Jan 1967 Founded Kochi Giken Consultant Aug 1971 Established Kochi Giken Consultant Co., Ltd. (renamed Giken Sekko Co., Ltd. in Aug 1981); Representative Director, President Jan 1978 Established Giken Seisakusho Co., Ltd.; Representative Director, President Oct 1981 Established Giken Tsusho Co., Ltd.; Director Feb 1989 Established Giken Sekko Co., Ltd. (head office moved from Akaoka, Kami District, Kochi to Kochi City); Representative Director, President Sep 1989 Giken Tsusho Co., Ltd. merged with Giken Seisakusho Co., Ltd. and Giken Sekko Co., Ltd.; renamed Giken Seisakusho Co., Ltd.; Representative Director, President May 2010 Representative Director, President of the Company; in charge of New Construction Method Development Business Dec 2013 Representative Director, President of the Company; in charge of New Construction Method Development Business and Administration Division Nov 2014 Representative Director, President of the Company; in charge of New Construction Method Development Business Nov 2020 Representative Director, Chairman of the Company Nov 2023 Honorary Chairman of the Company Dec 2023 Director and Adviser, Giken Sekko Co., Ltd. (current) Nov 2025 Representative Director, Chairman of the Company (current) [Principal Concurrent Position] Director and Adviser, Giken Corporation

Apr 1981 Joined Giken Sekko Co., Ltd. Mar 1999 Head of Western Japan Office, Business Department, Giken Sekko Co., Ltd. Sep 2003 Seconded to Giken America Corporation Feb 2009 Seconded to the Company; Executive Officer, Press-In Method Business Division Head Jun 2011 Executive Officer, Press-In Method Business Division Head, and General Manager, JPA Promotion Office, of the Company Oct 2012 Managing Executive Officer, Giken Sekko Co., Ltd. Nov 2013 Senior Managing Director, Construction Division Head, Giken Sekko Co., Ltd. Nov 2014 Director of the Company; in charge of Overseas Business Nov 2015 Representative Director, President, Giken Sekko Co., Ltd. Sep 2016 Director of the Company Sep 2020 President, Giken Seisakusho Asia Pte., Ltd. Mar 2022 Senior Managing Director of the Company; President, Giken Europe B.V. May 2022 Representative Director, Chairman, Giken Sekko Co., Ltd. Apr 2023 President, Giken America Corporation Nov 2023 Representative Director, President, CEO of the Company May 2025 Representative Director, President, CEO of the Company; in charge of Global Strategy Division Sep 2025 Representative Director, President, CEO of the Company (current)

Apr 1996 Joined the Company Sep 2016 Department Leader, Production Management Department, of the Company Nov 2017 Executive Officer, in charge of Product Business, of the Company Nov 2021 Director, in charge of Product Business, of the Company Nov 2022 Director, in charge of Administration Division, of the Company Nov 2023 Director, Senior Managing Executive Officer, in charge of New Construction Method Development Business and Press-In Method Promotion Business, of the Company Nov 2024 Director, Senior Managing Executive Officer, in charge of New Construction Method Development Business, Press-In Method Promotion Business, and Press-In Technology R&D Center, of the Company Sep 2025 Director, Senior Managing Executive Officer, in charge of Development and Manufacturing Division and Press-In Technology R&D Center, of the Company (current)

Apr 1993 Joined the Company Feb 1996 Seconded to Giken Seisakusho Asia Pte., Ltd. Sep 2015 Department Leader, Accounting Department, of the Company Dec 2016 Executive Officer, General Manager, Administration Division, and General Manager, Accounting Department, of the Company May 2018 Executive Officer, General Manager, Group Finance Department, of the Company Nov 2019 Director of the Company Mar 2022 President, Giken Seisakusho Asia Pte., Ltd. Nov 2023 Managing Executive Officer of the Company Sep 2025 Managing Executive Officer, in charge of Administration Division, of the Company; Director, Giken Seisakusho Asia Pte., Ltd. (current) Nov 2025 Director, Senior Managing Executive Officer, in charge of Administration Division, of the Company (current) [Principal Concurrent Position] Director, Giken Seisakusho Asia Pte., Ltd.

