Apr 1975 Joined the Company Apr 2003 Manager, Tokyo General Office, Tokyo Branch Mar 2004 Director, Tokyo Branch Manager Oct 2006 Director, Orion Sekkei Co., Ltd. (now Orion Plant Service Co., Ltd.) Aug 2007 Director, Tobu Branch Manager Mar 2012 Managing Director Feb 2014 Representative Director, President, NJS Consultants Co., Ltd. (now merged with the Company) Mar 2014 Representative Director, President (current) Oct 2014 Director, NJS Engineers India Pvt. Ltd. Apr 2015 Director, B&E Engineers (now NJS USA Inc.) Nov 2019 Representative Director, President, Clean Partners Co., Ltd., Susaki

Apr 1990 Joined the Company Apr 2009 Manager, Design Department III, Tokyo General Office, Tobu Branch Apr 2013 Manager, Design Department II, Tokyo General Office, Tobu Branch Apr 2015 Executive Officer, Manager, Sapporo Office, Tobu Branch Feb 2020 Director, NJS E&M Co., Ltd. (now Sky Aqua Service Co., Ltd.) Mar 2020 Director, General Manager, Administration Division Mar 2022 Managing Director; General Manager, Administration Division; General Manager, Corporate Management and Information Management (current) May 2023 Representative Director, President, NJS E&M Co., Ltd. (now Sky Aqua Service Co., Ltd.) Jul 2024 Director, NJS Engineers India Pvt. Ltd. (current)

Apr 1993 Joined the Company Apr 2009 Manager, Design Department IV, Tokyo General Office, Tobu Branch Apr 2013 Manager, Sendai Office, Tobu Branch Apr 2014 Executive Officer, Manager, Sendai Office, Tobu Branch Feb 2020 Director, Orion Plant Service Co., Ltd. Mar 2020 Director, General Manager, Tobu Branch Feb 2022 Director, FINDi Co., Ltd. (current) Mar 2022 Managing Director; General Manager, Technology Development and New Business (current) Feb 2023 Representative Director, President, Nihon X-Ray Inspection Co., Ltd. (current) Feb 2024 Representative Director, President, NJS E&M Co., Ltd. (now Sky Aqua Service Co., Ltd.) Apr 2025 Director, CDC Aqua Service Co., Ltd. (now Sky Aqua Service Co., Ltd.) Jan 2026 Representative Director, Chairman, CDC Aqua Service Co., Ltd. (now Sky Aqua Service Co., Ltd.) (current)

Jan 2003 Joined Nihon Hume Co., Ltd. Jun 2022 Executive Officer, President of Kansai Branch and General Manager of Sales Department; Manager, Okayama Sales Office, Nihon Hume Co., Ltd. Apr 2023 Managing Executive Officer, President of Kansai Branch and General Manager of Sales Department, in charge of Precast Sales Promotion, Nihon Hume Co., Ltd. Jun 2023 Director, Nihon Hume Co., Ltd. (current) Apr 2025 Managing Executive Officer, President of Kansai Branch, in charge of Precast Sales Promotion, Nihon Hume Co., Ltd. (current) Mar 2026 Director of the Company (current)

Jan 1993 Joined Malcolm Pirnie, Inc. (now Arcadis, Inc.) Sep 1995 Joined Camp Dresser & McKee Inc. (now CDM Smith Inc.) Feb 2004 Joined NJS Consultants Co., Ltd. (now NJS Co., Ltd.) Mar 2007 Managing Director and CEO, NJS Engineers India Pvt. Ltd. Apr 2012 Executive Officer, Manager, India Office, NJS Consultants Co., Ltd. (now NJS Co., Ltd.) Sep 2015 Director, Manager, India Office, NJS Consultants Co., Ltd. (now NJS Co., Ltd.) Sep 2022 Director, NJS Engineers India Pvt. Ltd. (current) Aug 2024 Deputy General Manager, Global Environment Division, the Company Mar 2025 Director; General Manager, Global Environment Division (current)

