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Born in Kyushu and raised in the Tokyo area of Japan, Tadashi Tahara is an integral member of the firm’s Japan practice, representing Japanese corporations and their U.S. subsidiaries throughout North America in all stages of business. He is bilingual in Japanese and English, and his understanding of Japanese business and culture is invaluable to the firm’s clients.

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Tadashi’s corporate practice experience focuses on cross-border and domestic business transactions, including due diligence in mergers and acquisitions, financing agreements, and developing share purchase and shareholders agreements. As a member of the firm’s Commercial, Competition & Trade practice, he works on a myriad of commercial transactions, including sales representative and distributorship relationships involving the development, manufacture, and sale of goods, services, and technology, manufacturing and supply arrangements, warehousing and OEM agreements, and equipment leases.

Prior to joining Masuda Funai, Tadashi spent about 6 years as an associate attorney at a law firm in Tokyo, Japan, and he was a legal intern for The United Nations High Commissioner for Refugees Representation in Japan, and the Ministry of Foreign Affairs in Japan.

Practice Areas


  • Columbia Law School (New York, NY), LL.M., Harlan Fiske Stone Scholar, 2021
  • The Legal Training and Research Institute of the Supreme Court of Japan, Japan, 2014
  • The University of Tokyo, School of Law (Tokyo, Japan), J.D., 2013
  • The University of Tokyo, Bachelor of Liberal Arts, 2010


  • Illinois
  • New York


  • Japanese


American Bar Association
Professional Activities
Co-Authored "A Practical Guide to Reviewing U.S. Nondisclosure Agreements" - Business Houmu Magazine, October 2023
Masuda Funai's George Kobayashi and Tadashi Tahara Collaborate on Insightful Article for Business Houmu Magazine
Masuda Funai’s George Kobayashi (President) and Tadashi Tahara (Associate) have co-authored the compelling article "A Practical Guide to…
Tadashi Tahara Admitted to Practice Law in Illinois
Tadashi Tahara, an associate of Masuda, Funai, Eifert & Mitchell Ltd., has been formally admitted to practice law in the State of Illinois…