In characterising the Japanese way of business, Professor 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 roll of comprehensive trading companies in these groups, the main banking system and the permanent employment system. - However, he is very critical of this way of business, whereas those influenced by him are enthusiastic in its appreciation. - This is the first English translation of his work.