Kojiki-Den [古事記傅] volume 1, Explanation by Itwse (005)
Given the case, the reason why Syoki was edited is not if Kojiki had an error.
From the first, it has the meanings deferent to each other.
Suppose it has had an error, and it still wasn’t reduced, then that must be immediately forgotten just like as the two records, however, only the record has been known up to the present time. You should think of the fact.
By the way, there was a happen that a person suspected, “whethr it has been handed down for the later eras or not, are decided accidentally. Because it is not correct that good one were handed down, and not good one were not handed down, commonly, in China and Our states, such the case are lot which the very good old works are forgotten, and not very good works are handed down. Is this untrue?”
I answered, “in many case it is true, but even so, in this case it isn’t so.”
First, those two were official records because Syoki and Shokki have recorded the things about the two, therefore, if the two were accidentally forgotten, it must not forget quickly, and many people recognized two around that time, at least, those titles should be handed down. However, persons does not know even the titles of two.
In the period of Nara (710-784), already no one knew the records, but we couldn’t find that were refered with an annotation describing old matters in Manyousyuu and other works.
Nevertheless, Kojiki doesn’t like the national records of China, which having no embellishment and just recorded the pure traditions, therefore, if it had a lot of errors, it would be immediately forgotten, wouldn’t be to attract some persons and wouldn’t be handed down, because thus the people preferring Chinese books are many in that time. However, it does be handed down from the time for thousand years later, then I think that though Syoki have been edited, but even it would be used in public, civilians would also read it, and it be referred on Manyoushiu.