With one of the largest legal teams in Japan, we bring a wealth of practical knowledge focused on the singular purpose of providing high quality legal services.


Our lawyers have authored or co-authored a number of newsletters, articles, books and other materials covering a wide range of legal areas to address the latest legal developments and increasingly diverse and complex issues.


We regularly hold seminars and offer lectures through various formats, such as online streaming.


Ryo Okubo

Ryo Okubo

Partner (NO&T NY LLP)/Co-Head of Office

New York Office

Ryo Okubo

Ryo Okubo

Partner (NO&T NY LLP)/Co-Head of Office

New York Office





Ryo Okubo

Ryo Okubo is a Co-Head of Nagashima Ohno & Tsunematsu NY LLP. His main areas of practice are M&A, private equity, acquisition finance, technology, space law, financial regulations and other complicated corporate transactions. He has extensive experience in cross-border transactions between Japan and U.S. and other jurisdictions.
He graduated with an LL.B. from the University of Tokyo in 1999 and with an LL.M. from The University of Chicago Law School in 2006. He worked at Ropes & Gray LLP in Boston and New York from 2006 to 2008. He has also been a member of contracts supervisory committee of Japan Aerospace Exploration Agency (JAXA) since 2010 and a part-time lecturer (civil law) at the legal department of the University of Tokyo from 2014 to 2015.

The University of Tokyo (LL.B.)
2000 -
Nagashima Ohno & Tsunematsu
The University of Chicago Law School (LL.M.)
2006 - 2007
Ropes & Gray LLP, Boston
2007 - 2008
Ropes & Gray LLP, New York
2010 - 2017
Partner, Nagashima Ohno & Tsunematsu
2010 - present
Member of Contracts Supervisory Committee, Japan Aerospace Exploration Agency (JAXA)
2014 - 2015
Adjunct Lecturer (Civil law), The University of Tokyo
2017 - present
Partner and Co-Head of Nagashima Ohno & Tsunematsu NY LLP
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