__ The Pacific War was a part of World War II. Japan started the war with Pearl Harbor Attack on 8th December, 1945, and fought against United States of America, Great Britain, Australia, Nederland and so on. Before the war, Japan Imperial Army had been invading China for many years. But the war on Chinese main land had become soured year by year and raised international condemnations. In order to break through the situation and grab the resources in Southeast Asia and Pacific region, Japan started another desparate war.

__ As shown in the figure, Japan had occupied very huge area in Asia and pacific region at the early stage of the war. But after the defeat in the battle of Midway in 1942, Japan had just pullbacked the front line. In 1945, Japan's main land became targets of air bombings by the US planes from Sipan and Tinian Islands.