Kosuke Tsunashima

Kosuke Tsunashima


Kosuke Tsunashima has represented and acted for both Japanese and non-Japanese clients in various industries in litigation and other forms of dispute resolution involving M&A and joint venture transactions, finance projects, real property, product liabilities, construction, disclosure documents, intellectual properties and other commercial disputes.
Kosuke Tsunashima also has broad and deep experience in a wide range of corporate matters, including M&A and joint venture transactions in Japan and around the world. He has assisted a number of overseas clients investing into Japan, including in relation to setting up a Japanese branch or subsidiary, advising on various regulatory issues and drafting all types of contracts required for their business in Japan.

Tsunashima Kosuke

Practice Areas

Practice Groups

  • Dispute Resolution Group
  • Corporate Crisis Management Practice Group
  • Corporate Transaction Group
  • Asia and Emerging Countries Practice Group


2008 Keio University (LL.B)
2008 - 2009 The Legal Training and Research Institute of the Supreme Court of Japan
Aug 2014 - May 2015 Graduate study, University of California, Los Angeles School of Law (LL.M)
Sep 2015 - Sep 2016 Associated with Corrs Chambers Westgarth, Melbourne
Oct - Dec 2016 Associated with Corrs Chambers Westgarth, Sydney


Professional Admissions

  • Japan (2009)
  • New York (2017)

Professional and Academic Associations

  • Daini Tokyo Bar Association


  • Japanese (first language)
  • English