A 6.4 magnitude earthquake struck off the coasts of Kagoshima and Miyazaki prefectures on Tuesday evening, the Meteorological Agency said. There were no immediate reports of damage or casualties.
The epicenter of the quake, which hit at 9:39 p.m. and measured 4 on Japan's seismic intensity scale, was 30 km deep and located near Tanegashima, 116 km southeast of Kagoshima.
Japan is one of the world's most seismically active countries and accounts for about 20 percent of the world's earthquakes of magnitude 6 or greater.