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Key Facts about East China Sea

Jan. 31, 2026

China’s coast guard patrolled Japan-administered islands in the East China Sea almost daily last year, it said recently.

About East China Sea:

  • It is a marginal sea of the Western Pacific Ocean, located in East Asia.
  • It extends northeastward from the South China Sea, to which it is connected by the shallow Taiwan Strait between Taiwan and mainland China.
  • The Korea Strait connects it to the Sea of Japan.
  • To the north, the East China Sea opens up into the Yellow Sea.
  • The East China Sea and the South China Sea together form the China Sea.
  • The countries which border the sea include South Korea, Japan, the Republic of China (Taiwan), and the People’s Republic of China.
  • Rivers: The Yellow River (Huanghe) and the Yangtze River (Changjiang) discharge into the East China Sea.
  • Weather in the region is dominated by the monsoon winds.
  • The region is influenced by the Tsushima and Kuroshio Currents as well as by a strong upwelling area northeast of Taiwan.
  • Islands: The sea contains several islands, with the most significant being the Ryukyu Islands, which are part of Japan, and the Senkaku/Diaoyu Islands.
    • China, Taiwan, and Japan all claim sovereignty over the Senkaku islands, which are under Japanese administration.

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