- Born in 1954 in Osaka, Japan
- Professor at Keio University Law School since 2004
- Part-time professor at Waseda University since 2003
- Graduated from Doshisha University Faculty of Law in 1977
- Graduated Doshisha University School of Law in 1981
- Graduated from Knox College (Illinois, U.S.A.) with a BA cum laude in 1982
- Completed the Kyoto University Graduate School of Law doctoral program in 1984
- Awarded the degree of DEA de droit privé from l’Université de Paris I in 1987
- Gained the LL.D. from Kyoto University in 1996
- Formerly professor at Himeji-Dokkyo University, and Hosei University.
- Visiting professor at l’École Normale Supérieure de Paris (2006), l’Université de Paris II (2008, 2017, 2018), Sciences-po (2018)
