Air Defense Identification Zone (East China Sea)

The East China Sea Air Defense Identification Zone (abbreviated ADIZ) is an Air Defense Identification Zone covering most of the East China Sea where the People's Republic of China announced that it was introducing new air traffic restrictions in November 2013. The area consists of the airspace from about, and including, the Japanese controlled Senkaku Islands (which are known as the Diaoyu Islands in mainland China and are claimed by mainland China as well as Taiwan) north to South Korean-claimed Socotra Rock (known as Suyan Jiao in China). About half of the area overlaps with a Japanese ADIZ, while also overlapping to a small extent with the South Korean and Taiwanese ADIZ. When introduced the Chinese initiative was controversial as requirements were imposed that other countries with air defense identification zones do not impose and it included contested maritime areas. Critics said the move escalated the Senkaku Islands dispute between China and Japan.

The first ADIZ was established by the United States in 1950 when it created a joint North American ADIZ with Canada, citing the legal right of a nation to establish reasonable conditions of entry into its territory. The U.S. does not apply its ADIZ procedures to foreign aircraft not intending to enter U.S. airspace and does not recognize the right of a coastal nation to apply its ADIZ procedures to foreign aircraft not intending to enter their national airspace.

South Korea's ADIZ was established in 1951 during the Korean War by the United States Air Force. It currently does not cover Socotra Rock, known to Koreans as Ieodo. Korean Defence Minister Kim Kwan-jin said that South Korea would consider extending its ADIZ in light of the extent of the Chinese ADIZ but an announcement of a change was postponed after a meeting with the United States ambassador.

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