Two Russian warships fired missiles at a mock target in the Sea of Japan on Tuesday.
The Russian Ministry of Defence said the missiles successfully hit their target.
Japan's Foreign Minister said no damage had been reported - but the country would stay vigilant.
Stuart Smith has more from Moscow.
The Russian Ministry of Defence said the missiles successfully hit their target.
Japan's Foreign Minister said no damage had been reported - but the country would stay vigilant.
Stuart Smith has more from Moscow.
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