Shintaro Yamada
Director, Representative Executive Officer and CEO
Fumiaki Koizumi
Director, President / CEO of Kashima Antlers F.C. Co., Ltd.
Sayaka Eda
Director, Executive Officer, Senior Vice President of Corporate, and Chief Financial Officer
Mayumi Tochinoki
Director
Makiko Shinoda
Outside Director
Masayuki Watanabe
Outside Director
Takuya Kitagawa
Outside Director
Daiken Tsunoda
Outside Director
Kazuhiko Toyama
Outside Director
Fumiyuki Fukushima
Outside Director
Shintaro Yamada
Director, Representative Executive Officer and 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. He also established the YAMADA Shintaro D&I Foundation in July 2021.
Fumiaki Koizumi
Fumiaki Koizumi
Director, President / 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 tech 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, Fumiaki 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, and as Director, President in September 2019. He also assumed the role of CEO of Kashima Antlers F.C. Co., Ltd. in August 2019.
Shintaro Yamada
Sayaka Eda
Sayaka Eda
Director, Executive Officer, Senior Vice President of Corporate, and Chief Financial Officer
Sayaka Eda completed her pre-doctoral course (master’s degree) at the Graduate School of Science and Engineering from Keio University Graduate School. In April 2006, she joined Goldman Sachs Japan Co., Ltd. After joining the company, she was engaged in investment/loan projects that utilize their own funds, etc., and was appointed as a Managing Director at the same company in 2017 based on her extensive financial knowledge outside of corporate finance. Outside of her work, she also serves as the Co-Chair of the Japan Women’s Network and leads the promotion of D&I. Sayaka joined Mercari, Inc. as CFO in January 2021. In January 2023, she assumed the position of Senior Vice President of Corporate and CFO. She has been in her current position of Director, Executive Officer, Senior Vice President of Corporate, CFO since September 2023.
Fumiaki Koizumi
Mayumi Tochinoki
Mayumi Tochinoki
Director
After graduating from Montclair State College in the US, Mayumi Tochinoki worked in account auditing, internal auditing, and compliance at accounting firms and foreign-based financial institutions. As the head of the internal auditing department at US investment bank JP Morgan, Mayumi not only was involved in internal auditing for all of JP Morgan’s offices in Japan, but also served as head of the group’s Asia region Compliance Testing Group. After serving as Chief Administrative Officer and compliance officer for S&P Global Ratings Japan, she joined Mercari in January 2019. She first served as the head of the Internal Audit Office before becoming an Audit and Supervisory Board member for Mercari and Merpay in September 2019. She took on additional duties as Audit and Supervisory Board member for Mercoin in April 2021. In September 2023, she was appointed Director.
Sayaka Eda
Makiko Shinoda
Makiko Shinoda
Outside Director
After graduating from Keio University, Makiko Shinoda 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. She is also a member of the Ministry of Economy, Trade and Industry’s Study Group Toward Achieving Human Capital Management.
Mayumi Tochinoki
Masayuki Watanabe
Masayuki Watanabe
Outside Director
After graduating from Kyoto University’s Faculty of Integrated Human Studies, Masayuki Watanabe joined McKinsey & Company, Inc. He was later involved in the founding of DeNA Co., Ltd. in 1999. After working on business strategy, marketing, and new business development, he left the company in 2010. He traveled to the UK alone, founding the educational service Quipper Ltd. in London. As CEO of Quipper, he saw his company come to offer educational services in countries around the world, including Japan, the US, and other locations in Asia. He sold Quipper to Recruit Co., Ltd. in 2015. In 2019, he co-founded FOODCODE, Ltd. and was appointed Director for the company. Since that time, he has served as Outside Director for numerous startups.
Makiko Shinoda
Takuya Kitagawa
Takuya Kitagawa
Outside Director
Takuya Kitagawa has a bachelor’s degree in Mathematics and Physics from Harvard College and a Ph.D. in Physics from Harvard University. In 2012, he joined Rakuten, Inc. (currently Rakuten Group, Inc.). In 2019, he assumed the position of Managing Executive Officer, Chief Data Officer of Rakuten Group, where he led AI/data strategy, research, and execution, as well as oversaw five overseas offices, including in India and the US. He currently serves as President and Director of QuEra Computing and Co-founder and Director of Public Interest Incorporated Association Well-being for Planet Earth.
Masayuki Watanabe
Daiken Tsunoda
Daiken Tsunoda
Outside Director
After graduating from the University of Tokyo’s Faculty of Law, Daiken Tsunoda joined Mori Sogo (currently Mori Hamada & Matsumoto). Following this, he founded Nakamura & Tsunoda (currently Nakamura, Tsunoda & Matsumoto). He then went on to serve as outside officer for a number of companies, including as Outside Audit and Supervisory Board Member of Mercari starting in September 2021. In April 2023, he established Daiken Tsunoda Law Office.
Takuya Kitagawa
Kazuhiko Toyama
Kazuhiko Toyama
Outside Director
After graduating from the University of Tokyo’s Faculty of Law, Kazuhiko Toyama received his MBA from Stanford University before passing the bar examination. He joined Boston Consulting Group, then held the positions of Representative Director of Corporate Direction Inc. and Representative Director and COO of Industrial Revitalization Corporation of Japan. He established Industrial Growth Platform, Inc. (IGPI) in 2007, where he was involved in supporting management reform and growth for many companies before becoming Chairman of IGPI Group in October 2020. He also serves as Chairman of General Incorporated Association Japan Association of Corporate Directors.
Daiken Tsunoda
Fumiyuki Fukushima
Fumiyuki Fukushima
Outside Director
After graduating from Chuo University’s Faculty of Law, Fumiyuki Fukushima passed the CPA Examination. In 2006, he joined KPMG AZSA & Co. (currently KPMG AZSA LLC). He assumed the position of standing Outside Audit and Supervisory Board member of Mercari, Inc. in September 2014, and Audit and Supervisory Board member of Kashima Antlers F.C. Co., Ltd. in May 2022. He has also served as Outside Director (Audit and Supervisory Committee Member) of Chatwork Co., Ltd. since March 2023.
Kazuhiko Toyama