The agency said that the earthquake occurred at around 06:08 GMT with a magnitude of 5.2 on the Japanese seismic, adding that the earthquake occurred in waters off the coast near the city of Suzu at a depth of about 6.2 miles.
The agency said that there was no threat of a tsunami despite the significant magnitude.
Japanese broadcaster NHK reported that following the earthquake, a collection and response headquarters was established under the Office of the Japanese Prime Minister.
There are no immediate reports of casualties or any damage caused by the earthquake.