Various falsifications seemed to be made in the "Kojiki" and the "Nihonshoki," and one of the problems arising from the falsifications is that the imperial line was indicated as if it had been succeeded by Male-line Emperors.
『古事記』、『日本書紀』にはさまざまな造作が加えられているとされるが、その問題の1つには天皇が男系で継承されてきたように記した点である。