Strait of Tartary (Gulf of Tartary, Gulf of Tatary, Tatar Strait, Tartar Strait, Strait of Tartar, also Russian: Татарский пролив, Chinese: 韃靼海峽; pinyin: Dádá hǎixiá, and Mamiya Strait (Japanese: 間宮海峡, Hepburn: Mamiya kaikyō)) is a strait in the Pacific Ocean dividing the Russian island of Sakhalin from mainland Asia (South-East Russia), connecting the Sea of Okhotsk on the north with the Sea of Japan on the south.