The typhoon's slow movement led to tremendous rainfall accumulations across parts of southeastern Japan, with some areas seeing continuous rain for six days. Multiple stations recorded over of rain, primarily across Shikoku, with a peak of in Hiso, Tokushima. Of this, fell in a 24-hour span between September 11-12, the highest such total on record in Japan. However, sources differ on this total with some indicating the peak 24-hour total being in Fukuharaasahi, or , which was observed in Kito. Regardless of which total was valid, it remained the national record until August 2004 when Typhoon Namtheun produced a 24-hour total of in Kisawa. Significant totals across other prefectures include in Motoyama, Kōchi, in Uchinomi, Kagawa, on Mount Dainichi, and on Mount Ōdaigahara.