Typhoon Nanmadol moved across the Japanese archipelago toward the Pacific and weakened to a low pressure system on Tuesday after pounding the southwest with heavy rain and triggering landslides, leaving two people dead, one missing and over 100 injured.
After travelling along the Sea of Japan coast, the typhoon moved through the northeastern region of the country's largest main island of Honshu early Tuesday, with the weather agency warning of strong winds, high tides and potential landslides in areas already hit by heavy rain.
The season's 14th typhoon was one of the most powerful storms the country has ever seen when it reached the southwestern region of Kyushu on Sunday, bringing unprecedented winds and intense rainfall.
In Miyazaki Prefecture, a man was found dead after his mountainside cabin was destroyed by a mudslide, and another man was confirmed dead after being pulled out of a car submerged in flooded farmland.
A man was missing in Hiroshima and at least 115 people were injured, according to prefectural governments and the disaster management agency.
More than 100,000 homes were still without power as of 11am, Kyushu Electric Power Co said.
Landslides and a fallen bridge were confirmed in the mountainous region of Miyazaki Prefecture, while part of the Hikone Castle structures, designated an important cultural property, in Shiga Prefecture was found damaged.
For Tuesday, the Japan Meteorological Agency forecast winds of up to 108 kilometres per hour in northeastern Japan and waves of up to 7 meters in western Japan, covering Osaka.
Rainfall of up to 80 millimetres was expected over the 24 hours through noon Wednesday in central and eastern Japan, including Tokyo, and 60mm in the northeast.