Aside from the main text of the "Kojiki," it appears that the compilation history was not recorded and the oldest manuscript was from the period of the Northern and Southern Courts (refer to the manuscript), therefore, some people don't believe the Kojiki maintains the original issues prior to the period of the Northern and Southern Courts and this adds to the theory that the original was falsified.
『古事記』本文の記述以外には編纂の記録が直接は見当たらず、最古の写本も南北朝時代のもの（写本を参照）であるため、それより以前の姿をそのままにとどめているかどうかに疑義を抱く改竄説も出されている。