Political map of East Asia and the Western Pacific 02 September 1945 (Occupation of Japan): US forces arrived in Tokyo in late August to accept the formal Japanese surrender and begin the occupation of Japan. Meanwhile, the Soviets completed their conquest of Manchuria, Sakhalin and the Kuril Islands (Soviet-Japanese War (1945)). In Korea they approached the 38th parallel north, a line chosen by the Americans to temporarily demarcate their occupation zones (Division of Korea).