A strong earthquake hit Ibaraki Prefecture, north of Tokyo, on Wednesday night, Japan's NHK World reported. 
There was no threat of tsunami. 
The Japan Meteorological Agency said the quake occurred in the northern part of the prefecture. 
The agency estimates the tremor had a magnitude of 6.3 and that its focus was 11 kilometers deep. 
The jolt registered an intensity of 6 minus on the Japanese seismic scale of zero to 7 in the city of Takahagi. 
An intensity of 5 plus was recorded in the city of Hitachi. Tremors were felt in wide areas of eastern Japan. 
Officials at the Nuclear Regulation Authority said there are no abnormalities at nuclear plants and nuclear power-related facilities near the epicenter, including the Fukushima Daiichi plant. 
Japan's Prime Minister Shinzo Abe ordered officials to quickly look into the situation and assess damage, work closely with local government officials and provide information on possible evacuation.

Source: QNA