Japanese weather officials say Severe Tropical Storm Nanmadol is now an extratropical low-pressure system over the Pacific east of Japan.
The Meteorological Agency says Nanmadol became a low at 9 a.m. on Tuesday after barreling across Japan's northeastern Tohoku region.
Officials say localized downpours of more than 50 millimeters per hour are still possible through late Tuesday afternoon in eastern and northern Japan.
Rainfalls in the 24 hours through Wednesday morning could reach up to 120 millimeters in Kanto-Koshin, 100 millimeters in Tokai and Tohoku, and 80 millimeters in Hokkaido and Niigata prefectures.
Very strong winds are also expected for several more hours, mainly in coastal areas. Gusts may reach up to 126 kilometers per hour in Hokuriku, Niigata, Tohoku, Kanto-Koshin and Hokkaido.
The seas will remain rough on Tuesday, with waves likely to reach seven meters off the Chugoku and Kinki regions, and six meters off Hokuriku, Niigata, Kanto, Tohoku and Hokkaido.
Heavy rainfalls have loosened the ground and caused rivers to swell in some areas. Weather officials are warning residents to stay alert for landslides, flooding, strong wind gusts and high waves.