The powerful typhoon rolling across Japan crossed the Boso Peninsula in Chiba Prefecture Friday morning and is expected to head to the Pacific Ocean and turn into an extratropical cyclone off the Sanriku coast in northeast Honshu by the evening.
The Meteorological Agency warned of flooded rivers and landslides as heavy rain continued in many areas of the country.
At least seven people were reported dead and nearly 50 injured.
The agency issued its first special alert Monday warning that the season's eighth typhoon, nicknamed Neoguri, could be the strongest in decades.
According to the agency, over the 24-hour period through 6 p.m. Saturday, Hokkaido is forecast to receive 120 mm of rain, Hokuriku 100 mm and Tohoku 80 mm.
Hokkaido may experience heavy rainfall of 50 mm per hour in some areas until the evening.
For three hours near dawn Friday, the city of Izu, Shizuoka Prefecture, received 39.5 mm of rainfall, while Akkeshi, Hokkaido received 37.0 mm and Morioka, Iwate Prefecture, 33.0 mm.
Strong winds hit many places, with gusts reaching 20.7 meters per second on Hachijo Island south of Tokyo.
Coastal areas were meanwhile experiencing high waves.
One of the biggest storms ever to strike Japan at this time of year, Neoguri made landfall in Kyushu at Akune, Kagoshima Prefecture, after sweeping through Okinawa, where it caused floods and knocked out power.
In areas where Neoguri passed through, temperatures are expected to rise, in many spots to higher than 30 degrees.