• March, 1993
    Graduated from Keio University, LL.B.
  • October, 1995
    Passed National Bar Examination in Japan
  • April, 1996
    The Legal Training and Research Institute of the Supreme Court of Japan (50thgraduating class)
  • April, 1998
    Admitted in Japan (Dai-Ni Tokyo Bar Association)Joined Ushijima Law Office (present: Ushijima & Partners)
  • January, 2001
    Established Field-R Offices as a co-founder partner
  • August, 2008
    Established VASCO DA GAMA OFFICES as a co-founder partner
  • March, 2011
    Became a director and executive officer of COOKPAD, Inc. (COO from March, 2012 until December, 2014)
  • July, 2015
    Bacame a Managing director and CEO of Minnano Wedding Co., Ltd. (until October, 2018)
  • August, 2019
    Director of Kashima Antlers FC.
  • July, 2021
    Chairman of the Board of Directors of HyAS & Co. Inc.

Practice Areas

Law Practice

  • Entertainment Law
  • Sports Law
  • Media Law
  • Internet Law
  • License Law (including Character License, Corporate License)
  • Finance Law
  • International Law
  • Corporate Law
  • Litigation


  • Media Relations
  • Risk Management / PR
  • Internet Media Matters
  • Sports Management

Titles and Memberships



  • Steering committee member of Japan Professional Baseball Players Association (2004-2018)
  • Arbitrator of Japan Sports Arbitration Agency
  • A council for the screening and scrutinizing process of National budget organized by Government Revitalization Unit (2009)
  • Member of the contract compliance committee at the request of Urban Renaissance Agency (2010)
  • Member of the investigative commission on Urban Renaissance Agency (2010)
  • A council for the screening and scrutinizing business of independent administrative agency organized by Government Revitalization Unit (2010)
  • A council for the screening and scrutinizing process of budget of Takamatsu city (2010/8/1)
  • A council for the screening and scrutinizing process of budget of Osaka city (2010/8/22-23)

Publications and Journal Articles

Journal Articles

and more


  • “The Implementation and History of Professional Baseball Agent” (symposium planned by Operation Control Committee of Nagoya Bar Association, 2001)
  • “Japanese Professional Sports: Actual Condition and the Rule of Law” (BBL seminar planned by Research Institute of Economy, Trade and Industry, 2002)
  • “The Course for Sports Related License” (Sports Management School-Tokyo University Undou-kai, Doushisha University, Chukyo University, Ritsumeikan University and Tama University 2003-present)
  • “Law and Practice of Entertainment Fund” (Keizai seminar, 2004)
  • “Sports Business: Challenge to the New Age” (Keizai seminar, 2005)