Karafuto Prefecture

Karafuto Prefecture (樺太庁, Karafuto-chō?), commonly called South Sakhalin, was the Japanese administrative division corresponding to Japanese territory on Sakhalin from 1905 to 1945. Through the Treaty of Portsmouth, the portion of Sakhalin south of 50°N became a colony of Japan in 1905. In 1907 the prefecture of Karafuto was established, with its capital at Ōtomari (大泊, now Korsakov) in 1905 and later Toyohara (豊原, now Yuzhno-Sakhalinsk) in 1907. In 1945, with the defeat of Japan in World War II, the Japanese administration in Karafuto ceased to function, and since 1951, the southern part of Sakhalin has been a part of Russia.