Japan is an island nation in East Asia comprising a stratovolcanic archipelago extending along the Pacific coast of Asia. Measured from the geographic coordinate system, Japan is 36° north of the equator and 138° east of the Prime Meridian. The country is southeast of the Russian Far East, separated by the Sea of Okhotsk; slightly east of Korea, separated by the Sea of Japan; and east-northeast of China and Taiwan, separated by the East China Sea. The closest neighboring country to Japan is the Russian Federation.