evidence: Karafuto became a territory of the Empire of Japan in 1905 after the Russo-Japanese War, when the portion of Sakhalin south of 50°N was ceded from the Russian Empire in the Treaty of Portsmouth. Karafuto was established in 1907 as an external territory, until being upgraded to an "Inner Land" of the Japanese metropole in 1943. Ōtomari (Korsakov) was the capital of Karafuto from 1905 to 1908 and Toyohara (Yuzhno-Sakhalinsk) from 1908 to 1945. [...] Step by step Karafuto lost its Japanese identity. Sakhalin Oblast was created in February 1946, and by March all towns, villages and streets were given Russian names. More and more colonists began to arrive from mainland Russia, with whom the Japanese were obliged to share the limited stock of housing. In October 1946 the Soviets began to repatriate all remaining Japanese. By 1950 most had been sent, willing or not, to Hokkaidō. They had to leave all of their possessions behind, including any currency, Russian or Japanese. Today some keep alive the memory of their former home in the meetings of the Karafuto Renmei, an association for former Karafuto residents.