Executive Team

Masayuki Yamakawa
Representative Director and CEO
  • 1989
    B.M., Faculty of Medicine, Tottori University
  • 1993
    Founded Seishin Plastic and Aesthetic Surgery Clinic Co., Ltd. (Retired)
  • 2007
    Founded THE CLINIC Tokyo (Retired)
  • 2015
    Founded SerialIncubate Co., Ltd. (Incumbent Representative Director)
    Founded CellSource Co., Ltd. (Retired)
  • 2016
    Founded Tokyo Knee Osteoarthritis Clinic (Retired)
  • 2022
    Director, CellSource Co., Ltd.
  • 2024
    Chairman of the Board, CellSource Co., Ltd.
  • 2025
    Representative Chairman of the Board, CellSource Co., Ltd.
  • 2025
    Representative Director and CEO (Incumbent), CellSource Co., Ltd.
Tomohiro Iga
Director and CFO
  • 1994
    Graduated from the Faculty of Commerce and Management, Hitotsubashi University
  • 1994
    Joined The Long-Term Credit Bank of Japan, Limited(currently known as SBI Shinsei Bank, Limited)
  • 2003
    Joined Kiacon Corporation
  • 2005
    Joined Revamp Corporation
  • 2014
    Joined Fourth Valley Concierge Corporation
  • 2017
    Director, Fourth Valley Concierge Corporation
  • 2021
    Joined amana inc.
  • 2023
    Director and CFO, amana inc.
  • 2024
    Joined CellSource Co., Ltd
  • 2024
    Executive Officer and General Manager of Corporate Division, CellSource Co., Ltd.
  • 2026
    Director and CFO, General Manager of Corporate Division (incumbent), CellSource Co., Ltd.
Takeshi Amemiya
Director (Full-time Audit & Supervisory Committee Member)
  • 1986
    Graduated from the Faculty of Economics, Kyoto University
  • 1986
    Joined ITOCHU Corporation
  • 1999
    Joined Japan Online Securities Co., Ltd.
  • 2008
    CFO & Executive Director, kabu.com Securities Co., Ltd. (Mitsubishi UFJ e-Smart Securities Co., Ltd.)
  • 2017
    CFO & Director, CellSource Co., Ltd.
  • 2023
    Director (Full-time Audit & Supervisory Committee Member) (Incumbent), CellSource Co., Ltd.
Tsuneyasu Ozaki
External Director (Audit & Supervisory Committee Member)
  • 1994
    The Legal Training and Research Institute of Japan
  • 1996
    Public Prosecutor Appointment
  • 1997
    Fukuoka District Public Prosecutors Office
  • 1999
    Special Investigation Department, Tokyo District Public Prosecutors Office
  • 2003
    Administrative Litigation Division, Litigation Bureau, Ministry of Justice
  • 2004
    Office of Administrative Procedure, Planning and Coordination Division, Administrative Management Bureau, Ministry of Internal Affairs and Communications
  • 2005
    Resignation from the Prosecutors Office/Attorney Registration
  • 2008
    Partner, Nishimura & Asahi (now Nishimura & Asahi, Foreign Law Joint Enterprise)
  • 2014
    External Auditor (Incumbent), Tosoh Corporation
  • 2019
    Audit & Supervisory Board Member, CellSource Co., Ltd.
  • 2023
    External Director (Audit & Supervisory Committee Member) (Incumbent), CellSource Co., Ltd.
  • 2025
    OZAKI BUSINESS LAW OFFICE Attorney at Law (Incumbent)
Yoshitake Kamino
External Director (Audit & Supervisory Committee Member)
  • 1992
    Graduated from the Faculty of Letters, Hokkaido University
  • 1995
    Joined Chuo Audit Corporation
  • 1999
    Registered as a Certified Public Accountant
  • 2007
    Joined Ernst & Young ShinNihon (currently Ernst & Young ShinNihon LLC)
  • 2011
    Representative (Incumbent), Kamino Certified Public Accountant Office
    Registered as a Certified Public Tax Accountant
  • 2012
    Representative Partner (Incumbent), Aoyama Access Tax Corporation
  • 2016
    External Corporate Auditor (Incumbent), No.1 Co., Ltd.
  • 2017
    External Corporate Auditor (Incumbent), Energy Product Co., Ltd.
  • 2024
    External Corporate Auditor (Incumbent), JU Gifu Hashima Auto Auction Co., Ltd.
  • 2025
    External Corporate Auditor (Incumbent), Lightworks Corporation
  • 2026
    Outside Director (Audit and Supervisory Committee Member) (Incumbent), CellSource Co., Ltd.