Tokyo: An earthquake measuring 6.5 on the Richter scale struck off Japan's east coast on Friday, weather officials said.
According to the Japan Meteorological Agency (JMA), the tremblor occurred at 9.14 a.m., and struck at a latitude of 34.4 degrees north and longitude of 141.7 degrees east, with the epicentre in the Pacific Ocean, Xinhua news agency reported.
The JMA registered the depth of the temblor as being 10 km under the sea.
The agency has not issued a tsunami warning or advisory as a result of the off-shore quake, but said there might be "slight sea-level changes in coastal regions".