History
| March 2009 | Graduated from The University of Tokyo, Faculty of Law (LL.B.) |
| April 2009 - August 2010 | The Legal Training and Research Institute of the Supreme Court of Japan |
| August 2010 | Admitted to Japanese Bar (The Dai-ichi Tokyo Bar Association) |
| August 2010 | Momo-o, Matsuo & Namba |
| May 2016 | Master of Laws (LL.M.) at Columbia University, Law School (Harlan Fiske Stone Scholar) |
| August 2016 - June 2017 | Weil, Gotshal & Manges LLP in New York |
| 2017 | Admitted to New York Bar |
| July 2017 | Momo-o, Matsuo & Namba |
| January 2020 | Became Partner of Momo-o, Matsuo & Namba |
Publications
《English Translation of Title Only. Language of Publication is Japanese》
- Practice Manual for Petition of Corporate Bankruptcy (2nd Edition)
Co-author, Seirin Shoin (2020) - Legal Affairs regarding Finance by Venture Companies
General Editor, Shojihomu (2019)
News
Masao Torikai, Hirotoshi Kakumoto, Masayuki Inui, and Toshihiro Yamaguchi authored “Corporate Finance by Venture Companies (2nd edition)” published by Shojihomu (January 2022).
Hirotoshi Kakumoto have co-authored the book, "Practice Manual for Petition of Corporate Bankruptcy (2nd Edition)", issue of Seirin Shoin.
Hirotoshi Kakumoto has been promoted to partner in the firm as from January 2020.