Mar 1983 Established Total System Consultant Co., Ltd.; Director Apr 1997 Managing Director, Total System Consultant Co., Ltd. Jan 1998 Senior Managing Director, Solxyz Co., Ltd. (following merger) Jan 2000 Managing Director, General Manager of Business Division, Solxyz Co., Ltd. Mar 2000 Senior Managing Director, General Manager of Business Division, Solxyz Co., Ltd. Jan 2004 Representative Director, Senior Managing Director, Solxyz Co., Ltd. Jan 2004 Representative Director, Chairman, F.F.Sol Co., Ltd. Mar 2005 Representative Director, Executive Vice President, Solxyz Co., Ltd. Mar 2006 Representative Director, President, Solxyz Co., Ltd. Sep 2008 Representative Director, President, the Company Dec 2009 Representative Director, Chairman, CoreNext Co., Ltd. Dec 2010 Representative Director, Chairman, E.I.Sol Co., Ltd. Dec 2013 Representative Director, Chairman, the Company Jan 2014 Director, Chairman, Infinit Consulting Co., Ltd. Jan 2015 Representative Director, Chairman, Neumann Co., Ltd. Dec 2017 Director, Asware Co., Ltd. (current) Feb 2018 Director, Chairman, the Company (current) May 2019 Representative Director, Chairman, Fleekdrive Co., Ltd. Apr 2020 Director, Ariadne International Consulting Co., Ltd. Jun 2022 Outside Director, AI Co., Ltd. (current) Jul 2022 Representative Director, Chairman, eek Co., Ltd. Mar 2023 Representative Director, Chairman, Solxyz Co., Ltd. Mar 2024 Director, Chairman, Solxyz Co., Ltd. (current) Dec 2024 Director, F.F.Sol Co., Ltd. (current) Dec 2024 Director, CoreNext Co., Ltd. (current) Jan 2025 Director, Infinit Consulting Co., Ltd. (current) Jan 2025 Director, Fleekdrive Co., Ltd. (current) Jan 2025 Director, eek Co., Ltd. (current)

Jun 1996 Joined OGIS-RI Co., Ltd. Sep 2008 Senior Managing Director, the Company Dec 2013 Director, President, the Company Feb 2017 Representative Director, President, the Company (current) Mar 2019 Director, Solxyz Co., Ltd. (current) Mar 2023 Representative Director, President, Hinode Soft Co., Ltd. (now bubo Co., Ltd.) (current)

Apr 1991 Joined Ricoh Co., Ltd. Sep 2008 Managing Director, the Company Feb 2017 Managing Director, in charge of Administration Division and R&D Division, the Company Feb 2024 Managing Director, in charge of Sales & Marketing Division, the Company Feb 2025 Managing Director, in charge of Administration Division and Sales & Marketing Division, the Company (current)

Apr 1993 Joined OGIS-RI Co., Ltd. Feb 2009 Joined the Company Dec 2016 Executive Officer, General Manager of R&D Division, the Company Feb 2024 Director, General Manager of R&D Division, the Company (current)

Apr 1992 Joined Kenwood Corporation (now JVCKENWOOD Corporation) Aug 2003 Joined Ricoh Co., Ltd. Jan 2009 Joined the Company Dec 2016 Executive Officer, General Manager of Sales & Marketing Division, the Company Jun 2023 Executive Officer, General Manager of Consulting Division, the Company Feb 2024 Director, General Manager of Consulting Division, the Company (current)

Apr 2002 Assistant Professor, Waseda University Apr 2004 Assistant Professor, National Institute of Informatics Apr 2008 Associate Professor, Department of Computer Science and Communications Engineering, Faculty of Science and Engineering, Waseda University; Visiting Associate Professor, National Institute of Informatics Oct 2010 Director, Global Software Engineering Laboratory, Waseda University (current) Oct 2015 Visiting Researcher, École Polytechnique de Montréal Dec 2015 Outside Director (Audit and Supervisory Committee Member), System Information Co., Ltd. Apr 2016 Professor, Department of Computer Science and Communications Engineering, Faculty of Science and Engineering, Waseda University (current); Visiting Professor, National Institute of Informatics (current) Feb 2018 Outside Director, the Company (current) Jan 2021 Vice President, IEEE Computer Society Jan 2025 President, IEEE Computer Society Jan 2026 Past-President, IEEE Computer Society (current)

