In his books, Myogaku described the methods of Hansetsu (Chinese phonology "fanqie": a method to indicate the pronunciation of a kanji character by using two other characters) by using kana (the Japanese syllabary) from the 'Gojuonzu' ("fifty-sound" syllabary chart).
彼は諸著書の中で仮名による反切の方式を述べ、「五十音図」を示している。