Apr 1993 Joined the Company Nov 2017 Department Leader, Construction Method Business Division, of the Company Aug 2019 Seconded to Giken Europe B.V. Nov 2019 Director, Giken Europe B.V. Dec 2020 Executive Officer, in charge of Overseas Business, of the Company Nov 2021 Director of the Company Mar 2022 President, Giken America Corporation Apr 2023 President, Giken Europe B.V. Nov 2023 Managing Executive Officer of the Company Sep 2025 Managing Executive Officer, in charge of Press-In Method Promotion Business, of the Company; Director, Giken Europe B.V. (current) Nov 2025 Director, Senior Managing Executive Officer, in charge of Press-In Method Promotion Business, Press-In Machinery Business, and Global Strategy Division, of the Company (current) [Principal Concurrent Position] Director, Giken Europe B.V.

Apr 1978 Joined Taiyo Tankou Co., Ltd. (now Taiyo Co., Ltd.) Aug 1984 Director, Taiyo Tankou Co., Ltd. Jul 1986 Executive Vice President, Taiyo Tankou Co., Ltd. Aug 1986 Director, Tosa Warehouse Co., Ltd. (current) Aug 1992 President, Taiyo Tankou Co., Ltd. Jul 1997 President, Taiyo Co., Ltd. (current) Aug 2001 President, Nihon Blade Co., Ltd. Nov 2020 Director of the Company (current) [Principal Concurrent Positions] President, Taiyo Co., Ltd.; Director, Tosa Warehouse Co., Ltd.

Dec 2012 Registered as attorney-at-law Dec 2012 Joined Ohebashi Law Office Sep 2019 Joined Ashurst (Australia) Apr 2021 Registered as attorney in New York State Jan 2022 Partner, Ohebashi Law Office (current) Nov 2024 Director of the Company (current) [Principal Concurrent Position] Partner, Ohebashi Law Office

Mar 2013 Resigned from Kochi Prefectural Government Apr 2015 Joined the Company; Counselor, Administration Department Jun 2018 Resigned from the Company Jul 2018 Legal Adviser of the Company Nov 2019 Audit & Supervisory Board Member of the Company (current)

Apr 1977 Police Constable, Kochi Prefectural Police Feb 2015 Director, Criminal Affairs Department, Kochi Prefectural Police Mar 2017 Retired from Kochi Prefectural Police Apr 2017 Deputy Manager, General Affairs Department, Kochi Branch, Shikoku Electric Power Co., Inc. May 2020 Member, Kochi City Bullying Prevention Committee Apr 2022 Mediation Committee Member, Kochi District and Family Court Nov 2023 Audit & Supervisory Board Member of the Company (current) Apr 2023 Audit & Supervisory Board Member, Giken Corporation (current) [Principal Concurrent Position] Audit & Supervisory Board Member, Giken Corporation

Jan 1994 Joined KPMG Century Audit Corporation (now KPMG AZSA LLC) Apr 1997 Registered as Certified Public Accountant May 2008 Partner, KPMG Century Audit Corporation Sep 2017 Joined Midosuji Audit Corporation Feb 2018 Partner, Midosuji Audit Corporation Jul 2019 Representative Partner, Midosuji Audit Corporation (current) Nov 2025 Director of the Company (current) [Principal Concurrent Position] Representative Partner, Midosuji Audit Corporation

Apr 2001 Joined Shikoku Bank, Ltd. Sep 2016 Research Officer, Personnel Department, Shikoku Bank, Ltd. Sep 2018 Deputy Branch Manager, Kamimachi Branch, Shikoku Bank, Ltd. Jun 2020 Branch Manager, Motoyama Branch, Shikoku Bank, Ltd. Nov 2023 Full-time Audit & Supervisory Board Member of the Company (current)