Ban advocated a Chronicles of Japan falsifying theory in "Hikobae" (Essays on Study of Historical Artefacts), and based on this theory he argued the enthronement theory in "Nagara no Yamakaze," supposing that the first year of Emperor Otomo was established in "Chronicles of Japan" in 714.
伴は『比古婆衣』で日本書紀改刪説を唱え、『長等の山風』でこの説を根拠に据えて即位説を論じ、和銅7年の『日本書紀』には大友天皇の元年が立てられていたと推測した。