In characterizing the Japanese way of business, Hiroshi Okumura has made one of the most significant contributions to the study of economics. Following his study of the conversion of pre-war zaibatsu to post-war groups of enterprises, he worked on the role of comprehensive trading companies in these groups, the main banking system and the permanent employment system.
Это и многое другое вы найдете в книге Corporate Capitalism in Japan (Classics in the History and Development of Economics)