No tsunami warning was issued after the offshore quake, which shook the coastal cities of Kushiro and Nemuro.
Main Japanese media shops carried no quick reviews of injury or accidents.
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The quake hit at 10:27 p.m. (1327 GMT) at a depth of round 43 kilometers (27 miles), the USGS mentioned.
An professional talking on public broadcaster NHK warned residents to be vigilant in opposition to quakes for a couple of week.
Earthquakes are widespread in Japan, which sits on the Pacific “Ring of Hearth,” an arc of intense seismic exercise that stretches by way of Southeast Asia and throughout the Pacific basin.
The nation has strict building laws supposed to make sure buildings can face up to sturdy earthquakes, and routinely holds emergency drills to organize for a serious jolt.