Apr 1976 Joined The Nippon Kogyo Bank, Ltd. Apr 2000 Head of e-Business Promotion Planning Department, The Nippon Kogyo Bank, Ltd. Apr 2002 General Manager, Fukuoka Branch Sales Department, Mizuho Corporate Bank, Ltd. May 2004 Joined the Company; Advisor Jul 2004 Director, General Manager, Accounting Department Jul 2007 Managing Director, General Manager, Accounting Department Jul 2010 Representative Director, President May 2024 Representative Director, Chairman (current)

Apr 1978 Joined the Company Apr 1994 General Manager, Industrial Chemicals Manufacturing Department, Takuma Plant Jul 2000 Director, General Manager, Industrial Chemicals Business Division; concurrently General Manager, Industrial Chemicals Manufacturing Department, Takuma Plant Jul 2004 Director, Plant Manager, Takuma Plant; concurrently General Manager, Industrial Chemicals Business Division Jul 2007 Managing Director, Plant Manager, Takuma Plant; concurrently General Manager, Industrial Chemicals Business Division May 2015 Managing Director, General Manager, Production & Technology Division; concurrently Plant Manager, Takuma Plant Jun 2020 Managing Director, General Manager, Production & Technology Division; concurrently General Manager, Ceramics Business Division, Production & Technology Division Aug 2022 Managing Director, General Manager, Ceramics Business Division; concurrently in charge of Technology Coordination Department and Production Division May 2024 Representative Director, President (current)

Apr 1994 Joined the Company Apr 2006 Section Chief, Technology Section, Construction Materials Technology Department, Technology Research Institute, Takuma Plant May 2015 Deputy Manager, Technology Coordination Department, Production & Technology Division Mar 2019 Manager, Technology Coordination Department, Production & Technology Division Jul 2020 Director, Manager, Technology Coordination Department, Production & Technology Division May 2021 Director, General Manager, Technology Division; concurrently Manager, Technology Coordination Department, Technology Division May 2022 Director, General Manager, Production Division; concurrently General Manager, Equipment & Materials Department, Production Division May 2024 Managing Director, in charge of Technology Division and Production Division; concurrently General Manager, Ceramics Business Division (current)

Mar 1986 Joined the Company Jun 1999 Head, Tokyo Office May 2001 Head, Tokyo Office; concurrently Deputy General Manager, Building Materials Sales Department II Oct 2004 Head, Tokyo Office; concurrently Assistant Manager, Building Materials Sales Department II Jul 2006 Head, Tokyo Office; concurrently General Manager, Building Materials Sales Department II May 2008 Head, Tokyo Office; concurrently General Manager, Building Materials Sales Department Jul 2010 Director, General Manager, Building Materials Sales Department I May 2018 Director, General Manager, Building Materials Sales Department May 2025 Director, General Manager, Construction Materials Sales Department Jul 2025 Director, in charge of Housing Materials Sales Department; concurrently General Manager, Construction Materials Sales Department (current)

Apr 1994 Joined Nissha Co., Ltd. Mar 1996 Joined the Company Jun 2016 Group Leader, Materials Group, Equipment & Materials Department, Production & Technology Division Mar 2019 General Manager, Equipment & Materials Department, Production & Technology Division May 2021 General Manager, Production Division; concurrently General Manager, Equipment & Materials Department Jul 2021 Director, General Manager, Production Division; concurrently General Manager, Equipment & Materials Department May 2022 Director, General Manager, Technology Coordination Department May 2024 Director, General Manager, Technology Division; concurrently General Manager, Technology Coordination Department Jul 2025 Director, General Manager, Specialty Chemicals Sales Department (current)

Apr 1996 Joined the Company Jul 2011 Group Leader, Specialty Chemicals Production Group, Production Division, Takuma Plant May 2017 Deputy Manager, Technology Coordination Department, Production & Technology Division May 2021 Deputy Manager, Technology Coordination Department, Technology Division Jul 2022 Manager, Specialty Chemicals Manufacturing Department, Production Division May 2024 General Manager, Production Division; concurrently General Manager, Equipment & Materials Department and Manager, Specialty Chemicals Manufacturing Department, Production Division Jul 2025 Director, General Manager, Technology Division; concurrently General Manager, Technology Coordination Department and Manager, Specialty Chemicals Manufacturing Department, Production Division May 2026 Director, General Manager, Technology Division; General Manager, Technology Coordination Department (current)

