Member of the Board

Chairman of the Board
Oki Matsumoto

Chairman of the Board

Oki Matsumoto

 

Oki Matsumoto became General Partner in 1994 at the age of 30, the youngest ever at that time. He took charge of trading, risk management in Asia, and also founded the special situations unit. 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 & Representative Executive Officer.

 

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 Economic Council Member 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.

 

Important concurrent positions at other organization

 

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

- Chairman, Managing Director & Executive Director, Coincheck, Inc.  (the Company’s subsidiary)

- Chairman & Managing Director, Japan Catalyst, Inc.(the Company’s wholly owned subsidiary)

- Chairman of the Board of Directors, Docomo Monex Holdings, Inc.(our affiliated companies)

- Outside Director, Mastercard Incorporated

Member of the Board
Yuko Seimei

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 in April 2022, she was appointed to a Member of the Board, Representative Executive Officer, Co-Chief Executive Officer and Chief Financial Officer of Monex Group, Inc. Since June 2023, she has served as a Member of the Board, Representative Executive Officer, Chief Executive Officer of Monex Group,Inc.

 

Important concurrent positions at other organization

 

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

- Member of the Board, Docomo Monex Holdings, Inc.(our affiliated companies)

- President, Member of the Board, Executive Director, Monex, Inc.(our affiliated companies)

Member of the Board
Takashi Oyagi

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  became a Member of the Board of Directors in June 2011.In June 2013, he was appointed a Director and Executive Officer. Since April 2023, he has been a Director and Executive Officer and Chief Financial Officer of Monex Group, Inc. 

 

Important concurrent positions at other organization

 

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

Member of the Board
Naofumi Yamada

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 and Representative Director of PKSHA xOps Inc. in September 2019. He assumed his current position at the Company in June 2021.

 

Important concurrent positions at other organization

 

- Patent Attorney, Socidea Intellectual Property Office

Member of the Board
Jun Makihara

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.

 

Important concurrent positions at other organization

 

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

   (Outside Director in substance)

- Outside Director, Philip Morris International Inc.

Member of the Board
Fujiyo Ishiguro

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.

 

Important concurrent positions at other organization

 

- Director,Chief Evangelist, Netyear Group, Inc.

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

- Outside Director, The Shoko Chukin Bank, Ltd.

- External Director, Mitsui & Co., Ltd.

 

Member of the Board
Nobuo Domae

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.

 

Important concurrent positions at other organization

 

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

Member of the Board
Masaaki Koizumi

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.

 

Important concurrent positions at other organization

 

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

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

- Outside Director, Fan Communications, Inc.

Statutory Auditor, TSUKUI CAPITAL CORPORATION

Member of the Board
Shiho Konno

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.

 

Important concurrent positions at other organization

 

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

- Outside Director,  LIXIL Corporation

Member of the Board
Ungyong Shu

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.
 

Important concurrent positions at other organization

 

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

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

- Outside Director, Sojitz Corporation

Member of the Board
Sachiko Kuno

Independent Director,

Member of the Board

Sachiko Kuno

 

Sachiko Kuno joined Mitsubishi Kasei Institute of Life Sciences, Inc. in April 1983, and was a member of Research Development Corporation of Japan and Ueno Pharmaceutical Co. She co-founded Sucampo Pharmaceuticals, Inc. in December 1996 and served as Chairman of the Board and CEO. She has served on the Board of Trustees of Johns Hopkins University since June 2015.She assumed her current position as Director of the Company in June 2023.

 

Important concurrent positions at other organization

 

-Director , PHOENIXY Co., Ltd.

-S&R Chairman & CEO

-Director,VLP Therapeutics, Inc.

-Outside Director DeNA Co., Ltd.

Three Committees

Nominating Committee

Chair

Nobuo Domae

Independent Director,

Member of the Board

Member

Fujiyo Ishiguro

Independent Director,

Member of the Board

Member

Jun Makihara

Independent Director,

Member of the Board

Member

Sachiko Kuno

Independent Director,

Member of the Board

Member

Oki Matsumoto

Representative Executive Officer & Chairman of the Board

Compensation Committee

Chair

Jun Makihara

Independent Director,

Member of the Board

Member

Nobuo Domae

Independent Director,

Member of the Board

Member

Yuko Seimei

Representative Executive Officer & Chief Executive Officer

Audit Committee

Chair

Masaaki Koizumi

Independent Director,

Member of the Board

Member

Shiho Konno

Independent Director,

Member of the Board

Member

Ungyong Shu

Independent Director,

Member of the Board

 

 

Executive Managements

Executive Officers

Title

Name

Responsibilities

Representative Executive Officer

Chief Executive Officer

Yuko Seimei

- Overall Management

- Strategic Planning

- Financial Controls

Representative Executive Officer & Chiarman

Oki Matsumoto

- Crypto Asset Segment

- New Businesses

Executive Officer

Kiminori Kaneko

- Japan Segment

- Information Security

- Risk Management

Executive Officer

Chief Financial Officer

Takashi Oyagi

- US Segment

Executive Officer

John Bartleman

- US Segment

Executive Officer

Shoji Kuwashima

- Internal Controls

- Crisis Management

- Investment Business

- Corporate Communication

Executive Officer

Katsuki Mandai

- Japan Segment

- Asia-Pacific Segment

Executive Officer

Takuya Yamanaka

- Human Resources

Executive Officer

Naofumi Yamada

- Crypto Asset Segment

- Technology

- AI Strategy

 

 

Executive Directors

Title

Name

Senior Executive Director

Yo Nakagawa

Executive Director

Keiji Okamoto

Executive Director

Akira Inoue

Executive Director

Seiji Sakuma

Executive Director

Yuya Asamura

Executive Director

Hiroshi Aikawa

Executive Director

Seiichiro Wada

Executive Director

Yukinori Ohira

Executive Director

Yumi Nagai

Executive Director

Hiroshi Yamaguchi

Executive Director

Masayuki Okamoto

Executive Director

Akiko Kato

 

 

Expert Directors

Title

Name

Expert Director

Jesper Koll

Expert Director

Masataka Suzuki

Expert Director

Satoru Adachi

Expert Director

Nozomi Takasaki

Expert Director

Naoyuki Kainuma

Expert Director

Tetsuro Shimizu