Japan, Sea of, or East Sea, an arm of the Pacific Ocean. It lies between the islands of Japan and the Asiatic mainland (Korea and eastern Siberia). In the south, it is connected with the East China Sea by the Korea Strait. In the north, the Tsugaru Strait connects it with the Pacific, and La Pérouse (or Soya) Strait and the Tatar Strait connect it with the Sea of Okhotsk. The Sea of Japan has an area of about 390,000 square miles (1,010,000km2).
Early explorers drove flags into the ground to claim territories. But no one bothered to float a flag in the oceans. For the most part, we peaceably shared the oceans until we realized what valuable goods could be found in their dark and murky depths.
Russia, or Russian Federation, a country of eastern Europe and northern and eastern Asia.