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..
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 was a part-time lecturer (civil law) at the legal department of the University of Tokyo from 2014 to 2015.

He has received many awards. In M&A/PE space, he was recognized as “Japan Corporate/M&A: USA expertise based abroad” and “USA Corporate/M&A: Foreign expert for Japan” by Chambers Global 2025 and a notable practitioner in private equity by IFLR 1000 2024, and ranked 6th in economic securities/international trade of Nikkei Newspaper’s Best Performing Lawyers Ranking 2024, as selected by companies and 6th in M&A of Nikkei Newspaper’s Best Performing Lawyers Ranking 2023, as selected by companies. In TMT space, he was recognized as one of four Japanese lawyers in ALB Asia Super 50 TMT Lawyers 2025 and leading partner in TMT in Japan by The Legal 500 Asia Pacific 2025.