Choai Hada, attorney-at-law
・Member, Tokyo Bar Association (since 2010）
・NPB certified agent
・Member, Japan Sports Law Association
・Member, USC SBA Sports Analytics Group
| July 1984 | Born in Honjo City, Saitama Prefecture |
| March 2003 | Waseda University Honjo Senior High School |
| March 2006 | Waseda University (Skipped 4th year) |
| March 2009 | Waseda Law School |
| September 2009 | Japanese Bar Exam |
| December 2010 | Admitted in Japan (Tokyo Bar Association) |
| May 2019 | Admitted NPB certified agent |
| August 2019 | HADA Expert Agency Inc. CEO |
| December 20221 | USC Gould School of Law LL.M. |
| March 2022 | Founded HADA Law Office |
| April 2022 | Harvard Business School Online Negotiation Mastery |