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.
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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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.
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.
They have been hurt by a territorial dispute between Beijing and Japan over a group of islands in the East China Sea.
"These negotiations are about the protection of maritime resources in the East China Sea, " Japan's Chief Cabinet Secretary Yoshihide Suga said on Wednesday.
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Ties between Tokyo and Beijing are currently very strained over a row about ownership of islands both claim in the East China Sea.
"China hopes that Japan take effective measures to stop stirring up tension in the East China Sea and making irresponsible remarks, " it said.
Chinese maritime and aerial probing in the disputed territory in the East China Sea has escalated security concerns and also damaged economic relations.
New Prime Minister Shinzo Abe wants to expand U.S.-Japanese security ties, and Washington can help defend Japan's interests in the East China Sea.
Media in China have welcomed Washington's low-key public stance on the East China Sea territorial dispute during Japanese Prime Minister Shinzo Abe's US visit.
Mr Minami said an ongoing territorial dispute with China over islands is the East China Sea was also a cause for concern going forward.
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In the southern Japanese town of Yatsushiro, not far from the East China Sea, Chikashi Matsunaga is helping lead a quiet revolution in Japan's agriculture.
About half of all US troops based in Japan are stationed in Okinawa, which lies south of Japan's main islands in the East China Sea.
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