Tokyo: A strong earthquake centred off the coast of northeastern Japan shook buildings as far as Tokyo and led to a tsunami warning for coastal areas of the northeast, public broadcaster NHK said on Friday.

The earthquake had a preliminary magnitude of 7.3, the US Geological Survey said. That was revised from an earlier estimate of 7.4.

A warning for a one metre tsunami was issued for the coast of Miyagi Prefecture in northeastern Japan, which was hit by a devastating earthquake and tsunami on March 11, 2011.