What are some key event and changes in Japan from 1920 through 1940

The Japanese economy of the 1920s suffered from a retrenchment after the boom of the First World War. For most of the decade, the real economy remained dull, with low economic growth, mild deflation, and an unsettled financial system.With fall of France in 1940, Japan moves to occupy French Indo-China. 1941 - Japan launches a surprise attack on US Pacific fleet at Pearl Harbor, Hawaii. ... 1945 - US planes drop two atomic bombs on Hiroshima and Nagasaki in August. Emperor Hirohito surrenders and relinquishes divine status.

He made the polygraph too,but thomas edison was not falsely credited for the light buld