Kyodo news agency reported that a tsunami warning was issued for Iwate Prefecture, with a 20cm wave observed at Kuji port in Iwate roughly an hour after the tremor, while a 10cm wave reached the shores of Miyako, Iwate.
The advisory was lifted at 10:20 a.m., according to the Japan Meteorological Agency, while the government reported that no injuries or damage had been reported.
The tremor hit at 08.06 a.m. (1106GMT Monday) and originated in the Pacific about 210km east of Miyako at a depth of around 10 km.
Kyodo reported that it is believed to have been an aftershock of the magnitude-9.0 earthquake that struck the country’s northeast in March 2011.
Japan’s coastal areas of Aomori, Iwate, Miyagi and Fukushima prefectures were devastated in the wake of the March 11 quake. An ensuing massive tsunami killed more than 18,000 people and triggered a nuclear disaster.
Japan is one of the world’s most seismically active areas. It accounts for around 20 percent of the world’s earthquakes of magnitude 6 or greater.