ひょうがいおんくん 表外音訓 LinksSentence search for 表外音訓Sentence search for ひょうがいおんくんKanji details for 表, 外, 音 and 訓Edit in JMdict Noun1. kanji reading that has not been approved by the government (and is not to be taught in public schools) Discussions Log in to talk about this word.