This emphasis on sounds was one of several motorists for Kūkai's championing in the phonetic producing process, the kana, which was adopted in Japan within the time of Kūkai. He is usually credited with the creation with the kana, but there is apparently some question about this Tale among Students. https://michelangelol294nlm0.humor-blog.com/31535979/not-known-factual-statements-about-vashikaran