Apr 2003 Director General, Nagoya City Waterworks and Sewerage Bureau Apr 2007 Vice Mayor, Nagoya City Sep 2011 Visiting Professor, Chubu University Apr 2012 Specially Appointed Professor, Nagoya City University Jun 2013 Corporate Auditor, Meikou Construction Co., Ltd. Apr 2016 Director of the Company (current)

Apr 1975 Joined Nippon Kokan K.K. (now JFE Engineering Corporation) Apr 2004 General Manager, Electric Power Sales Department, Energy Division, JFE Engineering Corporation Apr 2008 Managing Executive Officer, JFE Engineering Corporation Apr 2009 Corporate Auditor, JFE Engineering Corporation Apr 2011 Representative Director, President, Japan Pipeline Engineering Co., Ltd. (now JFE Pipeline Co., Ltd.) Apr 2014 Advisor, JFE Engineering Corporation Apr 2016 Director of the Company (current)

Mar 1999 Assistant Manager, Public Relations Office, SoftBank Corp. (now SoftBank Group Corp.) Sep 2003 PR Manager, Amazon Japan K.K. (now Amazon Japan G.K.) Feb 2011 Management Team Member, Amazon Japan G.K. Apr 2013 Management Team Member and General Manager, Public Relations, Amazon Japan G.K. Jan 2017 Representative Member, AStory LLC (current) Mar 2022 Director of the Company (current) Dec 2023 Outside Director, Human Life Code Co., Ltd. (current)

Apr 1985 Joined Nippon Kogaku K.K. (now Nikon Corporation) Feb 1990 Joined Seiko Epson Corporation Apr 2000 Seconded to Epson Canada Aug 2005 General Manager, Software Planning and Design Department, Seiko Epson Corporation Apr 2012 Executive Officer, General Manager, IT Promotion Division, Seiko Epson Corporation Apr 2015 Executive Officer, General Manager, Professional Printing Business Division, Seiko Epson Corporation Oct 2017 Executive Officer, Deputy General Manager, Corporate Planning Division, Seiko Epson Corporation Apr 2019 Executive Officer, Deputy General Manager, DX Promotion Division and CIO, Seiko Epson Corporation Apr 2022 Senior Advisor, DX Promotion Division and CIO, Seiko Epson Corporation Mar 2025 Director of the Company (current) May 2025 Representative Director, Finch Co., Ltd. (current)

Apr 1984 Joined the Company Oct 2002 Manager, Design Department I, Tokyo General Office, Tokyo Branch Apr 2006 Manager, Sendai Office, Tokyo Branch Apr 2010 General Manager, River Business Division Jan 2012 General Manager, Internal Audit Department Apr 2014 Executive Officer, General Manager, Internal Audit Department Nov 2017 Corporate Auditor, NJS Consultants Co., Ltd. Mar 2020 Full-time Corporate Auditor of the Company (current)

Apr 1988 Joined Nihon Cement Co., Ltd. (now Taiheiyo Cement Corporation) Mar 2014 General Manager, Second Research Department, Central Research Institute, Taiheiyo Cement Corporation Apr 2020 General Manager, Corporate Planning Department, Nihon Hume Co., Ltd. Apr 2021 Director, Technology Development Center, Nihon Hume Co., Ltd. Jun 2021 Executive Officer, General Manager, Technology Division and Director, Technology Development Center, Nihon Hume Co., Ltd. Feb 2022 Representative Director, President, Confrontier Co., Ltd. Mar 2023 Corporate Auditor of the Company (current) Apr 2023 Director, Managing Executive Officer, Nihon Hume Co., Ltd. (current)

Apr 1989 Joined Fuji Bank, Ltd. (now Mizuho Bank, Ltd.) Apr 2014 General Manager, Second Sales Department, Mizuho Bank, Ltd. Jun 2019 Vice President, J-Lease Co., Ltd. Apr 2021 Deputy Director, General Manager, Corporate Planning Department, Nihon Hume Co., Ltd. Apr 2023 Executive Officer, General Manager, Management Division and General Manager, General Affairs and Human Resources Department, General Manager, Real Estate and Environment Business Division, Nihon Hume Co., Ltd. (current) Mar 2026 Corporate Auditor of the Company (current)