Research Briefing
The US-Japan Security Treaty and the East China Sea
During a three day visit to Tokyo in late April 2014, US President Barack Obama confirmed that the islands in the East China Sea known as Senkaku by Japan and Diaoyu by China are covered by 1960 US-Japan Security Treaty, under which the US has pledged to come to Japan’s defence if its territory is attacked. Some observers have argued that Obama’s statements mark the first time a US president has clearly taken Japan’s side over islands. However, President Obama stressed that this was "not a new position". His remarks come at a time of growing Japanese nervousness about the state of its longstanding alliance with the US.