However, compared to "Koninshiki" (the Japanese reading of a Chinese character is written by Manyo-gana (a form of syllabary used in the Manyo-shu or Collection of Myriad Leaves), and ancient special Kana usage is also accurate) which was cited as 'the Konin theory' in an old manuscript of Shoki (Jindaiki (Records of period of gods) of the Kengen book), the existing denpon (existent books of transcription and published books) (most of the Japanese readings of Chinese characters are written in katakana (syllable based writing system of the Japanese language)) was greatly deteriorated during the process of transcript, so that it is regarded to be different from the original form.
が、書紀古写本（乾元本神代紀）に「弘仁説」として引用されている『弘仁私記』（和訓が万葉仮名で表記され上代特殊仮名遣も正確）と比べると、現在の伝本（和訓の大半が片仮名表記）は書写の過程ではなはだしく劣化したものであり、原型をとどめていないと見られる。