Japan chasing mystery submarine
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Japan's navy keeps pace with an unidentified submarine spotted inside the country's waters on Wednesday.
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A Japanese navy aircraft chased an unidentified submarine out of waters near Japan's Okinawa island chain on Wednesday in a rare display of the country's military capability, long constrained by a pacifist constitution.
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Japan's navy was mobilized on Wednesday  after an unidentified submarine was found in Japanese waters,  the top government spokesman said, confirming a report by  public broadcaster NHK.
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Japan&#39;s Defense Agency suspects that an unidentified submarine sighted in Japanese waters early Wednesday was a Chinese nuclear submarine, Kyodo News reports.
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Japan has identified the submarine spotted in Japanese waters on Nov. 10 as belonging to China&#39;s navy, Chief Cabinet Secretary Hiroyuki Hosoda said.
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After days of speculation and a chase by Japanese destroyers and a surveillance plane, it has finally been determined that the nuclear submarine that intruded into Japanese territorial water between Okinawa and Taiwan was Chinese.
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The fragile relations between Tokyo and Beijing were further weakened yesterday when a suspected Chinese nuclear submarine was chased out of Japanese territorial waters.
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There is a military alert in Japan after an unidentified submarine is detected inside the country's waters.
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Japan said on Wednesday it found   radioactive matter from water samples taken around a U.S.   nuclear-powered submarine off its eastern coast, but the amount   was small and posed no harm to humans or the environment.
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TOKYO  - Japan has determined a submarine that briefly intruded into Japanese territorial waters earlier this week without identifying itself came from China, an official said Friday.
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Russia is sending a submarine to explore the ocean floor below the North Pole to support claims to the Arctic.
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Japan will protest to China after concluding that a nuclear-powered submarine that intruded into its waters this week belonged to the Chinese navy, top government spokesman Hiroyuki Hosoda said on Friday.
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By Kunitoshi Sakurai  An unusual preliminary environmental survey was conducted recently along the coastal area of Henoko point in Nago, Okinawa Prefecture, with the participation of a Maritime Self-Defense Force (SDF) minesweeper tender.
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Japan continued Friday to monitor the movements of an unidentified submarine that entered its waters briefly Wednesday, to see if it entered Chinese waters.
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Japan was on alert after a suspected Chinese nuclear submarine entered its territorial waters, setting off a chase on the high sea amid mounting disputes between the Asian powers.
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Japan protested to China on Friday after  concluding that a nuclear-powered submarine that intruded into  its waters this week belonged to the Chinese navy.
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Japan will protest to China after  concluding that a nuclear-powered submarine that intruded into  its waters this week belonged to the Chinese navy, top  government spokesman Hiroyuki Hosoda said on Friday.