NHK has learned that more than 13,000 homes were flooded due to Typhoon Hagibis which swept across Japan.
Data collected from NHK stations across the country showed that more than 1,100 houses were destroyed or partially damaged.
Water rose above the ground floor in 7,394 homes in 16 prefectures, including Nagano and Tochigi.
Water entered below the ground floor in 6,509 houses in 21 prefectures, such as Shizuoka and Saitama.
A total of 77 homes in seven prefectures were half-destroyed while 1,038 homes in 21 prefectures were partially damaged.