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Japan (Japanese: 日本 Nippon or Nihon; formally 日本国 Nippon-koku or Nihon-koku, meaning "State of Japan") is a sovereign nation in East Asia. Japan is located in North Pacific Ocean. It has population of 127 millions, the 10th-largest country by population. Japan is one of advanced country in technology and economy and is considered as a great power. Japan's capital and largest city, Tokyo, is one of most populous city in the world.