JLPT N1 Vocabulary 日夜 (nichiya) day and night, always JLPT N1 Learning Done Flashcards Recall mode Meaning 日夜 (にちや, nichiya) is a JLPT N1 vocabulary word meaning “day and night, always”. Kanji in this word 日 day 夜 night ← Previous間々 All N1 vocabulary Next →業