大湊警備府
At the time of the attack on Pearl Harbor on 7 December 1941, "Okikaze" was based at the Ōminato Guard District in northern Japan, and was assigned to patrols of the Tsugaru Strait and the coastline of southern Hokkaidō. In April 1942, "Okikaze" was recalled to the Yokosuka Naval District, where it was assigned anti-submarine patrols of the entrance of Tokyo Bay for the duration of the war, making only an occasional convoy escort run along the coast of Japan to Kushimoto, Wakayama or patrols of the coast of northern Honshū through the end of 1942.