Save Gender Feminine Usage Japanese Scripts なつよ(Japanese Hiragana) 夏世, 夏代, 夏夜, 奈津代, etc.(Japanese Kanji) Pronounced Pron. NAH-TSOO-YO [key] Meaning & History From Japanese 夏 (natsu) meaning "summer" combined with 世 (yo) meaning "world, society" or 代 (yo) meaning "generation". Other kanji combinations are possible.