Iturup, known in Japan as Etorofu, is the largest of the Kuril Islands separating the Sea of Okhotsk from the North Pacific Ocean. It is the largest and northernmost of the southern Kurils, ownership
"Staten Eylant" between Hokkaido ("Eso") and the imaginary continent of "Companies Land" on Jan Janssonius's 1654 New and Accurate Description of Japan, the Land of Eso, and Adjacent Islands