China has told the United States to butt out of a territorial dispute with Japan in the East China Sea after Washington warned that a military claim by Beijing to airspace in the region raises the risk of "misunderstanding and miscalculations." The creation of an "Air Defense Identification Zone" by China comes amid increasing tensions between Beijing and Tokyo over competing claims to disputed islands in the sea, which are believed to be situated near large reserves of natural resources. China's announcement Saturday of the zone, which it described as an early-warning system for self-defense, drew a swift response from the United States, Japan's closest military ally.
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The Japanese Prime Minister says he is "extremely concerned" by China's move
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China released a map and coordinates that identify its "Air Defense Identification Zone"
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The zone includes islands at the center of a dispute between Beijing and Tokyo
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The U.S. has said the Chinese announcement creates "risks of an incident"
It declared that aircraft in the area must report their flight plans to @placeholder, maintain two-way radio and clearly mark their nationalities on the aircraft.