An earthquake 7.3 magnitude has struck off Japan’s east coast.

Japan’s emergency agencies declared a tsunami warning for the area of Honshu but not for the rest of the Pacific.

The tremor was felt in Tokyo, 480 kilometres away.

All but two of Japan’s 50 reactors have been offline since the March 2011 magnitude 9.0 earthquake and ensuing tsunami triggered multiple meltdowns and massive radiation leaks at the Fukushima Daiichi nuclear power plant.

It’s about 250 kilometres northeast of Tokyo.

At least 19-thousand people were killed.