Thunderstorms are predicted on Tuesday for areas in southwestern Japan still reeling from torrential rains that have left 25 people dead and another 25 unaccounted for.
The Japan Meteorological Agency is warning of more heavy rain in northern parts of the island of Kyushu though early Wednesday morning and calling for caution against landslides.
About 1,500 people have been displaced from their homes in Fukuoka and Oita prefectures.
Rescue workers including Self-Defense Forces troops and firefighters are continuing their work in hard-hit Asakura, Fukuoka Prefecture, reopening road links to previously isolated areas.
Prime Minister Shinzo Abe plans to visit the affected areas on Wednesday, according to Chief Cabinet Secretary Yoshihide Suga, the government's top spokesman. The prime minister is set to arrive back in Japan on Tuesday afternoon after cutting short his European tour due to the disaster.