A tsunami warning for waves up to three metres has been issued after a 7.3 magnitude earthquake hit northeastern Japan.
Tokyo Electric Power Co said it was checking its nuclear plants in Fukushima prefecture for any damage.
The epicentre is not far from Fukushima’s Daiichi plant, which in 2011 had a nuclear meltdown following Japan’s strongest-ever earthquake – a 9.0.
The Fukushima plant was seriously damaged by a 9.0 quake and tsunami in 2011
Monday’s quake struck off the Japanese coast, 67 km northeast of Iwaki city, at a depth of 10 km, the US Geological Survey said.
The red and yellow areas have been warned about a possible tsunami
TV pictures showed ships moving out to sea from Fukushima harbours.
Tokyo also felt tremors from the earthquake – which struck at 6:00 AM local time (9:00 PM GMT), according to Japan’s Meteorological Agency.
There are so far no reports of damage or injuries.