A moderate earthquake measuring 5.4 on the Richter scale hit Japan's northernmost Hokkaido region Saturday, said the Japan Meteorological Agency Saturday.

The focus of the quake, which occurred at 9:36 local time (0036 GMT), was some 100 km underground at Hidaka-shicho Seibu region, Kyodo News quoted the agency as saying here.

There were no immediate reports of casualties or damage to property.