Executive Team

Masato Tsumamoto
Chief Executive Officer (CEO) & Representative Director
CellSource Co., Ltd.
  • 2005
    Graduated from the Faculty of Human Development, Kobe University
  • 2005
    Joined Sumitomo Corporation
  • 2007
    Studied at Saint Petersburg State University in Russia
  • 2011
    Assigned to the Plastun office in Russia
  • 2015
    Founder/CEO & Representative Director (incumbent), CellSource Co., Ltd.

Masato Tsumamoto was born in Hyogo Prefecture in 1982. After graduating from Kobe University’s Faculty of Human Development in 2005, he joined Sumitomo Corporation the same year and handled its wood resources-related business in Russia and North America. In 2007, he was transferred to Russia to participate in a Russian language training program at Saint Petersburg State University. Subsequently, he was involved in the project to establish one of Russia’s largest wood processing factories in Plastun in the country’s Far East region. Being exposed to a wide variety of information while working on the front line in the trading business field, he focused on the possibility and necessity of medicine in a future society, and decided to switch to the field of regenerative medicine in which clinical applications had just started. He left Sumitomo Corporation when the Act on the Safety of Regenerative Medicine came into effect in 2014, and established a regenerative medicine-related business. In 2015, he founded CellSource Co., Ltd. He is committed to building a business that society truly needs.

Takeshi Amemiya
Chief Financial Officer (CFO) & Director
  • 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. (currently known as au Kabucom Securities Co., Ltd.)
  • 2017
    CFO & Director (incumbent), CellSource Co., Ltd.

Takeshi Amemiya was born in Yamanashi Prefecture in 1962. He joined ITOCHU Corporation and handled import finance after graduating from Kyoto University’s Faculty of Economics in 1986. Subsequently, he gained experience in bond trading, and was transferred to a finance subsidiary in London as a fund manager. After returning to Japan, he worked to set up an online securities business, which had not yet penetrated the Japanese stock market, and participated in establishing Japan Online Securities Co., Ltd.(currently known as au Kabucom Securities Co., Ltd.), becoming one of its founders. In 2005, he contributed to getting the company listed in the first section of the Tokyo Stock Exchange (TSE) the fastest in TSE’s history at that time, ultimately serving as its CFO for 12 years after that. Through these experiences, he found his motivation to create new markets. While looking for another challenge, he joined CellSource Co., Ltd. in 2017, impressed by the company’s philosophy. As CFO & director, he wishes to make the company grow further by utilizing his knowledge and experience.

Norio Murakami
External Director
  • 1970
    Graduated from the Faculty of Engineering, Kyoto University
  • 1970
    Joined Hitachi Denshi, Ltd. (currently known as Hitachi Kokusai Electric Inc.)
  • 2003
    President & Representative Director, Google Japan Inc. (currently known as Google Japan G.K.), and Vice-President, Google Inc. (currently known as Google LLC), in the U.S.
  • 2009
    Honorary Chairman, Google Japan
  • 2017
    External Director (Incumbent), CellSource Co., Ltd.

Norio Murakami was born in Oita Prefecture in 1947. He joined Hitachi Denshi, Ltd. to start his career as a system engineer of minicomputers after graduating from Kyoto University in 1970.

In 1978, he was transferred to Digital Equipment Corporation Japan (DEC Japan), and acquired knowledge about artificial intelligence through his involvement in MITI’s Fifth Generation Computer project. He worked at the Artificial Intelligence Technology Center at the DEC headquarters in Massachusetts, U.S., for five years from 1986. He returned to Japan in 1991, worked as a chief marketing officer, and then was appointed as president & representative director of Google Japan Inc. and vice-president of Google Inc. in the U.S. in 2003 after serving in several representative positions at Japanese subsidiaries of U.S. IT companies. He had been responsible for all operations of Google in Japan since joining the company.

In 2009, he assumed the position of honorary chairman, and on January 1, 2011, retired from Google Japan to establish the Norio Murakami Office. He aggressively conducts business activities in various fields, such as speaking at seminars and serving as a board member in different companies. He also holds a B.E. and teaches in schools.

