A Chinese frigate and an unidentified foreign submerged submarine were spotted Thursday just outside Japanese territorial waters near the Senkaku Islands in the East China Sea, the Defense Ministry said, prompting Tokyo to protest to Beijing.It is the first known time that a submerged foreign submarine has entered the contiguous zone, an area just outside Japanese waters around the Japan-controlled, China-claimed islands. The ministry believes the submarine is also from China.A ministry official also said this was only the second confirmed instance of a Chinese frigate entering the contiguo…READ FULL ARTICLE