The trouble starts with the names: the Sea of Japan is the East Sea to South Korea, and the East Sea of Korea to Pyongyang.
Further, the U.S. and the U.S.S.R. drew battle lines dividing Asia, across the East Sea, through Korea's 38th Parallel and the Taiwan Strait, and along Vietnam's 17th Parallel and the Mekong river.
North Korea said the rocket would fly south, likely over open waters of the Yellow Sea and East China Sea.
In terms of the Western Pacific, we are present in the South China Sea and East China Sea and elsewhere on a very routine basis.
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The deal was a coup for China, which had shifted its military focus away from a potential Soviet land invasion, and now wanted to defend territorial claims over Taiwan and parts of the South China Sea and East China Sea.
Influenced by the writings of Fernand Braudel and Immanuel Wallerstein (historians who helped establish a tradition of global comparative history), large numbers of Japanese intellectuals are beginning to realise that a global economic system existed in the areas around the Indian Ocean, the Arabic Sea, the South China Sea, and the East China Sea long before the westernisation of the world.
While Japan has been focused on its territorial dispute with China, Thursday's scramble against Russia was a reminder that the northern part of the Sea of Japan facing Russia can be as tense as the East China Sea to the south.
The two nations have been arguing over control of uninhabited islands in the East China Sea.
China and South Korea are at odds over a part of the East China sea.
Tokyo and Beijing have been at loggerheads over a group of disputed islands in the East China Sea.
The radar incident happened near a group of islands in the East China Sea which both countries claim.
Japan is currently embroiled in a separate territorial dispute with Beijing over islands in the East China Sea.
Much more worrying for Tokyo is China's push to claim disputed East China Sea islands, our correspondent adds.
Talking about tension, lets not forget China and Japan and the East China sea Island dispute.
Onto the coastal borders: the Taiwan Straits, the Bohai Bay, the East China Sea and the South China Sea.
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China and Japan disagree over who owns islands in the East China Sea.
Beijing also offered help to its neighbor acrosss from the East China Sea.
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In addition to North Korea's missile program, he cited China's intrusions into territorial waters around contested East China Sea islands.
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On the bitter row with China over disputed islands in the East China Sea, he said US support was key.
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Mr Abe is currently facing an escalation in a separate dispute with China over islands in the East China Sea.
Officials said the Washington is deployed in the East China Sea and the Stennis is in the South China Sea.
China Daily and Southern Metropolis Daily highlight how Fu Ying blamed Japan for escalating an East China Sea islands dispute.
On September 7, the captain collided with and may have rammed two Japanese patrol vessels in disputed waters in the East China Sea.
Chinese consumers like Japanese technology, but feel strongly about the territorial dispute that is playing out in the East China Sea.
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China has called off a scheduled round of talks with Japan over the exploitation of gasfields under the East China Sea.
Since last summer, Japan has been embroiled in a rancorous dispute with China over a group of small East China Sea islands.
Since last summer, Japan has been embroiled in a bitter dispute with China over a group of small East China Sea islands.
They have been hurt by a territorial dispute between Beijing and Japan over a group of islands in the East China Sea.
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