A magnitude 5.9 earthquake struck near Tokyo late on Thursday. Officials say it did not trigger a tsunami.
Meteorological Agency officials are warning of the possibility of quakes with a similar intensity over the next week or so.
The quake occurred at 10:41 p.m. Its focus was in Chiba Prefecture east of Tokyo, at a depth of 75 kilometers.
The tremor was widely felt in the greater Tokyo area.
The quake registered an intensity of 5 plus on Japan's seismic scale of zero to seven in Tokyo and Saitama.
Local authorities have received several reports of injuries. But they say there are no reports of major structural damage.
Prime Minister Kishida Fumio is in his office overseeing the government's response.
Authorities reported several injuries in Tokyo area. They say there are no reports of major damage.
The earthquake affected public transportation in the greater Tokyo area.
Officials say one train derailed after making an emergency stop in Tokyo's Adachi ward and at least three people were injured.
Railway officials say service on the Tokaido bullet train line remains suspended. Service on some other bullet train lines was also halted but has resumed.
People were lining up at many stations in Tokyo to catch taxis after some local lines were suspended after the quake.
Part of a wall of a building in Ueno in northern Tokyo collapsed but no injuries were reported so far.
Police officials at the scene are asking people to stay away from damaged area.
NHK footage shows black smoke coming from a window of a house in Saitama Prefecture near Tokyo.
Fire officials are extinguishing the flames. No injuries have been reported so far.
Water pipes were ruptured in several affected places.
Water is seen gushing to nearby houses and sidewalks.
Officials say no abnormalities have been detected at nuclear-related facilities in Ibaraki and Kanagawa Prefectures near Tokyo. They are continuing to check the facilities.
Officials are warning residents to be cautious of structural damage that may have already occurred in the affected area.