AlQa'dah 2, 1433, Sep 18, 2012, SPA - At least two of 11 Chinese ocean surveillance and fishery patrol ships sailing near East China Sea islets claimed by both Tokyo and Beijing have entered what Japan considers its territory, public broadcast NHK said on Tuesday, quoting Japan's Coast Guard. Anti-Japan protests have broken out in cities across China, triggered by the dispute over the islands, called Senkaku in Japan and Diaoyu in China, believed to be in waters rich in natural gas, according to a report of Reuters.