In October 1942, I began my undergraduate study of economics. Following the suggestion of my teacher, Professor Hideo Aoyama at the University of Kyoto, I started to read Hicks' Value and Capital. With no substantial knowledge of economics, I could read its Part I with no serious problem, but then realized that I could have understood it much more deeply if I had read a more elementary theory book. I started to read Wicksell's Lectures on Political Economy and the study of Hicks was interrupted. The study of Wicksell was also soon interrupted. I was conscripted to the Imperial Navy of Japan, December 1943, when the second year of my university life had just begun. It was only after the war ceased in 1945, that I could return to Hicks. I finished my B.Econ. studies in 1946 and was appointed a Scholarship Graduate Student and was supervised by Aoyama who assigned to me the subject of mathematization of the Value and Capital system. The work was completed in 1948 and the thesis, entitled Dogakuteki Keizai Riron (Dynamic Economic Theory, referred to as DKR below), a relevant part of which will be presented in this volume, was published in 1950.

With this encounter with General Equilibrium Theory (GET) at the very early stage of my academic life my fate was almost decided. It is no exaggeration to say that I confined myself throughout my life in the narrow realm of GET.