We studied the autumn (September–November) food habits of the raccoon dog (Nyctereutes procyonoides) by sampling the stomach contents of 64 individuals (male, n = 31; female, n = 33) killed on national roads in Ibaraki Prefecture. Our aim was to examine sex differences in the autumn food habits of raccoon dogs in suburban area where human related disturbances can occur on the raccoon dogs. The frequency of occurrence (FO) and the percent volume (PV) of fruits and insects were high for both males and females and FO and PV of garbage were low for both males and females. There were no significant differences between the sexes for food items. FO and PV were not significantly different between sexes for adults and yearlings. This is likely because males and females may use the same area even in suburban area, and they likely both forage on the most abundant food resources that are easily accessible within their habitats.