The Kanchu-keizu showcases original lore that cannot be found not only in the Kojiki (Records of Ancient Matters) and the Nihonshoki (Chronicles of Japan) but also in ancient records such as "Kujihongi" (Ancient Japanese History) and supplements the Hon-keizu with the information about older ancestors, who are considered to be omitted in the Hon-keizu.
「記紀」は勿論、『旧事本紀』などの古記録にも見られない独自の伝承を記すとともに、「本系図」上代部で省略されたと覚しき箇所もこれによって補い得る。