LAWYER PROFILE
Ryo Okubo

Ryo Okubo

Global 2026

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Nagashima Ohno & Tsunematsu
 Nagashima Ohno & Tsunematsu

Ranked in 1 practice area

Corporate/M&A

USA

2 years ranked

Corporate/M&A

Japan

2 years ranked

Contributions and articles

3 Global Practice Guides

About

Provided by Nagashima Ohno & Tsunematsu

Practice Areas

Ryo Okubo is a Co-Head of Nagashima Ohno & Tsunematsu NY LLP. His main areas of practice are M&A, private equity, acquisition finance, space law, technology, financial regulations, real estate transactions, and economic securities. He has extensive experience in cross-border transactions, particularly between Japan and U.S.

Career

2000 -Nagashima Ohno & Tsunematsu

2006 - 2007 Ropes & Gray LLP, Boston (secondee)

2007 - 2008 Ropes & Gray LLP, New York (secondee)

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

Education

The University of Tokyo

LL.B.

1999

The University of Chicago Law School (LL.M.)

LL.M.

2005 - 2006

Awards

ALB Asia Super 50 TMT Lawyers 2025

ALB

2025

Chambers Review

Provided by Chambers

Chambers Global Guide

Corporate/M&A - Japan

Japan, expertise based abroad in USA
Individual Editorial

Ryo Okubo is co-head of Nagashima Ohno & Tsunematsu's New York office and frequently advises on cross-border transactions between Japan and the USA.

View expertise based abroad table

Corporate/M&A - USA

Foreign expert in Japan
Individual Editorial

Ryo Okubo serves as head of the firm's New York office. He specializes in advising on M&A transactions involving US and Japanese entities.

View foreign expertise table

Strengths

Provided by Chambers

  • Ryo Okubo has an overall view of transactions and is easy to consult with about business matters.

    Corporate/M&AChambers Global Guide

Ranked Individuals at Nagashima Ohno & Tsunematsu (30)

Japan

All Contributions (3)

Provided by Nagashima Ohno & Tsunematsu

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