The Japanese coastguard reported yesterday that four Chinese marine surveillance ships sailed within 12 nautical miles of the Japanese-controlled islands, known in Japan as Senkaku and in China as Diaoyu. The Japanese foreign ministry issued a formal protest to the Chinese embassy in Tokyo. The alleged intrusion was the first this year and the 21st since Tokyo “nationalised” the islands in
September, provoking sharp protests from China.
On Saturday, the Japanese military scrambled fighter jets to head off a Chinese civilian surveillance plane that was apparently heading toward the islets. According to Japanese officials, the Chinese aircraft did not enter what Japan considers its airspace. It is the second such episode—on December 13, eight Japanese F-15 fighters were dispatched to intercept a Chinese plane.
The Senkaku/Diaoyu islands are not the only source of tension. On December 29, the Japanese coastguard detained a Chinese fishing vessel that had entered the 200-nautical mile exclusive economic zone around the southern Japanese island of Yasushima. The captain and two crew members were taken to Kagoshima city, on Kyushu, for questioning before being released.
In September 2010, Japan detained the captain of a Chinese fishing vessel after an alleged collision with a Japanese coastguard vessel in waters off the Senkaku/Diaoyu islands and threatened to put him on trial. The arrest rapidly evolved into a tense standoff, in which China threatened to cut off exports of vital rare earths to Japan. The dispute was only resolved when Japanese authorities released the captain.


