**FILE** The survey ship Koyo Maru (left), chartered by Tokyo city officials, sails around Minamikojima (foreground), Kitakojima (middle right) and Uotsuri (background) — the tiny islands in the East China Sea called Senkaku in Japanese and Diaoyu in Chinese — on Sept. 2, 2012. (Associated Press/Kyodo News)

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**FILE** The survey ship Koyo Maru (left), chartered by Tokyo city officials, sails around Minamikojima (foreground), Kitakojima (middle right) and Uotsuri (background) — the tiny islands in the East China Sea called Senkaku in Japanese and Diaoyu in Chinese — on Sept. 2, 2012. (Associated Press/Kyodo News)