Japan 1931 - 1990 Humanities CD By eileenyoon Jan 1, 1931 Took control of Manchuria Dec 7, 1941 Japan Bombed Pearl Harbor in Hawaii Aug 6, 1945 U.S. drop atomic bomb in Hiroshima couple days later, bomb dropped in Nagasaki Sep 1, 1951 Japan and U.S. sign treaty Jan 1, 1991 Japan helped financially in the Perisan War