Chief Cabinet Secretary Hiroyuki Hosoda said the submarine was spotted by a reconnaissance plane near the Sakishima island chain off Okinawa. He said the submarine had now left Japan's waters, but that it was being followed by a reconnaissance plane and a destroyer in the hope it would surface and show its flag. Japanese officials refused to speculate on the submarine's nationality. But Japan's Kyodo news agency quoted defence officials as saying it was a Chinese nuclear-powered sub. | More likely a diesel-electric boat, nuke subs don't run on the surface. |
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