The Ob River flows north through Siberia for over 3,300 miles to the Arctic Ocean, and is used mostly for irrigation, drinking water, hydroelectric energy, fishing, and major transportation for six months each year. The Sea of Japan lies between Japan, South Korea, North Korea and Russia, and its official name is disputed. The Sea of Okhotsk, which freezes from November to June, is bounded by the Kamchatka Peninsula and Sakhalin Island and separated from the Pacific Ocean by the Kuril Islands. The Yenisey River, the fifth longest in the world at over 3,400 miles, is an important source of hydroelectric power and widely used for oil/metal mining as it flows into