Chairman of the Board

Oki Matsumoto

Began his career at Salomon Brothers and joined Goldman Sachs in 1990, and became General Partner in 1994 at the age of 30, the youngest ever at that time. He took charge of trading, risk management, capital markets businesses in Asia, and also founded the special situations unit at Goldman. In 1999, he founded Monex which was jointly capitalized with Sony. Monex is listed on Prime Market of the Tokyo Stock Exchange where he is presently Chairman of the Board & CEO.

Monex Group is a major online financial institution that operates retail online brokerages in Japan, US, China (including Hong Kong), and Australia. Monex acquired Coincheck in 2018, and the crypto-asset business became one of the core pillars of the business segments. In 2020, Monex established Japan Catalyst, an investment advisory arm, to pursue investment returns through engagement with listed companies to stimulate Japanese capital markets. 

He served as Financial Counsel to the Prime Minister and also as outside directors of several companies including Tokyo Stock Exchange from June 2008 to 2013. He presently is an outside director of Mastercard, Incorporated and also a Vice Chair of Human Rights Watch.

- Chairman of the Board of Directors, TradeStation Group, Inc. (the Company’s wholly owned subsidiary)

- Chairman, Coincheck, Inc. (the Company’s subsidiary)

- Outside Director, Mastercard Incorporated

Member of the Board

Yuko Seimei

Yuko Seimei started her career at the Sanwa Bank, Ltd. (currently MUFG Bank, Ltd.) in April 2001. She moved to MKS Partners Ltd in December 2006. She joined Monex Hambrecht, Inc. in February 2009 (merged with Monex, Inc. in 2017) and became Representative Director of Monex Hambrecht, Inc. in June 2011. She became Executive Director of Monex Group, Inc. in March 2013, Executive Officer of Monex Group, Inc. in June 2016, and the Representative Director and President of Monex, Inc.in April 2019. She was appointed Representative Executive Officer and Chief Operating Officer of Monex Group, Inc. in January 2020 and Representative Executive Officer, Chief Operating Officer and Chief Financial Officer of Monex Group, Inc. in January 2021. In June 2021, she was appointed to Member of the Board of  Monex Group, Inc. and since April 2022, she has served as a Member of the Board, Representative Executive Officer, Co-Chief Executive Officer and Chief Financial Officer of Monex Group, Inc.

- Representative Director & President, Monex, Inc.

- Director, TradeStation Group, Inc.

Member of the Board

Takashi Oyagi

Takashi Oyagi started his career at the Bank of Japan in April 1991. After receiving an MBA from the University of Chicago’s Graduate School of Business, he joined Goldman Sachs (Japan) Ltd. In April 1999, he joined (the former) Monex, Inc. as one of the four founding members. Oyagi joined Deutsche Bank Securities, Inc. in New York in May 2004.
 

In August 2007, he became CEO and President of MBH America, Inc., the Company’s U.S. subsidiary, upon its establishment. He was appointed Executive Director of the Company in July 2009 and implemented business developments in Beijing and Hong Kong. He assumed his current position as Chief Strategic Officer in February 2011 and became a Member of the Board of Directors in June 2011. He has been a Director and Executive Officer since June 2013.

- Director and CSO, TradeStation Group, Inc. (the Company’s wholly owned subsidiary)

Member of the Board 

Naofumi Yamada

Naofumi Yamada joined Socidea Intellectual Property Office in June 2011. He founded AppReSearch Inc. (Currently PKSHA Technology Inc.) in October 2012 and became its Representative Director. He became Director and Chief Technology Officer of PKSHA Technology Inc. in June 2016, Director of BEDORE Inc. (Currently PKSHA Workplace Inc.)  in October 2016 (current position) and Representative Director of PKSHA xOps Inc. in September 2019. He assumed his current position at the Company in June 2021.

- Executive Director CSO, Coincheck, Inc. (the Company’s subsidiary)

- Patent Attorney, Socidea Intellectual Property Office

Independent Director,

Member of the Board 
(Lead Independent Director)　

Jun Makihara

Jun Makihara joined Goldman Sachs Co., Ltd. in September 1981 and was named a General Partner of Goldman Sachs & Co. in December 1992. He was Co-Head of Investment Banking of its Tokyo Branch, and then became the Co-Branch Manager and Co-Head of Equity Business at the same before he was nominated as Chairman of Neoteny Co., Ltd. in July 2000. Makihara assumed his current position at the Company in June 2006.

- Director, TradeStation Group, Inc. (the Company’s wholly owned subsidiary)  

   (Outside Director in substance)

- Outside Director, Philip Morris International Inc.

Independent Director,

Member of the Board

Fujiyo Ishiguro
 

Fujiyo Ishiguro joined BROTHER INDUSTRIES, LTD. in January 1981. After she worked for Swarovski Japan K.K,, she established Alphametrics, Inc., a consulting firm in Silicon Valley, in September 1994 and assumed the position as its president. She was named a Director of Netyear Group, Inc. in the U.S.A. in January 1999 and assumed the position of Director of Netyear Group Corporation in Japan in July 1999. And She assumed the position of the Representative Director and President of Netyear Group Corporation in May 2000. She assumed her current position as Director of the Company in June 2014.

- Director,Chief Evangelist, Netyear Group, Inc.

- Outside Director, WingArc1st Inc.

- Director of the Board (External), SEGA SAMMY HOLDINGS INC.

- Outside Director, The Shoko Chukin Bank, Ltd.

Independent Director,

Member of the Board

Nobuo Domae
 

Nobuo Domae joined McKinsey & Co., Inc. (Japan) in April 1993. After joining FAST RETAILING CO., LTD. in September 1998, he was named Director and Executive Vice President in November 2004, and then Executive Vice President in November 2008. He also assumed positions of President of FAST RETAILING FRANCE S.A.S. and CEO of FAST RETAILING USA, Inc. He assumed his current position as Director of the Company in June 2016.

- President & Representative Director, Ryohin Keikaku Co., Ltd.

Independent Director,

Member of the Board

Masaaki Koizumi

Masaaki Koizumi has been registered as Certified Public Accountant since August 1991.  He established KOIZUMI C.P.A. OFFICE  in October 2003.  He was appointed as Director of the Company in June 2018.

- Certified Public Accountant , KOIZUMI C.P.A. OFFICE

- Outside Statutory Auditor, K.R.S. Corporation

- Statutory Auditor, TSUKUI CAPITAL CORPORATION

Independent Director,

Member of the Board

Shiho Konno

Shiho Konnno was registered as a Lawyer in April 1991 and established Konno Habataki Law Office in March 2015.  She assumed her current position as Director of the Company in June 2018.

- Attorney-at-law, Shiho Konno Habataki Law Office

- Outside Director,  LIXIL Corporation

Independent Director,

Member of the Board

Ungyong Shu

Ungyong Shu joined  Morgan Guaranty Trust Company of New York, a subsidiary of J.P. Morgan & Company, Inc. in April 1986. May 2001 Managing Director, J.P. Morgan Securities; July 2010 Co-Head of Investment Banking Division, Merrill Lynch Japan Securities Ltd; July 2011 Vice Chairman; Representative Director, Core Value Management, Co., Ltd. since November 2013. He has been a director of the Company since June 2022.
 

- Representative Director, Core Value Management, Co., Ltd.

- Outside Director, Dai-ichi Life Holdings, Inc.

- Outside Director, Sojitz Corporation