Apr 1996 Joined Dai-Ichi Kangyo Bank, Ltd. (now Mizuho Bank, Ltd.) Jun 2000 Joined SoftBank Finance Corporation (now SoftBank Corp.) Oct 2000 Transferred to SBI Investment Co., Ltd. (now SBI Holdings, Inc.) Aug 2018 Established Tsukuda Partners Co., Ltd.; Representative Director (current) Sep 2018 Director, Mita Advisory Co., Ltd. (current) Feb 2019 Outside Director (Audit and Supervisory Committee Member), the Company (current) Mar 2019 Representative Director, Chairman, Top Education Center Co., Ltd. (current) Dec 2022 Outside Audit & Supervisory Board Member, OKAN Co., Ltd. (current) Apr 2024 Representative Director, President, Kōyō Co., Ltd. (current)

Sep 1999 Joined Solxyz Co., Ltd. Dec 2013 Audit & Supervisory Board Member, F.F.Sol Co., Ltd. (current) Jan 2014 Audit & Supervisory Board Member, CoreNext Co., Ltd. (current) Jan 2015 General Manager of Accounting Department, Solxyz Co., Ltd. Feb 2018 Director (Audit and Supervisory Committee Member), the Company (current) Mar 2018 Audit & Supervisory Board Member, E.I.Sol Co., Ltd. Apr 2019 Executive Officer, General Manager of Accounting Department, Solxyz Co., Ltd. May 2019 Audit & Supervisory Board Member, Fleekdrive Co., Ltd. (current) Apr 2020 Audit & Supervisory Board Member, Ariadne International Consulting Co., Ltd. Mar 2021 Director, Deputy General Manager of Administration Division and General Manager of Accounting Department, Solxyz Co., Ltd. Dec 2022 Audit & Supervisory Board Member, Asware Co., Ltd. (current) Jan 2023 Audit & Supervisory Board Member, Infinit Consulting Co., Ltd. (current) Jul 2024 Audit & Supervisory Board Member, eF Co., Ltd. (current) Jan 2025 Director, General Manager of Administration Division and General Manager of Accounting Department, Solxyz Co., Ltd. Jan 2026 Director, General Manager of Administration Division, General Manager of General Affairs Department and General Manager of Accounting Department, Solxyz Co., Ltd. (current)

Sep 1991 Joined Arthur Andersen & Co. (now KPMG AZSA LLC) Jan 1995 Joined Mites Co., Ltd. (Ikeda CPA Office) Apr 1996 Joined Nihon Godo Finance Co., Ltd. (now JAFCO Co., Ltd.); seconded to JAFCO Public Consulting Co., Ltd. (now JAFCO Consulting Co., Ltd.) Jan 2000 Opened Nakamura CPA Office; Head (current) Jan 2002 Opened Nakamura Tax Accountant Office; Head (current) Jun 2004 Audit & Supervisory Board Member, E Store Co., Ltd. Jun 2009 Audit & Supervisory Board Member, J-STAR Co., Ltd. (current) Jun 2016 Audit & Supervisory Board Member, Hyakusen Renma Co., Ltd. (current); Outside Director (Audit and Supervisory Committee Member), E Store Co., Ltd. Feb 2017 Outside Director (Audit and Supervisory Committee Member), the Company (current) Aug 2019 Audit & Supervisory Board Member, REAH Technologies Inc. Mar 2025 Audit & Supervisory Board Member, J-STAR Asset Management Co., Ltd. (current)