JLPT N1 Vocabulary 一変 (ippen) complete change, about-face JLPT N1 Learning Done Flashcards Recall mode Meaning 一変 (いっぺん, ippen) is a JLPT N1 vocabulary word meaning “complete change, about-face”. Kanji in this word 一 one 変 unusual ← Previousニュアンス All N1 vocabulary Next →売り出し