Seven people had been confirmed dead as of Tuesday following the torrential rain that hit the northern part of the Kyushu region from the early hours of Monday.
Five were found dead in Fukuoka Prefecture, and the other two in neighboring Saga Prefecture. Searches for missing people continued in Saga and Oita Prefecture.
In the Fukuoka city of Dazaifu, a man in his 50s was found dead in a flooded underpass on Monday night.
A landslide hit two houses on Monday morning in the Saga city of Karatsu, leaving a woman in her 70s dead.
On Tuesday, search operations resumed around 7 a.m., involving about 200 people including Saga Prefectural Police and members of the Self-Defense Forces.
Around 10:50 a.m., the body of a man was found by a Saga prefectural helicopter near the mouth of the Tamashima River in Karatsu. He was later confirmed to be one of the two people missing in the landslide.
In the Oita city of Nakatsu, police Monday morning received news from a relative of a woman in her 50s that the woman was about to be caught in a river current. The woman remained missing, while her car, which she had been driving at the time, was found.
Around 120 people from the prefecture's police and fire departments searched for her from Tuesday morning mainly in an area along the Yamakuni River where a smartphone believed to be hers was found.
Linear precipitation zones formed in Fukuoka, Saga and Oita one after another, causing localized heavy rain from the early hours of Monday that resulted in landslides and other disasters.