Dictionary/甥おいOiJLPT N1甥 (Oi) is a Japanese noun meaning “nephew”.MeaningsnounnephewExamplesジョンは私の甥です。John is my nephew.甥は夜更かしになれていた。My nephew was accustomed to sitting up late.彼は私の息子ではなく、甥である。He is not my son, but my nephew.Sentences from Tatoeba (CC BY 2.0 FR).Kanji in 甥甥nephew