Japan Meteorological Agency reported 280 millimeters of rainfall on Friday within 12 hours In the city of Ichihara.
In Japan, at least 10 people were killed in floods and landslides caused by heavy rains.
According to the Kyodo agency in Japan, heavy rainfall since yesterday has been effective in the capital of Tokyo.
In Chiba, due to heavy rainfall, 15 rivers were flooded and 800 people were evacuated from their homes, 1200 students were trapped in schools.
Rescue teams of the Fire and Disaster Management Agency evacuated 60 students and teachers stranded in a kindergarten in the city of Sanmu with special vehicles.
Flights were cancelled at Narita International Airport in Chiba administrative district, and about 3000 passengers had to spend the night at the airport terminal due to the cancellation of train and bus services. Some hospitals and nursing homes were also affected.