Dec 1993 Joined Creative Soufu Co., Ltd. May 2006 Joined the Company; General Manager, CGS Center Jan 2009 Director, General Affairs; concurrently General Manager, CGS Center Jan 2012 Director, General Affairs Department General Manager Jan 2013 Managing Director (Overseer, Management Administration Division) Jan 2015 Senior Managing Director (Overseer, Management Administration Division) Jan 2017 Representative Director, President (current) Sep 2021 Outside Director, Ichisho Kamaboko Co., Ltd. (current) Jun 2024 Outside Director, BSN Media Holdings Co., Ltd. (current)

Mar 1979 Joined the Company Apr 2000 General Manager, Technology Department No. 3 Jan 2006 Director, Deputy Head of Technology Division; General Manager, Technology Department No. 1 Dec 2009 Managing Director (Deputy Overseer, Technology Management Division); General Manager, Technology Department No. 1 Apr 2012 Managing Director (Overseer, Technology Management Division); General Manager, Technology Department No. 1 Jan 2013 Senior Managing Director (Overseer, Technology Management Division); General Manager, Technology Department No. 1 Apr 2013 Senior Managing Director (Overseer, Technology Management Division) Jan 2019 Director, Vice President (Overseer, Technology Management Division) Jan 2025 Director, Vice President (current)

Mar 1980 Joined the Company Apr 2007 General Manager, Technology Department No. 1 Apr 2013 Executive Officer (in charge of Geological Disaster) Jan 2015 Director (Deputy Overseer, Sales Promotion and Technology Management Division) Jan 2017 Director (Deputy Overseer, Sales Promotion Management Division) Jan 2018 Managing Director (Deputy Overseer, Sales Promotion Management Division) Jan 2023 Managing Director (Overseer, Business Management Division) Jan 2025 Senior Managing Director (current)

Apr 1988 Joined the Company Apr 2013 General Manager, Technology Department No. 1 Jan 2017 Director Jan 2023 Director (Deputy Overseer, Business Management Division) Jan 2025 Managing Director (Overseer, Business Management Division) (current)

Apr 1987 Joined the Company Apr 2013 General Manager, Technology Department No. 2 Jan 2017 Director (General Manager, Water Works and Erosion Control Department) Apr 2022 Director (Deputy Overseer, Technology Management Division) Jan 2025 Managing Director (Overseer, Technology Management Division) (current)

Apr 1983 Joined Hokuriku Regional Development Bureau Apr 2018 Assistant Section Chief, Conservation Division, Sabo Department, Water Management and Land Conservation Bureau, Ministry of Land, Infrastructure, Transport and Tourism (MLIT) Apr 2020 Director, Iide Mountain Range Sabo Office, Hokuriku Regional Development Bureau, MLIT Apr 2022 Regional River Coordinator, River Department, Hokuriku Regional Development Bureau, MLIT Apr 2024 River Information Management Officer, River Department, Hokuriku Regional Development Bureau, MLIT Jul 2025 Joined the Company; Executive Officer, Chief Engineer Jan 2026 Managing Director (Deputy Overseer, Business Management Division) (current)

Apr 1983 Joined Niigata Prefecture Apr 2018 Director, Construction Department, Sanjo Regional Promotion Bureau Apr 2019 Director General, Murakami Regional Promotion Bureau Apr 2021 President, Niigata Prefecture Sewerage Public Interest Foundation Apr 2023 Joined the Company; Executive Officer (Deputy Overseer, Business Management Division) Jan 2024 Director (Deputy Overseer, Business Management Division) (current)

Jun 1999 Joined the Company Apr 2022 General Manager, Water Works and Erosion Control Department Jan 2025 Director (Deputy Overseer, Technology Management Division; General Manager, Water Works and Erosion Control Department) (current)

Apr 2000 Joined the Company Apr 2024 General Manager, Road and Structures Department Jan 2025 Director (Deputy Overseer, Technology Management Division; General Manager, Road and Structures Department) (current)

Oct 2004 Registered as attorney-at-law Jul 2010 Established Nakamura Oshiro International Law Office; Representative Attorney (current) Apr 2013 Visiting Professor, Niigata University Law School Jan 2017 Outside Director, Top Culture Co., Ltd. (current) Apr 2024 President, Niigata Bar Association; Director, Japan Federation of Bar Associations Jan 2025 Outside Director (current)

Apr 1983 Joined Niigata Prefecture Apr 2016 Deputy Director General, Industry, Labor and Tourism Department Apr 2018 Director, Niigata Industrial Creation Organization Public Interest Foundation Apr 2022 Joined the Company; General Manager, Internal Audit Department Jan 2023 Director, Audit and Supervisory Committee Member (current)

Jul 2010 Joined Daiichi Insatsusho Co., Ltd. (now DI Palette Co., Ltd.) Apr 2018 Director; Deputy Head, Planning and Development Headquarters; Deputy Head, General Management Headquarters, Daiichi Insatsusho Co., Ltd. Jan 2024 Director, External Relations and Sustainability, DI Palette Co., Ltd. (current) Jan 2025 Outside Director, Audit and Supervisory Committee Member (current)

Apr 1979 Joined Kurashiki Machinery Co., Ltd. (now DMG MORI Precision Boring Co., Ltd.) Sep 2022 Head, Development Headquarters, Kurashiki Machinery Co., Ltd. Sep 2023 General Manager, Systems Department, Kurashiki Machinery Co., Ltd. Oct 2023 General Manager, Systems Department; Executive Officer in charge of Information Equipment Department, Kurashiki Machinery Co., Ltd. Mar 2025 Employed at DMG MORI Precision Boring Co., Ltd. (current) Jan 2026 Outside Director, Audit and Supervisory Committee Member (current)

Apr 2000 Joined Taiko Bank, Ltd. Apr 2004 Joined Deloitte Touche Tohmatsu LLC (retired Sep 2016) Jul 2009 Registered as Certified Public Accountant Nov 2016 Opened Takeishi Certified Public Accountant Office; Director (current) Jan 2017 Registered as Certified Tax Accountant Mar 2018 Representative Director, ORM Consulting Co., Ltd. (current) Jun 2025 Chairman, Niigata Chapter, Tokyo Branch, Japanese Institute of Certified Public Accountants (current) Jan 2026 Outside Director, Audit and Supervisory Committee Member (current)