In an entry for September of the same year, there is an article pertaining to the establishment of inukaibe (corporations of dog keepers) but it is clear from the numerous examples in which surviving miyake place names are located next to inube place names that watchdogs were used to guard miyake (watchdogs were reared by the Inukai clan), and it is surmised that the establishment of miyake and inukaibe also began during the reign of Emperor Ankan (first half of the sixth century).
また、同年八月の条に、犬養部の設置記事がみられるが、現存する屯倉の地名と犬養という地名との近接例も多いことから、屯倉の守衛に番犬が用いられた（番犬を飼養していたのが犬養氏）だということが明らかになっており、屯倉や犬養部の設置時期も安閑天皇の頃（6世紀前半頃）に始まったと推察される。