Severe tropical storm Krosa has barreled through western Japan, leaving one person dead and more than 30 others injured.
Officials have issued warnings in many areas for landslides, strong winds, high waves and swollen rivers.
The Meteorological Agency says the storm is moving north after bringing torrential rain to Hiroshima and Shimane prefectures.
Some areas have seen more than 700 millimeters of rainfall. More heavy downpours are expected for wide areas along the Pacific coast on Friday.
Officials have issued landslide warnings in Nara, Wakayama, Yamanashi and Gifu prefectures.
The storm is expected to bring heavy rain to the northern part of the country through Saturday.
Krosa has disrupted transport services during the peak summer holiday period in Japan. Airlines canceled over 800 domestic flights on Thursday.
Another 52 flights were axed on Friday morning and flights to and from Tohoku and Hokkaido face disruptions depending on the course of the storm.
Airlines are advising passengers to check online for the latest flight information.
Bullet train services in western Japan were either cancelled or reduced on Thursday. They are expected to be back to normal on Friday.
But Hokkaido Railway Company said it will cancel some regular train services because of the approaching storm.