Kumi Fujisawa
External Director
  • 1995
    Founder/President & Representative Director, IFIS Japan Ltd.
  • 2004
    Executive Director (Incumbent), the Investment Trusts Association, Japan
  • 2011
    Public Governor (incumbent), Japan Securities Dealers Association
  • 2013
    Director (incumbent), the Shizuoka Bank, Ltd.
  • 2013
    Representative Director (incumbent), Sophia Bank Ltd.
  • 2014
    Director (incumbent), Toyota Tsusho Corporation
  • 2018
    Director (incumbent), Japan Professional Football League
  • 2021
    External Director (Incumbent), CellSource Co., Ltd.

Kumi Fujisawa was born in Nara Prefecture in 1967. After graduating from Osaka City University, she worked for investment management firms both at home and abroad, and then established the first mutual fund evaluator in Japan in 1995. After selling the business to the global rating company Standard & Poor’s (currently known as S&P Global Ratings) in 1999, she joined the startup project of Sophia Bank, a thinktank, in 2000, and currently serves as the company’s representative director. She also works as an external director at some listed companies such as the Shizuoka Bank and Toyota Tsusho, besides being engaged in different public functions as a council committee member of governmental bodies, public governor of the Japan Securities Dealers Association, and director of the Japan Professional Football League. Based on her experience in implementing startup projects, she visited small-and-medium-sized companies across Japan for coverage as the newscaster of “the 21st Century Business School” aired by NHK Educational TV. Currently, she strives to educate the public on what ideal leadership should be, and how one should approach social problems through books, magazines, TV programs, and lecture sessions across Japan, in addition to her online radio program, “Kumi Fujisawa’s President Talk,” while aggressively working as a coordinator of private-public initiatives, utilizing her wide network with politicians, business leaders, and bureaucrats.

She completed a master’s program at Waseda University Graduate School of Sport Sciences in 2020.