Apr 1990 Joined The Nippon Kogyo Bank, Ltd. Feb 2014 Head, Asset Management Solutions Department, Public Corporation Sales Promotion Office, Mizuho Securities Co., Ltd. Apr 2015 Head, Public & Non-Profit Corporation Sales Support Department, Mizuho Securities Co., Ltd. Apr 2016 Head, Corporate Department, Kyoto Branch, Mizuho Securities Co., Ltd. Apr 2021 Senior Adviser, Mizuho Financial Group, Inc. Jul 2021 Joined the Company; Director, General Manager, General Affairs Department Jul 2024 Full-time Corporate Auditor (current)

Apr 1994 Joined The Nippon Kogyo Bank, Ltd. Jul 2014 Chief Relationship Manager, Business Division I, Mizuho Bank, Ltd. Oct 2016 Deputy General Manager, Osaka Business Division I, Mizuho Bank, Ltd. Apr 2020 General Manager, Financial Institutions Division III, Mizuho Bank, Ltd. May 2021 General Manager, Social & Industrial Infrastructure Division IV, Mizuho Bank, Ltd.; concurrently General Manager, Social & Industrial Infrastructure Division IV, Mizuho Securities Co., Ltd. May 2023 Senior Adviser, Real Estate Sales Division II, Mizuho Trust & Banking Co., Ltd. Feb 2026 General Manager, General Affairs Department, the Company Jul 2026 Director, General Manager, General Affairs Department (current)

Oct 1999 Joined Asahi Audit Corporation May 2003 Registered as Certified Public Accountant Sep 2008 Resigned from Azusa Audit LLC Oct 2008 Opened Imaoka Certified Public Accountant Office Feb 2009 Opened Imaoka Certified Public Accountant and Tax Accountant Office (current) Jul 2010 Corporate Auditor of the Company Jul 2015 Director of the Company (current)

Apr 1984 Joined Kyoritsu Co., Ltd. Apr 1994 Chief Representative, New York Representative Office, Kyoritsu Co., Ltd. Jun 2001 Chief Representative, Hong Kong Representative Office, Kyoritsu Co., Ltd. Jun 2012 Executive Officer, General Manager, Osaka Branch, Kyoritsu Co., Ltd. Jun 2015 Director and Executive Officer, General Manager, Overseas Sales Planning Division; concurrently General Manager, Overseas Sales Planning Department, Kyoritsu Co., Ltd. Oct 2017 Director and Managing Executive Officer, General Manager, Sales Planning Division; concurrently General Manager, Sales Planning Department, Kyoritsu Co., Ltd. Jun 2022 President, Kyoritsu Risk Management Co., Ltd. Jun 2024 Full-time Corporate Auditor, Kyoritsu Co., Ltd. Jul 2024 Director of the Company (current)

Apr 1983 Joined The Nippon Kogyo Bank, Ltd. Apr 2010 General Manager, Head Office Business Division III, Mizuho Trust & Banking Co., Ltd. Apr 2011 Executive Officer, General Manager, Trust Business Division III, Mizuho Trust & Banking Co., Ltd. Apr 2012 Managing Executive Officer, General Manager, Corporate Business Group, Mizuho Trust & Banking Co., Ltd.; Officer in charge of Consulting Department and Trust Frontier Development Department Apr 2013 Managing Executive Officer, Mizuho Financial Group, Inc.; Deputy Officer in charge of Large Corporate Unit, Business Corporate Unit, and Financial & Public Institutions Unit Apr 2016 Deputy President and Executive Officer, Head of Sales Operations, Mizuho Trust & Banking Co., Ltd. Apr 2018 Managing Director, Mizuho Trust & Banking Co., Ltd. Jun 2018 President, Japan Investor Solutions & Technology Co., Ltd. Jun 2021 Full-time Corporate Auditor, Tosoh Corporation Jun 2024 Director (Audit and Supervisory Committee Member), WOWOW Inc. Jul 2025 Corporate Auditor of the Company (current)

Apr 1986 Joined Dowa Mining Co., Ltd. Jun 2004 Corporate Staff, Accounting & Finance Division, Dowa Mining Co., Ltd. Apr 2013 Representative Director, President, Waste Management Siam Ltd. Apr 2018 Director, General Manager, Planning Office, DOWA Metal Mines Co., Ltd. Apr 2024 Representative Director, President, Akita Smelting Co., Ltd. Apr 2026 Executive Officer (part-time), General Manager, General Affairs & Legal Department, DOWA Holdings Co., Ltd. Apr 2026 Representative Director, President, DOWA Management Services Co., Ltd. (current) Jul 2026 Corporate Auditor of the Company (current)