A tsunami warning has been issued for the Miyagi Prefecture, marked in red on the map above.
The same area was hit by a devastating earthquake and tsunami in March 2011.
That quake triggered fuel-rod meltdowns at the Fukushima nuclear plant, causing radiation leakage, contamination of food and water and mass evacuations in the world's worst nuclear crisis since Chernobyl in 1986.
More top news
British Somalis are facing a race against time to save the financial lifeline that allows them to send millions of pounds back home.
ITV News' Alastair Stewart travelled to the Cypriot resort of Varosha - a ghost town that acts as a reminder of the Cypriot partition.
Julie Etchingham meets Hadisa Hussain, a young Afghan woman receiving treatment in the UK for a facial deformity that threatened her life.