Kunashir island of the South Kuril Islands (Chishima).Pictured: coast defence line of Kunashir island built by Soviet army ; entrenched tank turrent of IS-3 tank. Kunashir (Japanese: 国後島 Kunashiri ) is the southernmost island of the Kuril Islands / Chishima and Kunashir is visible from the nearby Japanese island of Hokkaidō from which it is separated by the Nemuro Strait. .