The giant mudslide in Atami, Shizuoka prefecture, which occurred around 10:30 a.m. local time on Saturday, came after parts of the region were hit by torrential rain.
An Atami city official confirmed to CNN that two women had died in the landslide.
Police and firefighters have been searching for the missing and so far, 10 people have been rescued in Atami city. Operations stopped overnight and resumed on Sunday at 6 a.m. local time, with 700 people from the police, fire department service and Japan Self-Defense Forces assisting.
As of 6:30 a.m., some 380 people have been evacuated, and 10 evacuation centers have been opened in the city, the Atami city official said.
More than 80 houses were swept away in the mudslide, Atami City’s Fire Disaster and Management Agency said. Sakae Saito, the mayor of Atami city, told reporters that up to 100 to 300 households were affected.
About 2,830 households in the city lost power, according to the Tokyo Electric Power Company. By Sunday, power had mostly been restored in Shizuoka.
Atami resident Yuji Shima managed to evacuate with his wife and mother but said he lost his home in the mudslide, which looked “like a tsunami.”
“The first thing that struck me was the sound of the ground rumbling. There was such a muddy, chemical stench in the air — of course as so many things were being washed away. It all happened in a split-second,” he said.
Shima said he’d lived in the area for 50 years and though he’d experienced typhoons and heavy rains, he said, “I’ve never lived through anything like this.”
“I prioritized my family’s safety. We just got ourselves here and didn’t take anything with us. We had a lot of people helping us so we had access to food and water,” he said. “It’s a blessing I survived.”
The government has set up a task force to respond to the disaster and collect information as heavy rainfall sweeps areas along the Pacific coast in central and eastern Japan.
Heita Kawakatsu, the governor of Shizuoka prefecture, expressed his “deepest sympathies” to those affected by the landslide and to “those who have been forced to evacuate,” he told a Saturday press conference.
Kawakatsu warned that more rain is expected and said residents should watch out for further landslides. “There are many places where the ground is loose, so please evacuate from dangerous places, listen to information from the city and town, and make sure you and your family are safe,” he said.
So far, evacuation orders have been issued for people in areas surrounding Tokyo, as well as in Shizuoka, and Aichi prefectures, according to Japan’s public broadcaster NHK.
The authorities have issued landslide warnings for parts of Shizuoka, Kanagawa, Chiba and Yamanashi prefectures, NHK reported.
The rain front is expected to move toward the Sea of Japan coast over the weekend, with areas along the coast forecast to see torrential rain on Monday and Tuesday, according to Japan’s Meteorological Agency, which also warned of landslides and flooding in low-lying areas.
“Japan has a whole lot of risk factors leading to landslides. For instance, it’s prone because of its mountainous terrain and a lot of places where the soil is volcanic ash, which is not as strong,” seismologist Robert Geller, professor emeritus of the University of Tokyo, told CNN.
“Global warming is making everything worse and is increasing the frequency of rainfall that can cause damaging landslides,” Geller added. “The rainy season is going to last for another week or 10 days. Because of global warming, we’re probably getting more rainfall now than we normally do.”
CNN’s Larry Register contributed to this report.