A strong earthquake has hit northern Japan, weeks after a devastating quake rocked the area.
Preliminary reports said the new quake was centered in the eastern Kanto region.
The quake - measuring a preliminary 5.8 on the Richter scale - hit Monday morning local time. It could be felt 200 kilometers away in Tokyo.
Six people were injured when parts of a wall fell on them and a high-speed bullet train in the province was halted as a precaution. But authorities said there was no danger of tsunami.
Northern Japan has been hit with a series of aftershocks since an earthquake, measuring 6.8, hit Niigata Prefecture on October 23. It killed 39 people and left more than 2,000 injured.
Some information provided by AP and Reuters.