This collection provides significant insight into the events between First World War victory and Second World War defeat, crucial to understanding the political journey of Japan during this period. Topics covered include ultra-nationalism and the Japanese agenda of imperial dominance in the Far East, employment and social conditions in a time of global economic instability, and the Great Kanto Earthquake of 1923 which flattened Tokyo. These documents record relations with Axis Powers in the context of changing alliances, the deterioration of relations with the Allies as World War Two reached the Pacific, and American post-war occupation of Japan.