A strong earthquake has shaken northeast Japan but a tsunami warning issued for the coast – already devastated by last month’s massive quake – has been lifted.
There were no immediate reports of injuries or damage.
Engineers working at the badly damaged Fukushima nuclear power plant were briefly evacuated, although officials say no irregularities have been reported.
The quake, which measured 7.1, struck 40 kilometres off the east coast of Honshu island.
The quake was strong enough to shake buildings in Tokyo, 265 kilometres away.
About 28,000 people are dead or still missing after the March 11 disaster.