawagishi Planning Co., Ltd. Dec 2023 Representative Director, Chairman and Executive Officer of the Company Dec 2025 Director, Chairman and Executive Officer of the Company (current)

Apr 1979 Joined Marubeni Corporation Apr 2018 Director and Senior Managing Executive Officer, General Manager of Building and Steel Structure Division, Itochu Marubeni Sumitomo Techno-Steel Corporation Oct 2020 Advisor, YAMAX Corporation Dec 2022 Managing Director of the Company; Manager, Tokyo Branch Dec 2023 Representative Director, President and Executive Officer of the Company (current) Dec 2024 Representative Director, Kawagishi Planning Co., Ltd. (current)

Apr 1991 Joined the Company Apr 2010 Deputy Manager, Chugoku Branch of the Company Apr 2013 Assistant Branch Manager, Chugoku Branch of the Company Apr 2014 Branch Manager, Western Japan Branch of the Company Jan 2015 Executive Officer, Branch Manager, Western Japan Branch of the Company Dec 2016 Director, Branch Manager, Western Japan Branch of the Company Dec 2019 Managing Director, Branch Manager, Western Japan Branch of the Company Dec 2023 Director, Senior Managing Executive Officer; in charge of Western Japan region of the Company (current)

Apr 1990 Joined Yasuda Trust & Banking Co., Ltd. (now Mizuho Bank, Ltd.) Apr 2012 General Manager, Index Investment Department, Mizuho Trust & Banking Co., Ltd. Oct 2016 Executive Officer, General Manager of IT Systems and Operations Division, Asset Management One Co., Ltd. Dec 2020 Joined the Company Jan 2024 Executive Officer, General Manager of Management Planning Office of the Company Dec 2024 Director, Executive Officer, General Manager of Management Planning Office and General Manager of Administration Division of the Company (current)

Apr 1996 Joined the Company Apr 2014 Manufacturing Department Manager, Chiba No. 1 Plant, Tokyo Branch of the Company Apr 2019 Deputy Plant Manager and Manufacturing Department Manager, Chiba No. 1 Plant, Tokyo Branch of the Company Jan 2024 Executive Officer, Plant Manager, Chiba No. 1 Plant, Tokyo Branch of the Company Oct 2025 Executive Officer, Deputy Branch Manager and Plant Manager, Chiba No. 1 Plant, Tokyo Branch of the Company Dec 2025 Director, Executive Officer, Branch Manager, Tokyo Branch and Plant Manager, Chiba No. 1 Plant of the Company (current)

Apr 1986 Joined Keisei Construction Co., Ltd. Apr 1993 Joined Nissho Iwai Corporation Apr 2012 General Manager, Building and Construction Materials Department, Metalone Kenzai Corporation (now MM Kenzai Corporation) Apr 2022 Managing Executive Officer, General Manager of First Sales Division, MM Kenzai Corporation Dec 2020 Outside Director of the Company (current) Apr 2023 Representative Director, MM Kenzai Engineering Corporation (current)

Apr 1983 Joined Kyowa Bank, Ltd. (now Resona Bank, Ltd.), Mitasaka Branch Apr 2012 General Manager, Credit Management Department, Resona Bank, Ltd. Apr 2018 Managing Director, Resona Business Service Co., Ltd. Oct 2019 Outside Director, Audit and Supervisory Committee Member, Sanno Co., Ltd. (current) Dec 2020 Outside Director of the Company (current) Jan 2025 Outside Director, Topwell Co., Ltd. (current)

Apr 1988 Registered as attorney-at-law (current) Apr 2016 Specially Appointed Professor, Komazawa University Law School (current) Dec 2024 Outside Director of the Company (current)

Apr 1990 Joined Itochu Corporation Oct 2007 Manager, Human Resources Planning Team, Personnel Department, Corporate Planning and Human Resources and General Affairs Division, Itochu Marubeni Steel Corporation Apr 2013 General Manager, Steel Products Division 1 Office, Itochu Marubeni Steel Corporation Nov 2023 General Manager, Internal Control Promotion Office, Management Division, Itochu Marubeni Steel Corporation Apr 2025 Director, Executive Officer, Acting General Manager of Building and Steel Structure Division, Itochu Marubeni Sumitomo Techno-Steel Corporation (current) Dec 2025 Outside Director of the Company (current)

Apr 1984 Joined Daiwa Bank, Ltd. (now Resona Bank, Ltd.), Setagaya Branch Mar 2006 Branch Manager, Asakusabashi Branch, Resona Bank, Ltd. Apr 2008 General Manager, Settlement Solutions Office, Resona Bank, Ltd. Apr 2015 Executive Officer, General Manager of Operations Department, Resona Settlement Service Co., Ltd. Apr 2018 Director, General Manager of Operations Division, Resona Settlement Service Co., Ltd. Apr 2019 Full-time Audit & Supervisory Board Member, Resona Settlement Service Co., Ltd. Apr 2020 Advisor of the Company Dec 2020 Standing Audit & Supervisory Board Member of the Company (current)

Apr 1987 Joined Kobe Steel, Ltd. Apr 2015 General Manager, Sheet Sales Department, Iron and Steel Business Division, Kobe Steel, Ltd. Apr 2017 Assistant to General Manager, Iron and Steel Division, Shinko Shoji Co., Ltd. Dec 2021 Outside Audit & Supervisory Board Member of the Company (current) Jun 2024 Managing Executive Officer, in charge of Steel Unit, Metals Division, Shinko Shoji Co., Ltd. (current) Jun 2024 Representative Director, President, Shinsho Tekko Hanbai Co., Ltd. (current)

Apr 1983 Joined Sapporo Regional Taxation Bureau Jul 2017 Director, Koishikawa Tax Office Jul 2020 Director, Edogawa-Kita Tax Office Aug 2021 Registered as certified tax accountant (current) Apr 2025 Full-time Professor, Ohara Graduate School (current) Dec 2025 Outside Audit & Supervisory Board Member of the Company (current)