Iturup island of the South Kuril Islands (Chishima).Pictured: Rybaki fishing village of Iturup island.View of Bogdan Khmelnitsky Volcano in the background. Iturup (Ainu: エトゥオロプシリ ; Japanese: 択捉島 ) is the largest island of the South Kuril Islands. It is the northernmost island in the southern Kuril/Chishima.