As described below, it is assumed that some records that were not convenient for the Yamato kingship were intentionally erased (some books were burnt) when kiki (the Kojiki and Nihonshoki) was compiled.
次のことから記紀の編纂時にヤマト王権以前の都合の悪い記録を意図的に消しさった（徹底した焚書があった）と考えられる。