TOKYO - A magnitude 8.5 earthquake struck off the east coast of Japan on Saturday, shaking buildings in Tokyo but with no immediate reports of damage, public broadcaster NHK said.
There was no danger of tsunami, it added.
The earthquake, centred off the Ogasawara islands south of Tokyo, was felt widely in Japan but occurred at a depth of 590 km.
Tokyo Electric Power Co said there were no abnormalities at the crippled Fukushima nuclear power plant following the quake. The runways at Tokyo's Narita airport were operating normally but the high-speed bullet train service between Tokyo and Osaka was halted due to a power outage, NHK said.