Apr 1983 Joined the Company Jun 2007 General Manager, Eastern Sales Department, Sales Division Apr 2018 Executive Officer; Deputy General Manager, Sales Division, and General Manager, Eastern Sales Department Jun 2019 Director, Executive Officer; General Manager, Sales Division, and General Manager, Eastern Sales Department Apr 2020 Director, Executive Officer; General Manager, Sales Division Apr 2023 Representative Director, President Jun 2023 Representative Director, President; in charge of Internal Control Jun 2025 Representative Director, President; in charge of Sales Division and Internal Control Apr 2026 Representative Director, President; in charge of Internal Control (current)

Apr 1980 Joined the Company Apr 2007 General Manager, Bridge Construction Department, Construction Division Apr 2008 General Manager, Bridge Construction Department, Construction Division Apr 2017 Executive Officer; Deputy General Manager, Construction Division Jun 2019 Director, Executive Officer; General Manager, Construction Division Jun 2023 Director, Executive Officer; General Manager, Construction Division; in charge of Occupational Safety and Health Apr 2024 Director; in charge of Occupational Safety and Health Jun 2025 Managing Director; in charge of Production Division and Occupational Safety and Health Apr 2026 Managing Director (current)

Apr 1983 Joined the Company Jun 2007 General Manager, Accounting Department, Administration Division Apr 2018 Executive Officer; Deputy General Manager, Administration Division, and General Manager, Accounting Department Jun 2019 Director, Executive Officer; Deputy General Manager, Administration Division, and General Manager, Accounting Department Jun 2020 Director, Executive Officer; General Manager, Administration Division, and General Manager, Accounting Department; in charge of Compliance Jun 2023 Director, Executive Officer; General Manager, Administration Division; in charge of Compliance Apr 2025 Director; in charge of Compliance Jun 2025 Managing Director; in charge of Administration Division and Compliance Apr 2026 Managing Director; General Manager, Administration Division; in charge of Compliance (current)

Apr 1991 Joined the Company Apr 2024 General Manager, Technical Planning Department, Technology Division, and Head of Maintenance Promotion Office Apr 2025 Executive Officer; General Manager, Maintenance Division, and General Manager, Technical Planning Department Jun 2025 Director, Executive Officer; General Manager, Maintenance Division; in charge of Development Division and Environmental Issues Apr 2026 Director, Executive Officer; General Manager, Maintenance Division; in charge of Environmental Issues (current)

Apr 1991 Professor, Faculty of Engineering, Tottori University Apr 1996 Professor, Graduate School of Engineering, Kyoto University Apr 2006 Professor, Management Research Department, Kyoto University (concurrent) Sep 2010 Member, Social Capital Development Council, Ministry of Land, Infrastructure, Transport and Tourism (current) May 2017 Chairman, Japan Asset Management Association (current) Jun 2018 106th President, Japan Society of Civil Engineers Apr 2019 Professor Emeritus, Kyoto University; Specially Appointed Professor, Management Research Department, Kyoto University (current) Jun 2022 Outside Audit & Supervisory Board Member, Hanshin International Port Corporation (current) Apr 2023 Chairman, Planning Subcommittee, Social Capital Development Council, Ministry of Land, Infrastructure, Transport and Tourism (current) Jul 2023 Chairman, Council for the Promotion of National Resilience, Cabinet Secretariat (current) May 2024 Member, International Standards Strategy Subcommittee, Cabinet Office (current) Sep 2024 Temporary Member, Transport Policy Council, Ministry of Land, Infrastructure, Transport and Tourism (current) Jun 2025 Director of the Company (current)

Apr 1992 Joined Kawasaki Heavy Industries, Ltd. Apr 2002 Joined Takarazuka City Office Feb 2012 Representative Director, NOTICE Co., Ltd. (current) Jun 2025 Director of the Company (current)

Apr 1979 Joined the Company Jun 2013 General Manager, Bridge Manufacturing Department, Wakayama Plant Apr 2016 General Manager, Occupational Safety Department, Wakayama Plant Jun 2019 Full-time Audit & Supervisory Board Member (current)

Oct 1998 Joined Century Audit Corporation (now EY ShinNihon LLP) Apr 2002 Registered as Certified Public Accountant Jun 2007 Left ShinNihon Audit Corporation (now EY ShinNihon LLP); Representative, Seiko Uchida Certified Public Accountant Office (current) Nov 2011 Registered as Certified Tax Accountant Jun 2024 Audit & Supervisory Board Member of the Company (current)

Oct 2005 Registered as Attorney at Law; joined Daiichi Law Office (now Daiichi Law Office LPC) Jul 2010 Seconded to Inspection Bureau, Financial Services Agency, as fixed-term public official Aug 2012 Returned to Daiichi Law Office LPC Jul 2016 Partner Attorney, Daiichi Law Office LPC (current) Dec 2020 Outside Audit & Supervisory Board Member, Niyaku Corporation (current) Jun 2024 Audit & Supervisory Board Member of the Company (current)