 After the establishment of the Soviet Union, some Japanese communists settled in Russia; for example, Mutsuo Hakamada, the brother of Japanese Communist Party chairman Satomi Hakamada, escaped from Japan in 1938 and went to Russia, where he married a local woman.His daughter Irina later went into politics after the collapse of the Soviet Union.After the end of the Russo-Japanese War in 1905 with the Treaty of Portsmouth, the southern half of Sakhalin officially became Japanese territory, and was renamed as Karafuto, prompting an influx of Japanese settlers there.