Two moderate earthquakes shook Tokyo and northeastern Japan early Saturday, but there were no immediate reports of injuries or damage.
No tsunami warnings were issued for the two unrelated temblors, the Meteorological Agency said.
A quake with preliminary magnitude of 5.4 occurred 50 kilometers (30 miles) below the seabed off the coast of Hachijo-Jima island in the Pacific Ocean at 3:15 a.m. Saturday (1815 GMT Friday). About two and half hours later, a magnitude 4.5 quake centered off the coast of Ibaraki jolted dozens of towns in northeastern Japan, the agency said. Both quakes were felt in the capital.
There was no fear of a tsunami, huge waves caused by undersea disturbances or volcanic activities, from either quake, it said.