TOKYO – Japan has determined that a submarine that briefly entered Japanese territorial waters earlier this week without identifying itself came from China, an official said on Friday.
Chief Cabinet Secretary Hiroyuki Hosoda said Tokyo had reached its conclusion after considering a range of factors, including the fact that the submarine appeared to be heading toward China.
“Judging from several pieces of information, we found that the submarine belongs to the Chinese navy and we plan to lodge a protest soon through diplomatic channels,” Hosoda told a news conference.
Japan’s navy has been on alert since Wednesday, when the submarine was first spotted off Japan’s southern island of Okinawa. Tokyo has said it doesn’t know where the sub came from, despite Japanese media reports citing defense officials as saying the vessel was likely a Chinese nuclear submarine.