表外音訓 ひょうがいおんくん Meanings Noun kanji reading that has not been approved by the government (and is not to be taught in public schools) Kanji 表 express. Read as ヒョウ. 外 outside. Read as ガイ. 音 sound. Read as オン. 訓 instruct. Read as クン. Jinuma: Japanese Dictionary · Word lists