But because the US unilaterally gave the Ryukyu Islands to Japan, and because rich petroleum resources have been discovered in the seas around Diaoyutai, Japan has claimed sover eignty over Diaoyutai.
只因美國私自將琉球群島交予日本，又加上釣魚台海域被發現有豐富石油礦藏，日本乃提出對釣魚台的主權主張。