According to the "Nihonshoki," because Ominagi as a uneme (a court lady) had became pregnant with the Emperor Yuryaku after spending only one night; then the Emperor Yuryaku had doubts as to whether this daughter (Princess Kasuga no Oiratsume) was truly his child or not, and he did not raise her as her own.
『日本書紀』によると、雄略天皇は采女の童女君がたった一夜で身ごもったために、生まれた春日大娘皇女が自分の娘であるかどうかを疑い、養育されなかった。