Abstract
The conventional historical research on Japanese diplomacy during Pre - War Showa seems to have focused on competitive relations between the Army and the Ministry of Foreign Affairs. Analyzing each diplopat's vision of foreign policy has tended to be neglected. As for the period when the Army increased its influence on Japan's policy making, the attitudes of the Foreign Ministry were regarded as "International Cooperationism" as a whole, just because they were opposed to the Army's expansionism. I wonder if it is proper to refer to their ideas of foreign policy as "International Cooperationism". With this question in mind, I would like to take up, in particular, Mamoru Shigemitsu among the leading diplomats during Pre - War Showa. My main concern is to probe into his own ideas of foreign policy and to condiser his historical estimation. This thesis aims to shed light on his ideas of foreign policy and diplomacy during his years as ambassador to England, (October, 1938 - June, 1941).
