Apr 1971 Joined Hitachi Maxell, Ltd. (now Maxell, Ltd.) Apr 2011 Representative Director, President, Maxell, Ltd. Jun 2016 Representative Director, Chairman, Maxell, Ltd. Oct 2017 Representative Director, Chairman, Maxell Holdings, Ltd.; Director, Chairman, Maxell, Ltd. Sep 2021 Outside Director, I-O Data Device, Inc. Jun 2022 Outside Director, the Company Jan 2026 Chairman of the Board, the Company (current) Jul 2026 Representative Director, President and Executive Officer, the Company (current)

Apr 1977 Joined Sumitomo Metal Industries, Ltd. (now Nippon Steel Corporation) Jun 1994 General Manager, Iron and Steel Planning Office, Iron and Steel Division, the same company Jun 2001 General Manager, Engineering Division, Engineering Business Division, the same company Jun 2004 General Manager, Accounting Department, the same company Jun 2006 Director, General Manager, Accounting Department, and General Manager, Shared Service Center, the Company Jun 2009 Managing Director, General Manager, Corporate Management Department, the Company Jun 2015 Senior Managing Director, in charge of Management Planning and Control, the Company Apr 2017 Director, Vice President, Chemical Company President, the Company Apr 2019 Director, Vice President, Hokkaido Representative, the Company Jun 2022 Vice President and Executive Officer, Hokkaido Representative, the Company Jun 2023 Hokkaido Representative, the Company Jan 2026 Senior Managing Executive Officer, General Manager, Consolidated Management Office, and Hokkaido Representative, the Company Mar 2026 Senior Managing Executive Officer, General Manager, Accounting and Finance, the Company Jul 2026 Representative Director, Executive Vice President and Executive Officer; in charge of Head Office Departments; General Manager, Accounting and Finance, the Company (current)

Apr 1991 Joined Hokusan Co., Ltd. (now the Company) Apr 2010 Hiroshima Branch Manager, Chugoku Air Water Co., Ltd. Apr 2013 Director, Hiroshima Branch Manager, Chugoku-Shikoku Air Water Co., Ltd. Jun 2014 Chugoku-Shikoku Branch Manager, the Company; Representative Director, President, Chugoku-Shikoku Air Water Co., Ltd. Apr 2016 Executive Officer, Chugoku-Shikoku Branch Manager, the Company; Representative Director, President, Chugoku-Shikoku Air Water Co., Ltd. Apr 2019 Group Executive Officer; Representative Director, President, Chubu Air Water Inc. Oct 2020 Managing Executive Officer, Chubu Branch Manager, Air Water East Japan Inc. Jun 2023 Group Executive Officer; Representative Director, President, Air Water East Japan Inc. Apr 2025 Managing Executive Officer; Green Innovation Unit Leader, Energy Solutions Group; Representative Director, President, Air Water Green Design Inc. Jul 2026 Director, Senior Managing Executive Officer; in charge of Business Divisions; General Manager, Industrial Business Division, the Company (current)

Apr 1989 Senior Consultant, Strategy Consulting Group, Price Waterhouse Consultants Co., Ltd. Apr 1991 Representative, Haga Management Consulting Office (current) Apr 2017 Associate Professor, NUCB Business School, Graduate School of Nagoya University of Commerce and Business Mar 2019 Outside Director, Kyowa Hakko Kirin Co., Ltd. (now Kyowa Kirin Co., Ltd.) Apr 2020 Professor, NUCB Business School, Graduate School of Nagoya University of Commerce and Business (current) Jun 2020 Outside Director, Minebea Mitsumi Inc. (current) Jul 2024 Director, the Company (current)

Jun 1986 Business Analyst, ZS Associates, Inc. Jun 1987 Senior Business Analyst, the same company Aug 1988 International Public Relations Specialist, Yasuda Trust & Banking Co., Ltd. (now Mizuho Trust & Banking Co., Ltd.) Oct 1992 Consultant, IPC Group, Inc. Jul 1994 Managing Principal (President), Japan Intercultural Consulting (current) Apr 2019 Professor, Faculty of Foreign Studies, Kitakyushu City University Jun 2020 Outside Director, MS&AD Insurance Group Holdings, Inc. (current) Apr 2021 Outside Director, Light Works Co., Ltd. Apr 2021 Visiting Professor, Department of Business Design, Faculty of Global Business, Showa Women's University (current) Jul 2025 Outside Director, the Company (current)

