- Chuo University (LL.B.)
- Hitotsubashi University Law School (J.D.)
Passed Bar exam.
The Legal Training and Research Institute of the Supreme Court of Japan
- Registered as an attorney (Dai-ichi Tokyo Bar Association)
- Tsuyoshi Dai & Partners
- "Copyrightability of industrial design –the Tripp Trapp chair case and subsequent cases–” in LES (Licensing Executives Society International) Japan News VOL.58 No.4, (December 2017)