Apr 1964 Joined the Company Oct 1997 General Manager, Technology Department Jun 1998 Director Jun 2000 Managing Director Jun 2002 Senior Managing Director Jun 2004 Representative Director, President, Shin-Etsu Handotai Co., Ltd. (current) Jul 2007 Representative Director, Senior Managing Director Jun 2009 Representative Director, Executive Vice President Jun 2016 Representative Director, Vice Chairman Jun 2023 Representative Director, Chairman of the Board of Directors (current)

Apr 1978 Joined the Company Dec 1999 Director, Shin-Etsu PVC B.V. (current) Jun 2001 Director Jun 2002 Managing Director Apr 2004 Director, President, Shin-Etsu Handotai America, Inc. (current) Jun 2005 Senior Managing Director Jul 2007 Representative Director, Senior Managing Director Jun 2010 Representative Director, Executive Vice President Jan 2011 Director, President, Shintech Inc. (current) Jun 2016 Representative Director, President (current)

Apr 1968 Joined the Company Jun 2005 General Manager, Gunma Plant Jun 2013 Director, General Manager, Silicones Business Division Jun 2015 Managing Director Jun 2016 Senior Managing Director Jun 2021 Director, Senior Managing Executive Officer (current)

Apr 1976 Joined the Company Jan 2001 General Manager, Operations Department, Semiconductor Division Apr 2004 Director, Shin-Etsu Handotai Co., Ltd. Jun 2006 Director Jun 2009 Managing Director, Shin-Etsu Handotai Co., Ltd. Jun 2010 Managing Director Jun 2017 Senior Managing Director, Shin-Etsu Handotai Co., Ltd. (current) Jun 2021 Director, Senior Managing Executive Officer (current)

Apr 1977 Joined the Company Jun 2001 Director, Shin-Etsu Handotai Co., Ltd. Aug 2004 Managing Director, Shin-Etsu Handotai Co., Ltd. Jun 2005 Director Jun 2019 Full-time Corporate Auditor (current)

Mar 1974 Joined the Company Nov 2012 Chairman, Taiwan Shin-Etsu Silicone Co., Ltd. Jun 2016 Director Jun 2021 Executive Officer Jun 2025 Full-time Corporate Auditor (current)

Jun 2012 Representative Director, President, Sumitomo Corporation Apr 2018 Representative Director, Chairman, Sumitomo Corporation Jun 2018 Director, Chairman, Sumitomo Corporation Jun 2020 Director (current) Jun 2024 Special Advisor, Sumitomo Corporation (current)

Jul 2015 Director, Chief Executive Officer, PPG Industries, Inc. Sep 2016 Chairman and Chief Executive Officer, PPG Industries, Inc. Jun 2022 Director (current) Jan 2023 Chairman, PPG Industries, Inc.

Apr 1983 Research Assistant, Department of Biology, Faculty of Science, The University of Tokyo Jan 2006 Professor, Hayama Center for Advanced Studies, The Graduate University for Advanced Studies (SOKENDAI) Mar 2007 Member, National Public Safety Commission Apr 2014 Director, Vice President, The Graduate University for Advanced Studies (SOKENDAI) Apr 2017 President, The Graduate University for Advanced Studies (SOKENDAI) Apr 2023 Chairman, Japan Arts Council (current) Jun 2023 Director (current)

Apr 2011 Director and Representative Executive Officer, President and CEO, Daiwa Securities Group Inc. Apr 2017 Director, Chairman and Executive Officer, Daiwa Securities Group Inc. Jun 2024 Director (current) Jul 2025 Senior Advisor, Daiwa Securities Group Inc. (current) Chairman, Japan Securities Dealers Association (current)

Jun 2019 Director, General Manager, Technology Planning Division, Nippon Telegraph and Telephone Corporation (now NTT, Inc.) Jun 2022 Managing Executive Officer, General Manager, Research Planning Division, Nippon Telegraph and Telephone Corporation Jun 2023 Representative Director, President, NTT Technocross Corporation (current) Jun 2026 Director (current)

Apr 1985 Appointed Judge Jan 1995 Registered as Attorney-at-Law (Dai-Ichi Tokyo Bar Association) Apr 2004 Professor, Graduate School of Law, Keio University Sep 2013 Partner Attorney, Kagami Law Office (current) Jun 2021 Corporate Auditor (current)

Oct 1989 Joined Ohta Showa Audit Corporation (now EY ShinNihon LLC) Feb 1993 Registered as Certified Public Accountant May 2007 Partner, ShinNihon LLC (now EY ShinNihon LLC) Jul 2010 Senior Partner, ShinNihon LLC (now EY ShinNihon LLC) Oct 2017 Retired from ShinNihon LLC (now EY ShinNihon LLC) Apr 2018 Professor, Graduate School of Commerce, Waseda University Feb 2021 Member, Business Accounting Council, Financial Services Agency (current) Jun 2023 Corporate Auditor (current)

Apr 1981 Joined National Police Agency Jan 2014 Director-General, Criminal Investigation Bureau, National Police Agency Aug 2016 Deputy Commissioner General, National Police Agency Jan 2018 Commissioner General, National Police Agency Oct 2021 Deputy Chief Cabinet Secretary, Cabinet Secretariat Jun 2026 Corporate Auditor (current)