Apr 1985 Joined NGK Spark Plug Co., Ltd. May 1998 Controller, NGK Spark Plug U.S.A. May 2000 CFO, the same company Aug 2012 President, NGK Spark Plug do Brasil Ltda. Oct 2015 General Manager, Corporate Planning Department, NGK Spark Plug Co., Ltd. Apr 2016 Executive Officer, General Manager, Corporate Planning Department, the same company Jun 2017 Director, Executive Officer, General Manager, Management Strategy Headquarters, the same company Apr 2019 Director, Senior Executive Officer, General Manager, Management Strategy Headquarters, the same company Jun 2022 Full-time Audit and Supervisory Committee Member, the same company Jun 2024 Advisor, the same company (current) Jul 2025 Advisor, Yokota Enterprise Co., Ltd. Jul 2026 Outside Director, the Company (current)

Apr 1997 Registered as attorney (Daiichi Tokyo Bar Association); joined Kajitani Sogo Law Office (current) Jun 2016 Outside Audit & Supervisory Board Member, Pacific System Co., Ltd. Jun 2017 Outside Director (Audit and Supervisory Committee Member), Tsumura & Co. Jul 2026 Outside Director, the Company (current)

Apr 1989 Joined Osaka Gas Co., Ltd. Apr 2013 Executive Officer, General Manager, Fine Materials Business Division, Osaka Gas Chemicals Co., Ltd. Apr 2016 Director, Energy Technology Research Institute, Osaka Gas Co., Ltd. Apr 2019 Managing Executive Officer, KRI, Inc. Apr 2020 Representative Director, President, the same company Jun 2024 Managing Director, Osaka Research Institute of Industrial Science and Technology Jul 2026 Outside Director, the Company (current)

Apr 1987 Joined Mitsui & Co., Ltd. Oct 1994 New York Head Office, Mitsui & Co. (U.S.A.), Inc. May 2005 General Manager, Sulfur and Sulfuric Acid Office, Inorganic Materials Department, Mitsui & Co., Ltd. May 2008 Deputy General Manager, Human Resources Planning Office, Human Resources and General Affairs Department, the same company May 2010 General Manager, Salt Business Office, Chlor-Alkali Business Division, the same company Jan 2014 Senior Vice President, Fairway Methanol LLC Apr 2019 General Manager, Methanol and Ammonia Business Division, Basic Materials BU, Mitsui & Co., Ltd. Apr 2021 Executive Officer, General Manager, Methanol and Ammonia Business Division, the same company Jun 2021 SVP, General Manager, Americas Chemicals Division, Mitsui & Co. (U.S.A.), Inc. Jul 2024 Advisor, the Company; Special Manager, Planning and Management Department, Global Environment Division Apr 2025 Managing Executive Officer; General Manager, Global Strategy Promotion Division; General Manager, Global Business Development Department, the Company Feb 2026 Managing Executive Officer; General Manager, Global Strategy Promotion Division and Global Business Development Department, the Company; Representative Director, President, Air Water Material Inc. Jun 2026 Director, Air Water Material Inc. (current) Jul 2026 Advisor, the Company (current)

Apr 1990 Joined Sumitomo Trust & Banking Co., Ltd. (now Sumitomo Mitsui Trust Bank, Limited) Jun 2004 Assistant Manager, Planning Department, the same company Jun 2007 Secretary, Secretariat, the same company Aug 2011 Senior Manager, Wholesale Planning Department, the same company Oct 2014 General Manager, Real Estate Finance Department, the same company Oct 2016 Executive Officer, General Manager, Head Office Sales Department No. 8, the same company Jan 2018 Executive Officer, General Manager, Osaka Head Office Sales Department No. 1, the same company Apr 2023 Executive Officer, Branch Manager, Fukuoka Branch and Fukuoka Tenjin Branch, the same company (in charge of Kyushu and Okinawa area) Jun 2025 Advisor, the Company Oct 2025 Executive Officer, General Manager, AW Group Asset Review Promotion Office; Deputy General Manager, Finance and IR Strategy Office, the Company Jan 2026 Executive Officer, General Manager, Finance and IR Strategy Office; General Manager, AW Group Asset Review Promotion Office, the Company Jul 2026 Senior Executive Officer, General Manager, Finance and IR Strategy Department, the Company (current)

Sep 1986 Joined Hokusan Co., Ltd. (now the Company) Apr 2017 Manager, Related Business Planning Department, Corporate Planning Office, the Company Jun 2018 Executive Officer, General Manager, Related Business Planning Department, Corporate Planning Office, the Company Apr 2020 Managing Executive Officer, General Manager, Affiliated Companies Department, the Company Jan 2021 Managing Executive Officer, General Manager, Internal Audit Department, the Company Apr 2021 Managing Executive Officer, Audit Group Leader, CSR Center, the Company Apr 2022 Director, Audit Group Leader, CSR Promotion Office, the Company Apr 2024 Director, Internal Audit Department, the Company Jul 2024 Full-time Audit & Supervisory Board Member, the Company (current)

