Save Gender Feminine & Masculine Usage Japanese Scripts 真珠, 火星, 万珠, etc.(Japanese Kanji) Pronounced Pron. MAH-SUU [key] Meaning & History From Japanese 真珠 (ma-su) meaning "pearl", 火星 (ma-su) meaning "mars" or other kanji pronounced in the same way.Usage of this name is, most likely, influenced by the word mussel or Mars.