Mar 1999 Joined WDB Co., Ltd. Apr 2005 Executive Officer, WDB Co., Ltd. Jun 2012 Director, WDB Co., Ltd. Jun 2014 Director, the Company Nov 2014 Representative Director, President, the Company (current)

Apr 2008 Joined WDB Co., Ltd. Jul 2014 Executive Officer, the Company Jun 2016 Director, the Company Jan 2019 Director, General Manager of Contract Business Division, the Company Apr 2020 Director, General Manager of Contract Sales Department, the Company Apr 2024 Director, General Manager of Contract Business Management Department, the Company Apr 2026 Director, General Manager of Regulatory Affairs and Quality Assurance Department and General Manager of Evidence Generation Department, the Company (current)

Mar 2007 Joined WDB Co., Ltd. Apr 2011 Executive Officer, the Company Jun 2012 Director, the Company Jun 2014 Analysis Team, WDB Co., Ltd. Apr 2017 General Manager of Contract Business Division, the Company Jan 2019 General Manager of Administration Division, the Company Feb 2019 Director, General Manager of Administration Division, the Company Apr 2020 Director, General Manager of Corporate Management Department, the Company May 2021 Director, General Manager of Administration Division, the Company Apr 2024 Director, General Manager of Productivity Monitoring Office, the Company Feb 2025 Director, General Manager of Process Development Department, the Company (current)

Mar 1998 Joined WDB Co., Ltd. Apr 2010 Director, WDB Medical Co., Ltd. (now the Company) Apr 2012 Director, the Company Mar 2013 Director, Denjo Systems Co., Ltd. (now the Company) Nov 2014 Representative Director, Denjo Systems Co., Ltd. (now the Company) Jun 2023 Executive Officer, General Manager of Clinical Research Business Division, the Company May 2025 Executive Officer, General Manager of Clinical Development Business Division and General Manager of Contract Sales Department, the Company Jun 2025 Director, General Manager of Clinical Development Business Division and General Manager of Contract Sales Department, the Company Apr 2026 Director, General Manager of Clinical Development Department, General Manager of Evidence Generation Department and General Manager of Sales Department, the Company (current)

Mar 2007 Joined WDB Co., Ltd. Apr 2021 General Manager of Corporate Management Department, the Company Apr 2024 Executive Officer, General Manager of Corporate Management Department, the Company May 2025 Executive Officer, General Manager of Corporate Management Department and General Manager of Human Resources Department, the Company Jun 2025 Director, General Manager of Corporate Management Department and General Manager of Human Resources Department, the Company (current)

Apr 2001 Joined Sogo Keiri Kenkyusho Co., Ltd. Dec 2007 Joined Deloitte Touche Tohmatsu LLC Aug 2013 Joined Minato Kobe Tax Accountants Corporation Dec 2013 Registered as Certified Public Accountant Mar 2015 Representative Director, Jigyo Sozo Lab Co., Ltd. (now crest plus Co., Ltd.) (current) May 2015 Representative, Yokogawa CPA Office (current) Aug 2016 Representative Partner, CREST Tax Accountants Corporation (current) Mar 2017 Audit & Supervisory Board Member, Clinical Medicine Research Institute Co., Ltd. Mar 2017 Auditor, Medical Imaging Promotion Organization (General Incorporated Association) Jun 2017 Outside Audit & Supervisory Board Member, Medisere Co., Ltd. Jun 2018 Outside Audit & Supervisory Board Member, the Company Jun 2019 Outside Director, the Company (current) Jan 2021 Outside Director, mediVR, Inc. (current) Nov 2023 Outside Director, GastroMedica Co., Ltd. (current)

Apr 1995 Registered as Attorney-at-Law Apr 2002 Partner, Shohaku Law Office (current) Feb 2003 Registered as Attorney-at-Law in New York State, USA Nov 2018 Outside Audit & Supervisory Board Member, the Company Jun 2020 Outside Director, the Company (current) Nov 2020 Outside Audit & Supervisory Board Member, Prodilight Co., Ltd. Nov 2024 Outside Director (Audit and Supervisory Committee Member), Prodilight Co., Ltd. (current) Jun 2025 Non-Executive Director, Oy Medfiles Ltd. (current)

Apr 1986 Joined Okuuchi Building Co., Ltd. Sep 1986 Joined Work Data Bank Co., Ltd. (now WDB Holdings Co., Ltd.) Nov 1995 Registered as Certified Social Insurance and Labor Consultant Oct 1996 Director, Work Data Bank Co., Ltd. (now WDB Holdings Co., Ltd.) Jul 2000 Senior Managing Director, Work Data Bank Co., Ltd. (now WDB Holdings Co., Ltd.) (current) Apr 2010 Director, Business Succession Partners Co., Ltd. (now WDB Business Succession Partners Co., Ltd.) (current) Apr 2011 Representative Director, the Company Nov 2011 Senior Managing Director, WDB Co., Ltd. (current) Dec 2012 Director, WDB Engineering Co., Ltd. (now WDB Co., Ltd.) (current) Mar 2013 Representative Director, Denjo Systems Co., Ltd. (now the Company) Apr 2014 Representative Director, WDB University Co., Ltd. Jun 2015 Representative Director, WDB Dokuho Co., Ltd. (current) Feb 2017 Director, Nezot Co., Ltd. (current) Mar 2017 Chairman, Oy Medfiles Ltd. (current) Jun 2017 Representative Director, Cobridge Co., Ltd. (current) Jun 2020 Director, WDB Clinical Research Co., Ltd. (now the Company) Jun 2020 Director, WDB Chemical Laboratory Co., Ltd. Jun 2020 Director, Kaken Genex Co., Ltd.

Apr 1980 Joined The Bank of Tokyo, Ltd. (now MUFG Bank, Ltd.) Jun 2004 General Manager, Mumbai Branch, The Bank of Tokyo-Mitsubishi, Ltd. (now MUFG Bank, Ltd.) Oct 2009 Joined Mitsubishi UFJ Securities Co., Ltd. (now Mitsubishi UFJ Morgan Stanley Securities Co., Ltd.) Apr 2016 Joined WDB Co., Ltd. Apr 2016 General Manager, Corporate Management Department, WDB Holdings Co., Ltd. Feb 2017 Director, the Company Oct 2018 Audit & Supervisory Board Member, the Company (current)

Apr 1986 Joined Hapag-Lloyd Japan K.K. Oct 1991 Joined Asahi Shinwa Certified Public Accountants (now Azsa LLC) May 1993 Transferred to Ohta Showa Audit Corporation (now Shin Nihon LLC) Apr 1995 Registered as Certified Public Accountant Feb 1996 Joined Ohta Showa Ernst & Young Co., Ltd. (now EY Tax Co., Ltd.) Nov 1999 Representative, Koide Accounting Office (current) Nov 2005 Representative Director, Magnit Global Japan G.K. (current) Jun 2019 Outside Audit & Supervisory Board Member, the Company (current)

Apr 1995 Registered as Attorney-at-Law, joined Asami Shoichi Law Office (now Asami Law Office) Jun 2000 Partner, Asami Law Office (current) Jul 2008 Director, Shohei Gakuen Educational Corporation (current) Jun 2020 Outside Audit & Supervisory Board Member, the Company (current) Jul 2020 Member, Suginami City Information Disclosure and Personal Information Protection Council (current) Jun 2022 Outside Audit & Supervisory Board Member, King Co., Ltd. (current) Sep 2023 Director, Medical Corporation Shimoda Midorishinkai (current)