Hirohiko Hanaki
Executive Officer/Director of Medical Compliance
  • 1991
    Graduated from the Faculty of Agriculture, Gifu University
  • 1991
    Joined NIDEK CO., LTD.
  • 2005
    Joined Japan Tissue Engineering Co., Ltd.
  • 2016
    Joined CellSource Co., Ltd.
  • 2021
    Executive Officer/ Director of Medical Compliance (incumbent), CellSource Co., Ltd.
Katsuji Onishi
Executive Officer/General Manager of Business Administration
  • 1995
    Graduated from the Department of Business Administration, Yokohama National University (YNU)
  • 1995
    Joined Nikko Securities Co., Ltd. (currently known as SMBC Nikko Securities Inc.)
  • 2001
    MBA, Department of Business Administration, Graduate School of International Social Sciences, YNU
  • 2004
    Withdrew from the doctoral program after completing the required course work at the Department of Business Administration of the Graduate School of International Social Sciences, YNU, without submitting a dissertation
  • 2008
    Joined kabu.com Securities Co., Ltd. (currently known as au Kabucom Securities Co., Ltd.)
  • 2018
    Joined CellSource Co., Ltd.
  • 2020
    Executive Officer/ General Manager of Business Administration (incumbent), CellSource Co., Ltd.
Makoto Kagayama
Executive Officer/Director of Sales Promotion
  • 2005
    Graduated from the School of Economics, Senshu University
  • 2005
    Joined Seven-Eleven Japan Co., Ltd.
  • 2005
    Joined NPO Athletic Club Machida
  • 2008
    Joined FC Machida Zelvia
  • 2010
    Joined Smith & Nephew KK
  • 2020
    Joined CellSource Co., Ltd.
  • 2021
    Executive Officer/Director of Sales Promotion (incumbent), CellSource Co., Ltd.
Hajime Wakatsuki
Executive Officer/Director of Business Development
  • 1996
    Graduated from the Faculty of Law, Chuo Gakuin University
  • 1998
    Joined the Bristol Myers Squibb Zimmer Division (currently known as Zimmer Biomet G.K.)
  • 2005
    Joined Medtronic Japan Co., Ltd.
  • 2006
    Joined Nippon Becton Dickinson Co., Ltd.
  • 2008
    Joined Biomet Japan, Inc. (currently known as Zimmer Biomet G.K.)
  • 2020
    Joined CellSource Co., Ltd.
  • 2021
    Executive Officer/Director of Business Development (incumbent), CellSource Co., Ltd.
Shinichi Sakurada
Executive Officer/General Manager of the Cell Processing Center (CPC)
  • 2005
    Graduated from the Faculty of Science and Engineering, Chuo University
  • 2007
    M.E., Graduate School of Science and Engineering, Chuo University
  • 2007
    Joined Canon Inc.
  • 2019
    M.S., J. Crayton Pruitt Family Department of Biomedical Engineering, University of Florida
  • 2020
    Joined CellSource Co., Ltd.
  • 2021
    Executive Officer/General Manager of the CPC (incumbent), CellSource Co., Ltd.
Yujiro Sugi
Executive Officer/General Manager of Financial Affairs
  • 2006
    Graduated from the School of Business Administration, Kobe University
  • 2006
    Joined Sumitomo Corporation
  • 2011
    Studied at Beijing Language and Culture University
  • 2012
    Assigned to the Shanghai office in China
  • 2021
    Executive Officer/General Manager of Financial Affairs (Incumbent), CellSource Co., Ltd.
Kimio Yamashita
Audit & Supervisory Board Member
  • 1974
    Graduated from the Faculty of Law, Kobe University
  • 1974
    Joined the Sanwa Bank, Ltd. (currently known as MUFG Bank, Ltd.)
  • 2004
    Executive Officer, Risk Control Division/Compliance Control Division, UFJ Holdings, Inc.
  • 2005
    Chairman of the Board, kabu.com Securities Co., Ltd. (currently known as au Kabucom Securities Co., Ltd.
  • 2010
    Full-time External Auditor, Yuyo Steamship Co., Ltd. (currently known as ENEOS Ocean Corporation)
  • 2010
    External Auditor, Osaka Securities Finance Co., Ltd. (currently known as Japan Securities Finance Co., Ltd.)
  • 2014
    External Auditor (Incumbent), Namura Shipbuilding Co., Ltd.
  • 2017
    Full-time Audit & Supervisory Board Member (Incumbent), CellSource Co., Ltd.
Hideo Koyama
Audit & Supervisory Board Member
  • 1977
    M.H., Graduate School of Humanities, Sophia University
  • 1992
    Director of Medical Economics Research Department, National Institute of Health Services Management
  • 2002
    Director of Department of Management Sciences, National Institute of Public Health
  • 2004
    Completed a doctoral program at the Graduate School of Health and Welfare, Kawasaki University of Medical Welfare
  • 2007
    Dean, School of Management and Information, University of Shizuoka
  • 2007
    Director, Graduate School of Management and Information, University of Shizuoka
  • 2010
    Chief Professor of the Healthcare Management Course, Graduate School of Business, University of Hyogo
  • 2018
    Specially Appointed Professor, Graduate School of Business, University of Hyogo/Professor Emeritus (Incumbent), University of Hyogo
  • 2018
    Audit & Supervisory Board Member (incumbent), CellSource Co., Ltd.
Tsuneyasu Ozaki
Audit & Supervisory Board Member
  • 1994
    Graduated from the Faculty of Law, University of Tokyo/ 48th term legal trainee, the Legal Training and Research Institute of Japan
  • 1999
    Prosecutor, Special Investigation Department, Tokyo District Public Prosecutors Office
  • 2003
    Assigned to the Administrative Litigation Division, Litigation Bureau, Ministry of Justice
  • 2004
    Deputy Director, Office of Administrative Procedure, Planning and Coordination Division, Administrative Management Bureau, Ministry of Internal Affairs and Communications
  • 2008
    LPC Partner, Nishimura & Asahi
  • 2013
    Representative (Incumbent), Fukuoka Office, Nishimura & Asahi
  • 2014
    External Auditor (Incumbent), Tosoh Corporation
  • 2016
    Chair, Governance Committee, TAKADA Corporation
  • 2019
    Audit & Supervisory Board Member (Incumbent), CellSource Co., Ltd.