Awards
Kosuke Hamaguchi
Partner
Tokyo Office
- Languages
- Japanese, English
- Qualifications
- 2006, Japan (Dai-Ichi Tokyo Bar Association)
Kosuke Hamaguchi’s practice mainly involves public and private M&A transactions and corporate governance. He also regularly advises clients on corporate crisis management. Based upon his experiences overseas, he represents international companies in numerous cross-border projects. In particular, he is recognized for his expertise in strategic M&A transactions and alliances.
Practice Areas
Education/Professional Experience
- 2001
- The University of Tokyo (LL.B.)
- 2003
- The University of Tokyo (LL.M.)
- 2006 -
- Nagashima Ohno & Tsunematsu
- 2012
- University of Virginia School of Law (LL.M.)
- 2012 - 2013
- Sullivan & Cromwell LLP, New York
- 2013 - 2014
- Nagashima Ohno & Tsunematsu NY LLP
- 2016 - 2018
- Adjunct Lecturer (Civil Law), The University of Tokyo
- 2017 - present
- Partner, Nagashima Ohno & Tsunematsu
Awards
Seminars
-
September 25, 2025 (Thu) 11:00 - 12:00Future Outlook for M&A Targeting Listed Companies in Japan in light of Public M&A Rules in Major Foreign Jurisdictions
- Shuichi Nishimura
- Kosuke Hamaguchi
Online (Live & On-Demand)
- M&A
- Mergers & Acquisitions
-
May 29, 2024 (Wed) 14:30 - 17:45Exploring the Frontiers of Economic Security with Takayuki Kobayashi, Member of the House of Representatives and Legislative Official: Overview of the Security Clearance System (Act on the Protection and Use of Critical Economic and Security Information) and its Impact on Corporate Practices
- Takayuki Kobayashi (member of the House of Representatives)
JP TOWER Hall & Conference
- Corporate
- Corporate Governance
- General Corporate
-
February 27, 2024 (Tue) - December 27, 2024 (Fri) 16:00“Management Challenges in the Economic Security Era”: Part 3 – “Investment Regulations and Restructuring Chinese Business”
- Ryo Okubo
- Kosuke Hamaguchi
- Haseru Roku
Online (On-Demand)
- Corporate
- Corporate Governance
- General Corporate
-
February 9, 2024 (Fri) 15:00 - 16:30Management Issues and Practical Considerations related to Listed Subsidiaries
- Kosuke Hamaguchi
- Kyohei Mizukoshi
- Katsunori Shirozu
Online (Live & On-Demand)
- Corporate
- Corporate Governance
- General Corporate
Publications
-
Articles
Chambers Global Practice Guides Corporate Governance 2025 Japan – Law & Practice
(June 2025)
Hiroshi Mitoma, Tomohiko Iwasaki, Kosuke Hamaguchi (Co-author)
- Corporate
- Corporate Governance
-
Articles
Chambers Global Practice Guides Corporate Governance 2024 Japan – Law & Practice
(June 2024)
Hiroshi Mitoma, Tomohiko Iwasaki, Kosuke Hamaguchi (Co-author)
- Corporate
- Corporate Governance
-
Articles
Chambers Global Practice Guides Corporate Governance 2023 Japan – Law & Practice
(June 2023)
Hiroshi Mitoma, Tomohiko Iwasaki, Kosuke Hamaguchi (Co-author)
- Corporate
- Corporate Governance
-
Articles
Regulatory Issues and Hurdles for M&A in Japan
(May 2023)
Kosuke Hamaguchi, Ryohei Tanaka (Co-author)
- M&A
- Mergers & Acquisitions
Featured Topics
Topics
-
Announcements
Now Available: “Foreign Direct Investment Regulations and the Practice thereof – Given the Recent Economic and Security Environment,” the Second Part of a Two-Part Round-Table Discussion
-
Announcements
Now Available: “Foreign Direct Investment Regulations and the Practice thereof – Given the Recent Economic and Security Environment,” the First Part of a Two-Part Round-Table Discussion
-
Announcements
NO&T sponsored the Legal 500 event “GC Summit Japan 2022”
