Japan has appointed a high-quality panel to advise on the core principles of its corporate governance code. The panel include an experienced foreign board member, Scott Callon, and severalcorporate governance advocates. As well, Mats Isakkson from the OECD will serve as an advisor.
http://www.fsa.go.jp/en/refer/councils/corporategovernance/01.pdf
The Board Director Training Institute (BDTI) is a "public interest" nonprofit in Japan dedicated to training about directorship, corporate governance, and related management techniques. It is certified by the Japanese government to conduct these activities as a regulated nonprofit. Read a summary about BDTI here, and see a menu of its services for both corporations and investors here.