Especially with the Emperors of Kesshi-Hachidai (Eight Undocumented Sovereigns), a negative theory stating that the history of the Imperial Family was padded out following the revolutionary idea (Shinisetsu, or theory of predicting future with magic) in Ancient China is the main stream in learned society after the war (there are also theories that support the existence).
特に欠史八代の天皇については、古代中国の革命思想（讖緯説）に則って天皇家の歴史を水増したのではないかと指摘する否定説が戦後学会では主流である（実在説もある）。