**FILE** A Chinese submarine rescue ship sails in waters off the island of Yonaguni in Japan's Okinawa prefecture on Oct. 16, 2012. Japanese aircraft spotted seven Chinese warships in waters off the southern Japan island and about 200 kilometers (125 miles) from the uninhabited isles at the center of a territorial dispute between the two countries. (Associated Press/Joint Staff Office of Japan)

**FILE** A Chinese submarine rescue ship sails in waters off the island of Yonaguni in Japan's Okinawa prefecture on Oct. 16, 2012. Japanese aircraft spotted seven Chinese warships in waters off the southern Japan island and about 200 kilometers (125 miles) from the uninhabited isles at the center of a territorial dispute between the two countries. (Associated Press/Joint Staff Office of Japan)