Which of them is the original legend is not determined, but at least in "Kojiki" and "Nihonshoki" there is obviously quite a discrepancy in the tale of Emperor Buretsu, still doubts remain if he actually existed.
何れが原伝承かの判断は分かれるが、少なくとも『古事記』と『日本書紀』とでは、武烈天皇の伝承にかなりの食い違いが見られており、武烈天皇自身が実在したかどうかについても疑問が残る。