Japan summons China's ambassador, Cheng Yonghua, to Tokyo after a People's Liberation Army Navy warship sailed close to its territorial waters near the disputed Senkaku Islands in the East China Sea for the first time.
Japan says it will keep a close watch over the disputed Senkaku Islands after Chinese ships are seen near the islands for 65 days in a row. Chief Cabinet Secretary Yoshihide Suga says that Japan has protested to China over the issue and that it would respond "calmly and firmly".
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. [https:--www.reuters.com-article-us-japan-china-eastchinasea-idUSKCN0WT0QZ (Reuters)]China–Japan relations
The cabinet of Prime Minister of Japan Shinzo Abe approves a record defence budget with a plan to buy surveillance aircraft and Lockheed Martin F-35 Lightning II fighter jets to improve security of uninhabited islands in the East China Sea claimed by both Japan and China.
Japan and Taiwan sign an agreement over fishing rights around the Senkaku Islands. China voices "extreme concerns" over the deal. [https:--www.bbc.co.uk-news-world-asia-china-22092853 (BBC)] [http:--www3.nhk.or.jp-nhkworld-english-news-20130410_36.html (NHK World)]date=August 2019
Japanese Defense Minister Itsunori Onodera states that the country has lodged a protest with China after a People's Liberation Army Navy frigate directed weapon-targeting radar at a Japanese Maritime Self-Defense Force destroyer near the disputed Senkaku Islands.
Thousands demonstrate against Chinese President Hu Jintao's visit, against the background of a dispute between Japan and China over islands in the East China Sea, condemning “Chinese imperialism” while waving the flags Tibet, East Turkestan and south Mongolia.