Political map of Northern Asia. Northern Asia or North Asia is generally considered to be the land east of Russia. The Caucasus, are often, though not always, part of this definition. Much of Northern Asia was influenced by Russia through colonialism. If Russia is included in Northern Asia - it is often not - then Moscow is the largest city. North Asia is bordered to the north by the Arctic Ocean, to the west by Eastern Europe, to the south by Central and East Asia and to the east by the Pacific Ocean and North America. North Asia covers an area of approximately 13,100,000 square kilometres (5,100,000 sq mi) or 8.8% of the earth's land area, or 1.5 times the size of Brazil .