The Ural River is a major river in western Russia that flows into the Caspian Sea. The Amur River is a major river in eastern Russia and northern China that flows into the Sea of Okhotsk. The Indus River is a major river in South Asia that flows through Pakistan and India before emptying into the Arabian Sea. The EAST River is a major river in EAST Asia that flows through China, North Korea, and South Korea before emptying into the Yellow Sea. All four rivers are located in Asia and are important sources of water for the region.