Justices of the Supreme Court

KUSANO, Koichi
Date of Birth: March 22, 1955

image:KUSANO Koichi



Graduated from the University of Tokyo, Faculty of Law in 1978


Appointed as a legal apprentice in 1978

Professional Career:

Registered as an attorney (Dai-ichi Tokyo Bar Association)
Received LL.M., Harvard Law School
Corporate Auditor, Koito Manufacturing Co., Ltd.
Director, Rakuten, Inc.
Visiting Professor, Business Law Center, University of Tokyo
Graduate Schools for Law and Politics
Lecturer, Kyoto University Law School
Visiting Professor, University of Tokyo Graduate Schools for Law and Politics
Professor, Keio University Law School
Visiting Professor, Harvard Law School
Received Ph.D.(in Laws),University of Tokyo
February 13, 2019 Justice of the Supreme Court

Motto, hobbies, etc.

Things to keep in Mind as a Justice

If laws and regulations are interpreted differently, people will behave differently, and if people behave differently, the state of the society will be different. With this in mind, I will endeavour to fulfil my duties with the utmost effort in order to create an affluent, fair and tolerant society through appropriate interpretation of laws and regulations.

Favorite Word or Term

Thus far, I have made it my philosophy of life to “learn every day, reflect upon myself every day, and thereby keep improving myself.” I hope I will keep following this path for years to come.

Books that Left an Impression on Me

I have read so many books thus far. As for my favourite books, I can nominate Kaoru Shoji’s novels (particularly, Sayonara Kaiketsu Kurozukin (Goodbye Kaiketsu Kurozukin)), Shuichi Kato’s essays (particularly, Hitsuji no Uta (A Sheep’s Song)), Ryotaro Shiba’s novels(particularly, Saka no Ue no Kumo (Clouds above the Hill))and Haruki Murakami’s novels (particularly, Noruuei no Mori (Norwegian Wood )).


I do various things in my free time, and the thing I like most is studying. In my younger days, I didn’t like studying so much, but with the advance of age, I have come to enjoy studying. In my 50s, I studied mathematics and economics with great enthusiasm, and after turning sixty, I have kept studying French while lamenting a decline in memory. I also like studying history, and lately I often read books on the modern history of England and France and books on Japanese medieval history.