Shintaro Yamada
Representative Director, CEO
Fumiaki Koizumi
Director, President (Chairman of the Board) / CEO of Kashima Antlers F.C. Co., Ltd.
Ken Takayama
Outside Director (Independent Director)
Masashi Namatame
Outside Director (Independent Director)
Makiko Shinoda
Outside Director (Independent Director)
Shintaro Yamada
Representative Director, CEO
After graduating from Waseda University, Shintaro Yamada established Unoh Inc., where he launched various internet services including "Movie Life," "Photozou," and "Machitsuku!". In 2010, he sold Unoh to Zynga. After leaving Zynga in 2012, he went on a trip around the world. In February 2013, he established Mercari, Inc.
Fumiaki Koizumi
Fumiaki Koizumi
Director, President (Chairman of the Board) / CEO of Kashima Antlers F.C. Co., Ltd.
After graduating from Waseda University, Fumiaki Koizumi joined Daiwa Securities SMBC, where he managed the IPOs of IT companies including mixi, Inc. and DeNA Co., Ltd. In 2006, he joined mixi, Inc. as Director, Executive Officer, and CFO, and supervised the Corporate Division. After leaving mixi in 2012, Koizumi supported a number of startup companies. In December 2013, he joined Mercari, Inc., where he assumed the role of Director in March 2014. He was appointed as President & COO in April 2017.
Shintaro Yamada
Ken Takayama
Ken Takayama
Outside Director (Independent Director)
After graduating from the Hitotsubashi University, he joined the Industrial Bank of Japan where he worked at the Shinjuku and other branches to later enter a graduate course in Business Administration at the University of Texas. After returning to Japan, he worked for five years providing M&A advisory services and joined Rakuten in 1999, where he worked on the company’s IPO in 2000. He also took part in Rakuten’s overall management activities as CFO until leaving the company in 2013. He has been working as Outside Director for numerous startups since 2014.
Fumiaki Koizumi
Masashi Namatame
Masashi Namatame
Outside Director (Independent Director)
In 1988, he joined the Long-Term Credit Bank of Japan. Namatame worked for KPMG starting in 1998, and at the same time for the Financial Supervisory Agency (currently Financial Services Agency). Since 2000, he led initiatives for financial institutions such as M&A, capital raising, and IPOs at Deutsche Securities and Morgan Stanley’s investment banking headquarters. He joined Visa Worldwide Japan in 2012, and BlackRock Japan in 2015, where he was a member of the Board of Directors, and responsible for the Corporate Planning and the Strategic Business departments. In 2018, he joined Tokio Marine Holdings and was appointed Managing Executive Officer, Group Chief Digital Officer in 2021. He also assumed the role of Outside Director at Mercari in 2018.
Ken Takayama
Makiko Shinoda
Makiko Shinoda
Outside Director (Independent Director)
After graduating from Keio University, she joined the Long-Term Credit Bank of Japan (currently Shinsei Bank). She received an MBA from the Wharton School of the University of Pennsylvania, and an M.A in International Relations from Johns Hopkins University, to later work as a management consultant at McKinsey & Company. Later, she worked for Novartis and Nestlé to create and execute their business plans, build their internal management system, and lead the PMI. She joined Hobonichi in 2008, and contributed to their IPO as CFO, Director & Manager-Administration. She left the company in 2018 to recharge, and joined YeLL’s Board of Directors in March 2020.
Masashi Namatame