(1) During the breeding seasons of 1979-81 the food remains of a pair of Brown Hawk Owls Ninox scutulata were collected every day from June 1 to August 31, at Jokoji Temple, Kanzakicho, Saga Pref.(2) The food remains collected included insects (40 families, 123 species), lizards (1 family, 1 species), birds (5 families, 5 species), and mammals (1 family, 1 species).(3) The food remains were overwhelmingly of insects. The total numbers of insects were 1, 456 (1979), 2, 120 (1980) and 2, 392 (1981). Food remains increased slightly with the number of nestlings.(4) Ninety-three to ninty-six percent of the food remains of insects were comprised of just seven families. They were Lasiocampidae, Noctuidae, Sphingidae, Scarabaeidae, Buprestidae, Cerambycidae and Cicadidae. Seasonal changes of food items appeared to be directly related to seasonal changes in the abundance of the prey.(5) Birds were captured especially during the early part of the breeding season. They were considered to provide a good source of protein when insect food was insufficient