Japan summoned the Chinese ambassador early on Thursday to express concern after a Chinese navy ship sailed close to what Japan considers its territorial waters in the East China Sea for the first time, increasing tensions over the disputed area.
As part of its wider military build up along the Japanese archipelagos in the East China Sea, Japan activates a new radar station on the island of Yonaguni that is close to the disputed Senkaku Islands. 2016-03-28 (Context: China-Japan relations, East China Sea, Japan, Senkaku Islands dispute)
China delimits an "air-defence identification zone" over an area of the East China Sea, covering Diaoyu-Senkaku Islands, also claimed by Japan. 2013-11-23 (Context: China, East China Sea, Japan, Senkaku Islands)
Japan reports that two Chinese ships have entered territorial waters off the coast of the disputed Senkaku Islands. 2013-09-19 (Context: China, Japan, Senkaku Islands, Senkaku Islands dispute)
Japan scrambles fighter jets in response to a Chinese plane seen near the disputed Senkaku Islands, marking the first time aircraft are involved in the dispute. 2012-12-13 (Context: China, Japan, Senkaku Islands, Senkaku Islands dispute)
Japan lodges a formal protest with China after the presence of the latter's patrol boats near the disputed Senkaku Islands. 2012-07-11 (Context: China, Japan, Senkaku Islands, Senkaku Islands dispute)