Corporate Governance

Oki Matsumoto is an Executive Director, and Executive Chairperson, of Coincheck Group, and also serves as a managing director of Coincheck, Inc. He is also the founder and Chairman of the Board of Monex Group, and holds directorship positions with several of Monex Group’s subsidiaries. Mr. Matsumoto also currently serves as an outside director of Mastercard, Incorporated (since 2016) and as a board member emeritus of Human Rights Watch. Mr. Matsumoto served as an outside director of the Tokyo Stock Exchange from 2008 to 2013 and is a former member of the Financial Counsel to the Prime Minister of Japan. He began his career at Salomon Brothers, then joined Goldman, Sachs & Co. (1990-1998), where he held several leadership positions, including General Partner (1994-1998), before he founded Monex, Inc., a Japanese online brokerage firm (and a predecessor company to Monex Group), in 1999. Mr. Matsumoto has a bachelor’s degree in law from the University of Tokyo.

Gary A. Simanson is an Executive Director, and President and Chief Executive Officer, of Coincheck Group. Mr. Simanson was President and Chief Executive Officer and a director of Thunder Bridge Capital Partners IV, Inc. (NASDAQ: THCP) from January 2021 until the December 2024 completion of the Business Combination. Mr. Simanson is founder of Thunder Bridge Capital, LLC, a private investment vehicle, and has served as its Chief Executive Officer since 2017. He was Chief Executive Officer and a director of Thunder Bridge Capital Partners III, Inc. (NASDAQ: TBCP) from June 2020 until December 2023, Chief Executive Officer and a director of Thunder Bridge Acquisition II, Ltd. (NASDAQ: THBR) from February 2019 until completion of its initial business combination with indie Semiconductor, Inc. (NASDAQ: INDI) in June 2021, and Chief Executive Officer and a director of Thunder Bridge Acquisition, Ltd. (NASDAQ: TBRG) from 2018 until completion of its initial business combination with Repay Holdings Corp. (NASDAQ: RPAY), an omnichannel payments technology provider. Mr. Simanson has also been Managing Director of First Capital Group, L.L.C., an investment banking advisory firm specializing in the financial services industry, bank mergers and acquisitions, strategic planning, capital raising and enterprise risk management, since 1997. He was also a Founder, Vice Chairman and Chief Strategic Officer of Community Bankers Trust Corporation, a $1.2 billion-in-assets bank holding company for Essex Bank (NASDAQ NMS “ESXB”), also serving as its President, Chief Executive and Chief Financial Officer, and as a director since its inception in 2005, until 2011, overseeing (i) its public offering in 2006 as a special purpose acquisition company, Community Bankers Acquisition Corp, (ii) its bank acquisitions and shareholder reformulation in 2008, and (iii) its acquisitions from the FDIC of failed banks in 2008 and 2009. Mr. Simanson has served in various other roles as an executive officer, board member and adviser in regulated industries, including commercial banking, investment banking and financial services. He began his career as an attorney specializing in the securities, bank regulatory and bank merger and acquisition areas at Milbank, Tweed, Hadley & McCloy, LLP, and also served as in-house counsel for a publicly-traded bank holding company. Mr. Simanson is licensed (inactive) to practice law in the states of New York, Colorado and Tennessee. Mr. Simanson received his bachelor’s degree, majoring in Economics, from George Washington University. He earned his MBA, majoring in Finance, from George Washington University, and holds his JD from Vanderbilt University.

Takashi Oyagi is a Non-Executive Director, and serves as Lead Non-Executive Director, of Coincheck Group. He is a founding member of Monex Group, currently serving as a member of its board of directors, an Executive Officer, and Monex Group’s Chief Financial Officer, and is also (i) Executive Chairman of the board of directors of Monex Group’s subsidiary, TradeStation Group, Inc. (and a board member of TradeStation Group’s principal operating subsidiaries), and (ii) the chair of the board of directors of the Monex Group subsidiary, 3iQ Digital Holdings Inc. He has, since April 2025, also served on the board of managers at WMS General Partner LLC, the general partner of Westfield Capital Management L.P., an asset management company in which Monex Group acquired a 20% stake in April 2025. Mr. Oyagi served as a Director in the Global Markets Division of Deutsche Bank Securities, Inc. in New York (2004-2007), and in the Asian Special Situation Group at Goldman Sachs (Japan) Ltd. (1998-1999). He began his career in finance in 1991 at Bank of Japan. Mr. Oyagi has a bachelor’s degree in law from the University of Tokyo and an MBA degree from the University of Chicago.

Yo Nakagawa is an Executive Director, and Chief Planning Officer, of Coincheck Group. He is also a Senior Executive Director of Monex Group and an Expert Director of Coincheck, Inc., as well as a Director of Monex International Limited (Hong Kong) (since 2013). Prior to joining Monex Group, Mr. Nakagawa served as a Director at Mimura Strategic Partners (2005-2011) and as Chief Operating Officer at Fujimaki Japan (2003-2004). Mr. Nakagawa began his career at JP Morgan in 1988. He has a bachelor’s degree in Economics from Keio University in Japan.

