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.
The epicenter of the first earthquake was in eastern Shimane prefecture, the agency said, adding that there was no danger of a tsunami.
Chugoku Electric Power 9504.T, which operates 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.
Earthquakes in Japan over the years
The plant's No. 2 unit restarted in December 2024 for the first time since all of Japan's nuclear power plants were shut down following the March 2011 Fukushima disasters.
The earthquake had a seismic intensity of upper-5 on Japan's 1-7 scale, strong enough to make movement difficult without support.
Earthquakes are common in Japan, one of the world's most seismically active areas. Japan accounts for about one-fifth of the world's earthquakes of magnitude six or greater.
West Japan Railway 9021.T said it had suspended Shinkansen bullet-train operations between Shin-Osaka and Hakata following the quake.