Kunashiri Island (Russian: Кунаши́р; Japanese: 国後島, Kunashiri-tō; Ainu: クナシㇼ or クナシㇽ, Kunasir), possibly meaning Black Island or Grass Island in Ainu, is the southernmost island of the Kuril Islands, which are controlled by Russia, but four of which (among them Kunashiri Island) are claimed by Japan (see Kuril Islands dispute).