History
| March 2014 | Kobe University, Faculty of Law (LL.B.) |
| March 2016 | Kyoto University Law School (J.D.) |
| November 2016 - December 2017 | The Legal Training and Research Institute of the Supreme Court of Japan |
| December 2017 | Admitted to Japanese Bar (The Dai-ichi Tokyo Bar Association) |
| December 2017 - February 2020 | Nagashima Ohno & Tsunematsu |
| February 2020 - Present | Momo-o, Matsuo & Namba |
| May 2024 | New York University, School of Law (LL.M. in Corporate Law) |
| August 2024 - July 2025 | Winston & Strawn LLP (New York Office) |
| January 2025 | Admitted to New York Bar |
Activities and others
2018-Present: Member, Environmental Protection Committee in Dai-ichi Tokyo Bar Association
2018-2022: Member, Organizing Committee, Inter-Pacific Bar Association 31st Annual Meeting and Conference (IPBA 2021 Tokyo)
2022: Lecturer, National Tax College, National Tax Agency (Commercial and Corporate Law Seminar)
2025-Present: Outside Corporate Auditor, SUPWAT Co., Ltd.
2026: Arbitrator, 19th Japan Vis Pre-Moot hosted by the Academy for International Business Transactions
Publications
《English Translation of Title Only. Language of Publication is Japanese》
- Legal system of Renewable Energy, co-authorship, Keiso Shobo publishing Co., Ltd. (2022) in Japanese
- Legal practice for sustainable regional revitalization and the conservation and utilization of mountain and sea in the countryside, co-authorship, Keiso Shobo publishing Co., Ltd. (2021) in Japanese
News
Naoki Nihonmatsu served as an arbitrator at the 19th Vis Japan Pre-moot, hosted by the Academy for International Business Transactions, on March 7, 2026.
In the February 2022 issue of Japan Business Law Review, published on December 21, 2021, Shuichi Namba, Takashi Kobayashi, Takayuki Matsuo and Naoki Nihonmatsu authored an article on personal data protection act and data related legal service.
Naoki Nihonmatsu joined the firm as associate on February 25, 2020.