The United States dropped the atomic bomb on Hiroshima on August 6, 1945 and on Nagasaki on August 9, 1945. Emperor Hirohito instructed the Japanese people to surrender on Aug … ust 15, 1945 - nine days after the first bomb, and six days after the second bomb.Answered. In Japan in WW2.heir emperor would not accept defeat and their people would fight to the death. They were not afraid and even after the bombs were dropped they didn't surrender. The Japanese surrender because of the Soviet's threat to attck them.