Kanji

Kanji has 2 pronunciations, kun-yomi & on-yomi.
Before importing kanji, we had original nihongo – Yamato kotoba.
We adopted Yamatokotoba（大和言葉） to kanji.
Kojiki（古事記/こじき） was written by kanji but based on 大和言葉pronunciation.
The word “makoto” appeared in 古事記 as 眞事登（まこと）. Then our ancient adopted kanji 誠.
誠　will be divided in to 言+成. In Japanese, this is 言うことが成る. In English, come true.
We imported kanji as a tool of expression.