In addition, according to "Nihonshoki," "Tennoki" (a Record of the Emperors), and "Kokki" which were regarded to be compiled by Prince Shotoku and SOGA no Umako in 620 were older history books, but they were burnt at the Isshi no hen (the Murder in the Year of Isshi) in 645.
なお、『日本書紀』によれば、推古天皇28年（620年）に聖徳太子や蘇我馬子によって編纂されたとされる『天皇記』・『国記』の方がより旧い史書であるが、皇極天皇4年（645年）の乙巳の変とともに焼失した。