Japan's Meteorological Agency has lifted all highest-level emergency rain warnings for Nagasaki Prefecture. But it's calling on residents to remain on high alert for landslides and other disasters amid torrential rains.
A footage from Tsushima island shows storm water pouring from a partially completed mud-control dam. Thick brown water is inundating a residential area.
The rains in parts of the prefecture reached an intensity seen only once every several decades.
Rainfall in the cities of Tsushima and Goto reached more than 100 millimeters during a one-hour period on Saturday morning.
There have been numerous reports of landslides. Mudslide alerts have also been issued in parts of nearby Miyazaki Prefecture.
Officials warn of a continuing risk of floods, dangerous winds and more landslides in western Japan.