A strong earthquake jolted Tokyo and surrounding areas early yesterday morning, throwing food and bottles from store shelves, disrupting transport and closing a nuclear power plant for safety checks.

The magnitude 6.5 quake centred around 150 km southwest of Tokyo damaged the main motorway south from the capital and prompted a brief suspension of high-speed train services, but there were no reports of major casualties.

"I was sleeping and there was a big jolt right at the beginning, so I leapt out of bed," said Rieko Yoshizaki, 57, in Hamamatsu, Shizuoka prefecture, near the epicentre.

"I was surprised ... and I hugged my dog."

Public broadcaster NHK said 81 people suffered injuries, most of them minor, from the 5.07 a.m. (2007 GMT, Monday) tremor.

The quake, with a focus 20km below the surface of Suruga Bay in Shizuoka prefecture, had a preliminary magnitude of 6.5, the Japan Meteorological Agency said.

The Tomei Motorway that runs between Tokyo and Nagoya was closed by a landslide and the weather agency warned that heavy rain since Monday meant further slips were possible.

Those storms have killed at least 13 people in Japan, with a further 15 missing.

TV pictures from Shizuoka showed glass bottles shattered on the floor of a convenience store, a TV newsroom with videotapes thrown from shelves, and a temple where tiles had been shaken off the roof and were scattered on the ground. Around 5,000 bottles of iced tea were smashed at one factory.

It was the second strong quake in Japan since Sunday evening and came shortly after a magnitude 7.6 earthquake struck the Andaman Islands in the Indian Ocean.

Chubu Electric Power Co. automatically halted operations at its nuclear plant in Hamaoka, Shizuoka, after the quake, which briefly cut power to more than 9,000 homes.