Karafuto Prefecture
During the 1930s and early 1940s, De-Kastri became the location of a naval outpost to protect against the Japanese, who until the end of World War II possessed the southern half of Sakhalin as Karafuto Prefecture. During the war, the bay sheltered Russian naval ships. The military installations were abandoned after the war, as the whole of the island of Sakhalin reverted to Russian control.