Japanese authorities have warned that the ongoing heavy downpour could lead to a "serious disaster." Nearly 70,000 people in Hiroshima Prefecture have been asked to evacuate.
At least one person was killed and tens of thousands of people were asked to evacuate as "unprecedented" torrential rains hit western Japan on Friday, authorities said.
"There is a possibility that a serious catastrophe will occur in the coming days," said a spokesman for the Japan Meteorological Agency.
The rain triggered a landslide in the city of Unzen in Nagasaki early Friday, which engulfed two houses of four residents and threatens to cause flooding and new landslides in the region.
The Fire and Disaster Management Agency said one person was believed to have died. Two more remain missing.
The heaviest rainfall fell in the western prefecture of Hiroshima, where at least 69,500 people received orders for optional evacuation.
The Japan Meteorological Agency has issued a 5th-level hazard warning in Hiroshima, adding that the downpours are predicted to continue for several days over a large area of the country.
“We have issued a special heavy rain warning (in the city of Hiroshima). This is a level of heavy rain that we have never experienced before,” the JMA said in a statement.