The project aims to contribute to the fields of Foreign Policy Analysis and International Security by tackling the under-researched relationship between recent changes in Japanese domestic policy institutions and Japan’s diplomatic and security practice. The project focuses on the “presidentialization” of Japan’s decision-making system, a subject that has substantial importance to understand foreign policy and bilateral relations of contemporary Japan. The project seeks to investigate the changing nature of the relationship linking political leadership and military officials, key strategists and bureaucratic personnel. The project’s hypothesis is that the actors and factors shaping Japanese foreign and defense policy are changing and widening. Within this context, this project focuses in particular on the growing impact of the Kantei, the Prime Minister’s Office.