Background

• The Diaoyu archipelago (known as the Senkakus in Japanese) is an uninhabited chain of islands in the East China Sea claimed by China, Taiwan and Japan.
• In recent years, the increased presence of Japanese and Chinese vessels in nearby waters has heightened concerns about possible clashes between the two countries.
• The archipelago has been controlled by Japan since 1895.

Why in News?

• Japan recently dismissed China’s claim over disputed Senkaku islands and criticized China saying the claim breaks international law. 
• Last month, a new legislation allowed China’s coast guard to use weapons in waters it considers to be under its jurisdiction. This raised the concerns in Japan.

Reference:

1. http://newsonair.com/News?title=Japan-dismisses-Chinese-claims-over-Senkaku-Islands%2c-empowers-its-coastguard-to-use-weapons&id=410955