History
| March 2010 | Graduated from Kyoto University, Faculty of Law (LL.B.) |
| April 2010 - March 2012 | Kyoto University Law School |
| November 2012 - December 2013 | The Legal Training and Research Institute of the Supreme Court of Japan |
| December 2013 | Admitted to Japanese Bar (The Dai-ichi Tokyo Bar Association) |
| January 2014 | Momo-o, Matsuo & Namba |
| May 2019 | Master of Laws (LL.M.) at Columbia University, Law School |
| August 2019 - September 2019 | Pillsbury Winthrop Shaw Pittman LLP in New York |
| October 2019 - July 2020 | Mayer Brown LLP in New York |
| 2020 | Admitted to New York Bar |
| January 2024 | Became Partner of Momo-o, Matsuo & Namba |
News
Masayuki Inui has been promoted to partner in the firm as from January 2024.
Masao Torikai, Hirotoshi Kakumoto, Masayuki Inui, and Toshihiro Yamaguchi authored “Corporate Finance by Venture Companies (2nd edition)” published by Shojihomu (January 2022).