A magnitude 6.1 earthquake has hit off the coast of Japan, the US Geological Survey says.
The agency's website says the quake hit early on Thursday about 283 kilometres southeast of the city of Kamaishi and more than 322km east of Fukushima.
A massive 2011 earthquake and tsunami caused meltdowns at three reactors in the Fukushima nuclear plant.
Fewer than 40 reports of people feeling Thursday's quake were registered on the Geological Survey website.
It comes as Mexico is reeling from a magnitude-7.1 earthquake that collapsed buildings and killed at least 225 people.
