A 5.8-magnitude earthquake struck off the eastern coast of Japan early Wednesday, the U.S. Geological Survey said.
There were no immediate reports of injuries or damage, and no tsunami alert was issued.
The moderate quake struck off the east coast of Honshu, the main island, about 4:30 a.m., the USGS said. Its center was 95 miles east-southeast of Tokyo.
The quake had a reported depth of almost 11 miles.
More than a year ago, a 9.0-magnitude earthquake triggered a huge tsunami off Japan, resulting in thousands of deaths and the world's worst nuclear crisis in a quarter-century.