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Kei Amemiya

Kei Amemiya

Shimada Hamba & OsajimaWest 18th Floor, Otemachi 1st Square1-5-1 Otemachi, Chiyoda-kuTokyoJapan100-0004

Global Leader

Competition 2020

Professional Biography

WWL Ranking: Recommended

WWL says

Kei Amemiya is singled out as "extraordinarily intelligent and revered among clients for his long-standing competition experience and insightful advice".


Kei Amemiya is a partner at Shimada Hamba & Osajima, leading its Japanese antitrust and competition practice.

Mr Amemiya, who has over 25 years of experience, previously served as investigator at the Japan Fair Trade Commission (JFTC). When he joined the JFTC, he was the first attorney to be hired under a special law to offer legal expertise in the JFTC. There, Mr Amemiya played a leading role in many of the JFTC’s model-making cases involving cartel/bid rigging, private monopolisation and unfair trade practices, and provided countless insights to the officials to develop JFTC practice.

In 2004, Mr Amemiya returned to private practice at Morrison & Foerster Tokyo. Since then, he has advised numerous clients in a wide variety of industries on every kind of antitrust issue, including precedent-making cartel and other investigations as well as internationally renowned merger reviews. He joined Shimada Hamba & Osajima in 2020 and continues to provide business-oriented advice to clients. He is also a frequent speaker on competition law issues both in Japan and abroad.

As a non-governmental adviser serving under a long-term commitment, Mr Amemiya attends and presents at various International Competition Network (ICN) conferences. He also advises JFTC and ICN committees on major issues from the private counsel perspective. He is also a senior director of the Japan Competition Law Forum.

Mr Amemiya received his LLB from Chuo University and his LLM from the University of Michigan Law School. He is admitted to practise law in Japan and the state of New York.

National Leader

WWL Ranking: Recommended
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