Allerd Derk Stikker is a Non-Executive Director of Coincheck Group. He is currently an advisor of BXR Group and a director of a number of portfolio companies of BXR Group. Mr. Stikker joined BXR Group in 2008, initially as Chief Financial Officer of its real estate division, then as BXR Group’s Chief Operating Officer (2011-2014) and Chief Executive Officer (2014-2018). Mr. Stikker, a Dutch citizen, started his career as a banking consultant in the United States, then served as the Chief Financial Officer of IMC, a Dutch financial institution, after returning to Europe. He holds an MBA and a bachelor’s degree in Business Administration from The George Washington University.

David Burg is a Non-Executive Director of Coincheck Group. He is currently Global Group Head, Cyber and Data Resilience, at Kroll, LLC, having joined Kroll in March 2024. At Kroll he is primarily responsible for leading a team of professionals with P&L responsibility and overseeing a global team of cybersecurity and technology professionals who support their clients in their efforts to manage and mitigate risk. Mr. Burg previously worked at Ernst & Young LLP, from April 2018 to February 2024, as Principal and Americas Cyber Leader. From 1998 to 2018 Mr. Burg served in a variety of positions at PricewaterhouseCoopers LLP (PwC) in the United States, including Principal and Global Cyber Security Leader and Principal and U.S. and Global Advisory Cyber Leader, among other positions. Mr. Burg started his career as Project Specialist to Assistance Director of Financial Systems at the University of Pennsylvania Health System from 1993 to 1998. He holds an MBA from Raymond A. Mason School of Business, William & Mary, and a bachelor’s degree from University of Pennsylvania.

Toshihiko Katsuya is an Executive Director of Coincheck Group, and has also served as its Chief Operating Officer since October 1, 2025. From December 10, 2024 through September 23, 2025, he served as a Non-Executive Director of Coincheck Group. Mr. Katsuya served as President & CEO at Aruhi Corporation (currently SBI Aruhi Corporation), a leading Japanese mortgage bank listed on the Tokyo Stock Exchange, from April 2022 until June 2024, after joining in 2021. Before that, from 2006 to 2020, Mr. Katsuya worked for 15 years in various positions at Monex Group, including as President of Monex FX, Inc. in 2010, President of Monex Securities in 2015, COO of Monex Group in 2017, President of Coincheck, Inc. from 2018 to 2019, and CFO of Monex Group in 2019. Before Monex Group he worked for The Mitsubishi Bank, Ltd. (currently MUFG Bank, Ltd.) for 17 years, from 1989 to 2006, where he held various positions, including senior manager of Corporate Planning Division and VP of Investment Banking Division for the Americas. Mr. Katsuya also assumed the positions of Director of Financial Futures Association of Japan in 2017 and Director of Japan Virtual and Crypto Assets Exchange Association in 2019. Mr. Katsuya holds an MBA from the University of California at Berkeley and a bachelor’s degree in law from the University of Tokyo.

Yuri Suzuki is a Non-Executive Director of Coincheck Group. She is currently a senior partner at the Tokyo office of the Japanese law firm, Atsumi & Sakai. Ms. Suzuki is also an audit & supervisory board member at Yayoi Co., Ltd., CAMPFIRE, Inc., and was previously an outside director at Coincheck, Inc., where she was a member of the compensation committee for six months, from June to December 2024. Ms. Suzuki also previously served as a visiting attorney at Kirkland & Ellis LLP from September 2005 to July 2006, and as a director of the Japan Institute of Life Insurance from 2015 to 2023, and as an auditor of FinCity.Tokyo from 2019 to 2025. She was admitted to the bar in Japan in 2001 and to the New York State Bar in 2006. She is a member of the Japan Federation of Bar Associations and the Daini Tokyo Bar Association. Ms. Suzuki has an LLM in Corporation Law from New York University School of Law and a bachelor’s degree in law from Waseda University.

Jessica Sinyin Tan is a Non-Executive Director of Coincheck Group. Since September 30, 2024 she has served as President of life insurance company Sun Life Canada. Prior to Sun Life Canada, Ms. Tan was with PingAn Group for 11 years, serving as its co-CEO and an Executive Director between 2018-2023 to lead its insurance, digital banking, healthcare, and technology businesses. She also served on PingAn Group’s related party transactions and consumer protection committees from 2020 until 2024. Before that, Ms. Tan was a global Partner at McKinsey & Company, working in its U.S. and Asia offices for 13 years. She is currently on several government or non-profit advisory committees or boards, including the Monetary Authority of Singapore (MAS), the Singapore Central Provident Fund, and AGE-WELL, Canada’s technology and aging network. She also serves as a board member for Sea Limited (NYSE: SE), a leading global consumer internet company founded in Singapore in 2009. Ms. Tan graduated from the Massachusetts Institute of Technology (MIT) with a master’s degree in Electrical Engineering & Computer Science, as well as two bachelor’s degrees in Electrical Engineering and Economics.