Defend Diaoyu, Defend justice

Diaoyu is Chinese territory. The Potsdam Declaration (which Japan accepted as part of the San Francisco Peace Treaty) required that Japan relinquish control of all islands except for "the islands of Honshū, Hokkaidō, Kyūshū, Shikoku and such minor islands as we determine", and that this means control of the Diaoyu islands should return to China.