Modern Japan Since 1945 On September 2, 1945 the Japanese surrender. They had lost the war because United States drop two atomic bombs. The place where it drops the atomic bombs was Hiroshima and Nagasaki. The total estimate of casualties in Nagasaki was 40,000 people dead and Hiroshima casualties were 20,000 to 100,000 people dead from the atomic blast. When the Japan surrender, all they’re military was crippled since they might build up an additional force to expand. Also Japan has to pick four important islands and give the rest to their rightful owner. On 1946 the leader of the Allies, Douglas MacArthur and his advisers draft a new Japanese constitution which the govern