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Koichi Inoue


(T) +81.3.6800.1816
(F) +81.3.5401.2725


  • Cornell University (LL.M. 1988); The Legal Training and Research Institute of the Supreme Court of Japan (Graduate 1984); Tokyo University (LL.B. 1982)

Bar Admissions

  • Japan (Daini Tokyo Bar Association) and New York

Koichi Inoue has practiced in the field of international transactions, investments, and dispute resolutions, with primary emphasis on Japanese tax law for more than 30 years. His tax experience covers analysis and advice to a wide range of clients in relation to their commercial transactions and restructurings. Koichi also represents taxpayers in complicated administrative proceedings and tax litigation.

Koichi advises multinational companies on complex tax issues in transactions involving multiple jurisdictions and helps plan and implement the restructuring of their global operations in a tax-efficient manner. His experience spans a variety of industries, including pharmaceuticals, telecommunications, manufacturing, real estate development, software industries, private equities, and reinsurance companies. Koichi's recent engagements include tax consultation for PAG Asia I LP in connection with the sale of its 25 percent interest in Universal Studios Japan to Comcast for $2.3 billion.

Koichi is listed as Band 1 (Japan, tax: domestic) in Chambers Asia-Pacific and one of Tier 1 leading individuals (Japan, tax) in The Legal 500 Asia Pacific. He is also named in The Best Lawyers in Japan for tax and Who's Who Legal: Corporate Tax. Koichi regularly writes and lectures on tax and related subjects. He is a coauthor of Tax Aspects of Transactions with Foreign Corporations (5th ed. 2013) and The Interrelation between Tax Treaties and Domestic Tax Law (2nd ed. 2011). Koichi also has served as a lecturer at Aoyama Business Law Graduate School.

Honors & Distinctions

  • Named in Chambers Asia-Pacific (2011-2019), The Legal 500 Asia Pacific (2015-2018), and The Best Lawyers in Japan (2009-2018) for tax

    Co-winner of the 36th Academic Award by The Japanese Institute of Certified Public Accountants (2008)

    Co-winner of the 30th Research Award by the Japan Tax Research Institute (2007)


English, Japanese
Koichi Inoue