A strong magnitude 5.9 earthquake struck north of Tokyo at around 2 a.m. Sunday, injuring more than 10 people in the Kanto region and disrupting some services.
The Japan Meteorological Agency said the quake was centered in southern Ibaraki Prefecture at a depth of about 68 kilometers. No tsunami threat was reported.
The shaking was felt across Tokyo, Ibaraki, Saitama and Chiba, with strong tremors recorded in parts of the region. The JMA warned that long-period ground motions could cause high-rise buildings in Tokyo to sway.
A burst water pipe was reported in Tokyo's Koto Ward, while elevators temporarily stopped at several locations, trapping some people before the incidents were resolved.
At a supermarket in Tokyo's Adachi Ward, a large amount of fire-extinguishing foam was released, with police investigating whether the malfunction was caused by the quake.
Operators of the Tokai No. 2 and Fukushima Daiichi nuclear plants reported no abnormalities, with radiation levels remaining unchanged. Authorities also warned of possible aftershocks.
