Reuters are reporting that the tsunami warning for north-eastern Japan has been lifted according to Japanese broadcaster NHK.
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The 36-year-old was last seen on Thursday evening.
Sophie Neville, cast as Titty as a young child in the 1974 classic Swallows and Amazons, is advising its modern-day adaptation.
At least two people are feared dead in the attack which is the latest on medical facilities in the war-torn country.