The Japan Meteorological Agency (JMA) issued its strongest possible warning about the “historic” rainfall and said more was set to batter already saturated areas through Sunday, raising the danger of more landslides and major damage.
At least 27 people were killed and several people were missing, NHK national television said.
Several dozen people were injured, four seriously, the Fire and Disaster Management Agency said. Several people were buried in a landslide and rescuers rushed to dig them out.
About 210,000 people were ordered from their homes due to the danger of further landslides and flooding, nearly half of them in a wide area surrounding Japan’s ancient capital of Kyoto, and nearly 2 million more were advised to leave, as of Friday afternoon, the Agency added.
Trains across western and central Japan were halted, including several sections of the Shinkansen bullet train.
The danger was particularly high in a part of the southwesternmost main island of Kyushu, where dozens of people were killed by torrential rain and floods a year ago.
The rain appeared to have been touched off by warm, humid air flowing up from the Pacific Ocean and intensifying the activity of a seasonal rain front.
Remnants of a now-dissipated typhoon that brushed Japan this week also contributed, officials said.
Japan’s weather woes are far from over. Typhoon Maria, forming deep in the Pacific, is set to strengthen, possibly into an intense Category 4 storm, and may directly target the southwestern islands of Okinawa early next week.