History
March 2005 | Graduated from The University of Tokyo, Faculty of Law (LL.B.) |
April 2005 - October 2006 | The Legal Training and Research Institute of the Supreme Court of Japan |
October 2006 | Admitted to Japanese Bar (The Dai-ichi Tokyo Bar Association) |
October 2006 | Momo-o, Matsuo & Namba |
May 2011 | Master of Laws (LL.M.) at Columbia University, Law School |
September 2011 - June 2012 | Davis Polk & Wardwell LLP in New York |
2012 | Admitted to New York Bar |
June 2012 - March 2013 | Davis Polk & Wardwell LLP in Tokyo |
April 2013 | Momo-o, Matsuo & Namba |
January 2016 | Became Partner of Momo-o, Matsuo & Namba |
Publications
《English Translation of Title Only. Language of Publication is Japanese》
- No.4 of the Compact Commentaries of the Companies Act, Practices for preparing the Minutes under the Companies Act - Shareholder Meeting, Board of Directors, Board of Auditors and Committees
General Editor, April 2016, Shojihomu - The Companies Act from the standpoint of Corporate Governance, Second edition
General Editor, August 2015, Shojihomu - The Companies Act from the standpoint of Corporate Governance
General Editor, November 2014, Shojihomu - Corporate Actions Against Insider Trading by Officers and Employees
Co-author, July 2008, The Lawyers
Publications
The Companies Act from the standpoint of Corporate Governance, Second edition
- Editor
- Momo-o, Matsuo & Namba
- General Editors
- Masao Torikai, Norito Ohori, Yohei Yamada
- Publisher
- Shojihomu
- Publication date
- August 2015
The second edition based on the amended Ordinances of the Ministry of Justice and the Japanese Corporate Governance Code. The detail of the Corporate Governance Code is explained in a new chapter.

Publications
The Companies Act from the standpoint of Corporate Governance
- Editor
- Momo-o, Matsuo & Namba
- General Editors
- Masao Torikai, Norito Ohori, Yohei Yamada
- Publisher
- Shojihomu
- Publication date
- November 2014
This book addresses governance systems and the roles of corporate organs under the Companies Act amended in 2014 from the perspective of corporate governance. The book uses layperson's language and helpful graphics to allow readers to quickly grasp complicated concepts. Recent topics relating to corporate governance are also explained.

News
The following Momo-o, Matsuo & Namba attorneys have been selected for inclusion in the 2026 Edition of The Best Lawyers in Japan, the highly regarded peer-review legal publication by Best Lawyers:
"Antitrust/Competition Law" Nobuaki Mukai and Takashi Kobayashi
"Arbitration and Mediation" Junya Naito
"Corporate and Mergers and Acquisitions Law" Makoto Matsuo, Shuichi Namba and Junya Naito
"Corporate Governance and Compliance Practice" Rin Moriguchi and Yohei Yamada
"Information Technology Law" Takayuki Matsuo
"Insolvency and Reorganization Law" Shigeaki Momo-o and Junya Naito
"International Arbitration" Junya Naito and Tsuyoshi Suzuki
"Litigation" Junya Naito and Motomu Wake
"Private Equity, Private Funds and Venture Capital Law" Shuichi Namba
"Tax Law" Motomu Wake
The following Momo-o, Matsuo & Namba attorneys have been selected for inclusion in the 2025 Edition of The Best Lawyers in Japan, the highly regarded peer-review legal publication by Best Lawyers:
"Antitrust/Competition Law" Nobuaki Mukai
"Arbitration and Mediation" Junya Naito
"Corporate and Mergers and Acquisitions Law" Makoto Matsuo, Shuichi Namba and Junya Naito
"Corporate Governance and Compliance Practice" Yohei Yamada
"Insolvency and Reorganization Law" Shigeaki Momo-o and Junya Naito
"International Arbitration" Junya Naito and Tsuyoshi Suzuki
"Litigation" Junya Naito
"Private Equity, Private Funds and Venture Capital Law" Shuichi Namba
MMN co-hosted a webinar entitled “How Japanese Companies Can Monetize Their US Patents: Trends and Access to Third-Party Funding” with Quinn Emanuel Urquhart & Sullivan LLP on February 4, 2021.
Junya Naito, Koichi Nakatani, Koji Ohe, Yohei Yamada and Shinichiro Mori participated as speakers at this webinar.