Scores of people were feared buried alive Saturday after two powerful quakes hit southern Japan a day apart, killing at least 41 people, as a forecast storm threatened more devastating landslides.
Homes, roads and railway lines were swept away when huge hillsides collapsed as thousands of tonnes of mud were dislodged by the thunderous seismic tremors.
Buildings were reduced to rubble, including a university dormitory and apartment complexes, with dozens of people unaccounted for over a wide area.
"We are aware of multiple locations where people have been buried alive,"
Chief Cabinet Secretary Yoshihide Suga told a press conference.
Police officers conduct a search operation at the site of a landslide caused by an earthquake in Minamiaso village, Kumamoto prefecture, Japan, Saturday, April 16, 2016. The powerful earthquake struck southwestern Japan early Saturday, barely 24 hours after a smaller quake hit the same region (AP-Yonhap)
Japan's Kyodo news agency reported that about 380,000 homes in Kumamoto were cut off from water supplies.
Japan's Meteorological Agency said rain was expected to hit Kumamoto overnight and some areas would see heavy downpours on Sunday, raising the risk of further landslides in places where soil and rock has already been loosened.
Twitter user @kbbblove pleaded for help for "about 30 people" still trapped at a campsite.
"Please go rescue them before the rain and wind comes because it's close to a mountain," the user wrote.
The town of Misato urged more than 10,000 people to evacuate Saturday for fear of a landslide, national broadcaster NHK reported.
The government is to send 25,000 troops and more than 1,000 emergency responders including firefighters and police to the stricken region.
"It has already started raining and the rain and winds are expected to get stronger," Prime Minister Shinzo Abe said at an emergency meeting in the evening.
"Night-time rescue missions will be very difficult but people are waiting,"
he said.
The government is also preparing to provide enough food for all the evacuees for three days.
Japan, one of the world's most seismically active countries, suffered a massive undersea quake on March 11, 2011 that sent a tsunami barreling into its northeast coast.
Some 18,500 people were left dead or missing, and several nuclear reactors went into meltdown at the Fukushima plant in the worst atomic accident in a generation.
Japan's only working nuclear plant, southwest of Saturday's epicenter, was unaffected by the quakes, the government has said. (AFP)
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