日本国とアメリカ合衆国との間の相互協力及び安全保障条約
On 29 November 2012, the U.S. Senate unanimously approved an amendment to National Defense Authorization Act for Fiscal Year 2013 stating the Japanese-administered Senkaku Islands fall under the scope of a Treaty of Mutual Cooperation and Security between the United States and Japan and that the U.S. would defend Japan in the event of armed attacks.