About

- Leadership

as of Oct. 1, 2025

Masahisa Ikeda

Masahisa Ikeda

Auditor
Managing Partner
Admitted in New York
Mayer Brown GJBJ

Profile

Masahisa Ikeda is Managing Partner, Mayer Brown GJBJ.
Masahisa has extensive experience representing global companies and government agencies, including the Ministry of Foreign Affairs of Japan, on a wide variety of matters, including cross-border acquisitions, financings and disputes.

He also represents numerous corporations on various government investigations and regulatory and compliance matters, including investigations relating to securities law, antitrust law and FCPA, before the U.S. Department of Justice, the U.S. Securities and Exchange Commission and the European Commission.
Masahisa speaks frequently on international business issues and legal issues. Masahisa is on the board of numerous non-profit organizations in the U.S. and Japan, including serving as the Asia Pacific Director of the Trilateral Commission, a Board Member of the Tokyo Foundation for Policy Research, an Auditor of the International House of Japan, Research Collaborator of the Japan Fair Trade Commission, an Executive Committee Member of the Harvard Law School Association, and a Founder and Council of UWC ISAK Japan.

Masahisa has been named a leading practitioner for capital markets, M&A and asset management by Chambers Global, Chambers Asia-Pacific, The Legal 500 Asia Pacific, IFLR 1000 and the Nihon Keizai Shimbun.