Apr 1993 Joined Daido Hokusan Co., Ltd. (now the Company) Apr 2017 General Manager, Management Department, the Company Apr 2018 Executive Officer, General Manager, Management Department, the Company Apr 2020 Executive Officer, General Manager, Corporate Planning Department, the Company Oct 2020 Managing Executive Officer, General Manager, Business Planning Department, Air Water East Japan Inc. Apr 2023 Managing Executive Officer, General Manager, Finance and Strategy Office, the Company Oct 2025 Director, Deputy General Manager, Internal Audit Office, the Company Mar 2026 Director, General Manager, Accounting Office, the Company Jul 2026 Full-time Audit & Supervisory Board Member, the Company (current)

Dec 2008 Joined Deloitte Tohmatsu (now Deloitte Touche Tohmatsu LLC) Nov 2012 Registered as Certified Public Accountant Jan 2014 Joined Kawamoto Corporation Jul 2015 General Manager, Corporate Strategy Headquarters, the same company Apr 2018 Executive Officer, Marketing Headquarters Head, the same company Jan 2019 Executive Officer, Head of Corporate Planning Office, the same company Nov 2019 Director, Zhejiang Kawamoto Sanitary Materials Co., Ltd. Dec 2019 Director, Nishiki Co., Ltd. Feb 2020 Director, Sakaki L&E Wise Co., Ltd. Jun 2020 Director, Executive Officer, Head of Management and Head of Corporate Planning Office, Kawamoto Corporation Jun 2022 Managing Director, Executive Officer, Head of Corporate Planning and Management and Head of Corporate Planning Office and Internal Audit Office, the same company Jan 2023 Director, Cross Kogyo Co., Ltd. Jul 2023 Managing Director, Executive Officer, Head of Corporate Planning and Management, Head of Corporate Planning Office, Head of Management Division and Head of Internal Audit Office, Kawamoto Corporation Apr 2026 Managing Director, Executive Officer, Head of Corporate Planning and Management, Head of Management Division, Head of President's Office, Head of Internal Audit Office and General Manager, Human Resources and General Affairs Department, the same company Jul 2026 Full-time Audit & Supervisory Board Member, the Company (current)

Apr 1970 Assistant Judge, Nara District Court Apr 1980 Judge, Osaka Family Court Jan 2001 Presiding Judge, Wakayama Family Court Jun 2002 Chief Judge, Division, Osaka High Court Sep 2004 Presiding Judge, Kobe District Court Apr 2007 Presiding Judge, Osaka Family Court Sep 2008 President, Takamatsu High Court Apr 2010 Professor, Graduate School of Law, Kyoto University Jun 2012 Outside Audit & Supervisory Board Member, Osaka Gas Co., Ltd. Jun 2015 Registered with Osaka Bar Association Jul 2016 Audit & Supervisory Board Member, the Company (current)

Nov 1990 Joined Century Audit Corporation (now EY ShinNihon LLC) Mar 1991 Registered as Certified Public Accountant Mar 1997 Registered as Real Estate Appraiser Sep 2005 Principal, Iwasaki Certified Public Accountant Office (current) Jun 2013 Outside Director, Iseki & Co., Ltd. (current) Jun 2015 Outside Audit & Supervisory Board Member, Nippon Ham Co., Ltd. Jun 2016 Outside Audit & Supervisory Board Member, Olympus Corporation Jun 2024 Outside Audit & Supervisory Board Member, Nippon Kayaku Co., Ltd. (current) Jul 2026 Audit & Supervisory Board Member, the Company (current)

Apr 1978 Joined National Police Agency Mar 1999 Chief, Wakayama Prefectural Police Headquarters Feb 2003 Director, Criminal Investigation Planning Division, Criminal Affairs Bureau, National Police Agency Sep 2005 Chief, Hokkaido Prefectural Police Headquarters Aug 2007 Senior Assistant Commissioner for Policy Evaluation, Secretariat, National Police Agency Aug 2008 Chief, Metropolitan Police Department Administrative Affairs Division Mar 2009 Deputy Commissioner General, Metropolitan Police Department Jan 2010 Director-General, Community Safety Bureau, National Police Agency Aug 2011 Commissioner General, Metropolitan Police Department Apr 2014 Ambassador Extraordinary and Plenipotentiary to Myanmar Jun 2018 Outside Audit & Supervisory Board Member, Daiichi Sankyo Co., Ltd. Jun 2019 Outside Director, Miura Co., Ltd. Jun 2020 Outside Audit & Supervisory Board Member, Taisei Corporation Nov 2023 Member, Expert Panel on Technical Intern Training and Specified Skilled Worker Systems, Ministry of Justice Dec 2024 Chairman, National Organization for Crime Prevention (current) Jul 2026 Audit & Supervisory Board Member, the Company (current)