"Tennoki," "Kokki," and "Omi Muraji Tomonomiyatsuko Kuninomiyatsuko Momoamariyasotomono wo Awasete Oomitakaradomono Mototsufumi," only the titles of which are described in the "Nihonshoki," no longer exist and the contents of the books are unknown.
『天皇記』、『国記』、『臣連伴造国造百八十部并公民等本記』は、『日本書紀』中に書名のみ記載されるが、現存せず内容は不明。