An earthquake with a preliminary magnitude of 6.2 hit the western Chugoku region of Japan on Tuesday, followed by a series of sizeable aftershocks, the Japan Meteorological Agency said, according to Mehr News Agency.
The epicentre of the first earthquake was in eastern Shimane prefecture, the agency said, adding that there was no danger of a tsunami.
Chugoku Electric Power, which runs the Shimane Nuclear Power Station about 32 km (20 miles) away, said operations were continuing as usual at its No.2 unit.
Japan's Nuclear Regulation Authority said there were no irregularities following the quake.
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