An earthquake hit the Kanto region in and around Tokyo a little after 9 a.m. on Monday, local time.
It had an estimated magnitude of 5.5.
No tsunami advisories have been issued.
Meteorological authorities say the quake had an intensity of 4 on the Japanese scale of 0 to 7 in the hardest hit areas.
Seismologists say the focus was estimated to be 60 kilometers under the seabed.
The hardest hit prefectures were Tokyo, Chiba and Kanagawa.
Aviation officials in Tokyo say that operations at Narita and Haneda airports have not been disrupted by the quake.
Train services in the area are operating as usual.