An earthquake of magnitude 6.3 struck near the south coast of Japan's island of Honshu early today, the European earthquake monitoring service EMSC reported.
The estimated population of the area where the earthquake was felt is 30 million inhabitants, EMSC said.
There were no immediate reports of damage or injuries.
People as far away as Tokyo reported feeling tremors.
One witness in the Japanese capital posted on the EMSC-CSEM website: "Bigger than usual. Tokyo has small ones from time to time but this one lasted longer and was bigger."
- Reuters