Eastern Hokkaido was jolted Sunday morning by an earthquake with an estimated magnitude of 5.5, the Japan Meteorological Agency said.
No tsunami warnings were issued after the 3:26 a.m. quake. It originated about 30 km below the surface off the coast of the Tokachi region. There were no immediate reports of casualties or damage.
The quake registered an intensity of 3 on the Japanese seismic scale of 7 in Niikappu, Urakawa, Hiroo and Churui.
Hokkaido was shaken by a series of powerful earthquakes last month that caused hundreds of injuries.