Iturup

Iturup, also historically known by other names, is an island in the Kuril Archipelago separating the Sea of Okhotsk from the North Pacific Ocean. The town of Kurilsk, administrative center of Kurilsky District, is located roughly midway along its western shore. Iturup is the largest and northernmost of the southern Kurils, ownership of which is disputed by Japan and Russia. It is located between Kunashiri 19 km to its southwest and Urup 37 km to its northeast. The Vries Strait between Iturup and Urup forms the Miyabe Line dividing the predominant plants of the Kurils.

The native inhabitants of the islands since at least the 14th century were the Ainu. Various European explorers passed the area over the years but settlement varied between Russian and Japanese. The island was formally claimed as Japanese territory in 1855.