• Aug 22, 2025 showa 1926 1939 a history of japan showa a histor nd military build-up indicated an inevitable slide toward broader conflict. Key Events and Turning Points (1926–1939) 1926: Emperor Hirohito ascends; Showa era begins amid political uncertainty. 1928: Japan adopts a more assertive foreign policy, albeit constrained by international treaties. 1931: M By Eugene Hyatt
