At least 48 people were killed in Monday's earthquake in western Japan which caused a small tsunami and left buildings blazing and roads buckled.
Rescue workers looked for people feared trapped in rubble amid about 155 aftershocks, which are complicating recovery efforts.
The 7.5-magnitude quake, which hit Ishikawa prefecture on the main island of Honshu, also caused a port fire and has wrecked motorways.
Officials said 16 others were seriously injured, while damage to homes was so great that it could not immediately be assessed, they said.
Japanese media reports said tens of thousands of homes had been destroyed and almost 45,000 households were without power in the region where temperatures touched freezing overnight.
“Saving lives is our priority and we are fighting a battle against time,” Prime Minister Fumio Kishida said Tuesday. “It is critical that people trapped in homes get rescued immediately.”
“We have to race against time to search for and rescue survivors of the disaster.”
The US Geological Survey (USGS) said the quake had a magnitude of 7.5. Japan's meteorological agency measured it at 7.6, and said it was one of more than 150 to shake the region through Tuesday morning.
Japan's military sent 1,000 soldiers to join rescue efforts, Mr Kishida said, stressing they were facing “large-scale damage.” Details of damaged homes were still under investigation, he said.
Firefighters continued to battle a fire in Wajima city that engulfed row of houses, with people being evacuated in the dark, some with blankets and others carrying babies.
A duty officer at Wajima Fire Department told they still were being overwhelmed Tuesday by rescue requests and reports of damages.
Tsunami warning lifted
On Monday waves at least 1.2 metres high hit Wajima, and a series of smaller tsunamis were reported elsewhere.
But warnings of much larger waves proved unfounded and on Tuesday Japan lifted all tsunami warnings.
A total of 62,000 people had been ordered to evacuate, according to the fire and disaster management agency.
About 1,000 people were staying at a military base, the Defence Ministry said.
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Firefighters search for missing people at the site of a collapsed house in the city of Wajima. AFP -
A man who lost his house in the earthquake visits the graves of his parents. Reuters -
People walk past fallen electric pylons and damaged buildings. AFP -
A rescue dog joins firefighters searching for people in the rubble of a collapsed house. AFP -
A crushed car in the town of Anamizu. AFP -
A family member reacts as a body is recovered from a destroyed building in Suzu, Japan. AP -
Rescuers search a house partially destroyed by the quake, in Suzu. AP -
Japanese military helicopter crew members prepare to transport a Suzu resident injured in the quake. Reuters -
A man searches a collapsed house following the quake. Officials have warned people to stay away from their homes because of a risk of stronger quakes. AP -
Firefighters prepare to start search operations at a collapsed building in Wajima, Ishikawa prefecture. AP -
Japanese Self-Defence Force soldiers and rescue workers at a collapsed house caused by an earthquake in Wajima. Reuters -
An aerial view of damage from the earthquake at the port in Suzu, central Japan. At least 48 people were killed and 107 injured, according to local authorities. EPA -
Smoke rises from the site of a fire caused by an earthquake in Wajima, in Japan's Ishikawa prefecture. AP -
A car stuck in a crack in the road near Ujima, Ishikawa prefecture. Reuters -
A toppled building after the earthquake. AP -
A car in Nanao, Ishikawa prefecture, crushed beneath a building after the earthquake. Bloomberg -
People receive water packs at the town hall in Shika, Ishikawa prefecture. AFP -
A fire rages in Wajima after the quake. AP -
Supermarket customers during the earthquake in Toyama, Japan. AP
Monday's quake shook apartments in the capital Tokyo some 300 kilometres away, and several major motorways were closed around the epicentre, Japan's road operator said. Bullet train services from Tokyo were also suspended.
Japan experiences hundreds of earthquakes every year and the vast majority cause no damage.
The country has strict regulations intended to ensure buildings can withstand strong quakes and routinely holds emergency drills.
In 2011, a 9.0-magnitude undersea quake off north-eastern Japan triggered a tsunami that left around 18,500 people dead or missing.
The 2011 tsunami also sent three reactors into meltdown at the Fukushima nuclear plant, causing Japan's worst post-war disaster and the most serious nuclear accident since Chernobyl.
Japan's nuclear authority said there were no abnormalities reported at the Shika atomic power plant in Ishikawa or at other plants after Monday's quake.
Japan is frequently hit by earthquakes because of its location along the Ring of Fire, an arc of volcanoes and fault lines in the Pacific Basin.
