Karafuto 1945 Summer Hyosetsu no Mon (樺太1945年夏 氷雪の門) is a 1974 Japanese film based on the Soviet Union's invasion of Karafuto during the Soviet–Japanese War near the end of World War II. The movie is set in Maoka (present day Kholmsk), and the story is based on the deaths of nine women who worked in the postal telegraph office in the city. Twelve women worked in the office, and on August 20, 1945, nine of them committed suicide.