Iturup Island is part of the Kuril Islands chain in the Russian Far East. The island is disputed between Russia and Japan, with Russia currently having control over the island. There are several settlements on Iturup Island, including the largest city called Kurilsk. Kurilsk is the administrative center of the island and is located on the eastern coast. It has a population of around 1,700 people and serves as a hub for transportation, commerce, and administration on Iturup Island.