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Masahisa Mitsunaga

Masahisa Mitsunaga



  • Japan Practice
  • Corporate Law
  • Intellectual Property Law

WSG Practice Industries


California, U.S.A.


Masahisa (Masa) Mitsunaga is a Shareholder in the Los Angeles office of Buchalter.  He is Chair of the Japan Practice group and a member of the Firm’s Corporate and Intellectual Property groups.

His clients see Mr. Mitsunaga as a solution provider, and he has represented numerous Japanese clients in connection with their challenging legal matters including large business and strategic transactions and business disputes in the United States for over a decade.  In the early stage of his professional career, Mr. Mitsunaga developed particular experience in the entertainment industry by participating in media-related merger and acquisition and debt and equity finance transactions as well as handling litigation matters for clients within the industry.  Since he joined Buchalter, Mr. Mitsunaga has regularly represented a wide range of Japanese clients through their start-ups, capital transactions, and mergers and acquisitions in the United States.

Mr. Mitsunaga’s clients include media and broadcasting companies, film production and distribution companies, talent management companies, interactive game developers, private equity funds, advertising companies, logistics companies, toy and game manufacturers, food manufacturers, medical device manufacturers, real estate companies, online service providers, and other companies operating globally.

Bar Admissions

  • California
  • New York


  • USC Gould School of Law
  • Keio University, Tokyo, Japan
Areas of Practice

???????? | Corporate Law | Intellectual Property Law | Japan Practice

Professional Career

Significant Accomplishments

  • Represented a major Japanese medical device manufacturer in connection with its strategic transaction to expand its presence in the United States.
  • Represented a major Japanese trading company in connection with its investment into a Hollywood incubator.*
  • Represented Colony Capital in the $660 million purchase of Miramax Films from Disney.*
  • Represented a major Japanese private equity fund in connection with a business dispute that arose from its investment in the United States and successfully resolved the dispute.
  • Represented Japanese producers, rights holders, and financiers in connection with their motion picture deals in Hollywood.
  • Represented numerous Japanese clients in connection with license deals, merchandise deals, joint venture deals, and other U.S. operations.
  • Represented a major Japanese broadcasting company in a copyright infringement action against a major U.S. network, including handling e-discovery and other pretrial matters.*

*Represents experience from a previous law firm


  • I.P. Strategies for the Content Business — from U.S. litigation perspectives
  • Hollywood Accounting & Vertical Integration — Lesson from case law
  • Lessons by Japanese and U.S. Lawyers re E-Discovery
  • Points that Japanese licensors should be aware

WSG's members are independent firms and are not affiliated in the joint practice of professional services. Each member exercises its own individual judgments on all client matters.

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