The book describes each successive generation of Japanese emperor, from the age of myth all the way up until Emperor Gomurakami's enthronement (the passage on Emperor Godaigo's death is borrowed from the Kakurin, a section from an ancient Chinese history book).
日本神話から後村上天皇の即位（後醍醐天皇の死を「獲麟」に擬したという）までが、天皇の代毎に記される。