Russia borders three oceans, and over thirteen marginal seas. Russia's major islands and archipelagos include Novaya Zemlya, Franz Josef Land, Severnaya Zemlya, the New Siberian Islands, Wrangel Island, the Kuril Islands, and Sakhalin. The Diomede Islands, administred by Russia and the United States, are just  apart; and Kunashir Island in the extreme southeast of Russia is just  from Hokkaido, Japan.