Pertinent to the draft corporate governance code's reference to a division between monitoring and execution, and always insightful, is Professor Bob Garratt's work to define the role of boards, and the difference between managing and directiing.
Bob Garratt – Directing vs Managing
http://bdti.mastertree.jp/f/mn5fgtqc
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.