Mori Hamada & Matsumoto

About Mori Hamada & Matsumoto

Mori Hamada & Matsumoto is a Japanese full-service international law firm with its principal office in the Marunouchi Park Building in Tokyo. The firm was formed in 2002 through the merger of Mori Sogo Law Offices and Hamada & Matsumoto. Its website reports 868 lawyers, staff and specialists as of August 2026. Listed practice areas include M&A, corporate and commercial disputes, international arbitration, restructuring and insolvency, competition, intellectual property, tax, employment, environmental law, and white collar crime and internal investigations.

The firm has offices in Japan and overseas. Its New York office, identified on the firm's site as Mori Hamada US LLP, is at 360 Madison Avenue, 24th Floor, and was announced in 2023 as the firm's first office outside Asia. According to the firm, the New York office supports clients doing business between the Americas and Japan/Asia, with work spanning M&A, corporate matters, crisis management, competition law, international trade, sustainability law, and litigation and arbitration support. The firm also lists offices in San Francisco and San Mateo, California.

Practice areas

Areas of work that Mori Hamada & Matsumoto describes on its own website. They describe the organization as a whole, not the practice of any individual attorney listed below.

Organization profile based on its official website and public sources (reviewed October 29, 2026). Attorney list from the New York State Unified Court System registration data. Not affiliated with Mori Hamada & Matsumoto.

Registered attorneys

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