A strong quake was felt late Tuesday in Tokyo, shaking buildings in Japan's capital four days after a massive tremor sparked a devastating tsunami that ravaged the country's northeast coast.
The Japan Meteorological Agency put the magnitude of the quake at 6.0.
The epicentre was located in Shizuoka prefecture, about 120 kilometres (75 miles) southwest of the capital, and near Mount Fuji, which is prone to earthquakes.
The quake occured at a relatively shallow depth of 10 kilometres.
The US Geological Survey put the magnitude at 6.1 and said it had been preceded a few minutes earlier by another 5.8-magnitude tremor. The epicentre of that aftershock was located 315 kilometres northeast of Tokyo.