Save Gender Masculine Usage Japanese Scripts 政太郎, 正太郎, etc.(Japanese Kanji) Pronounced Pron. MAH-SAH-TAH-RO [key] Other Forms FormsMasatarou Meaning & History From Japanese 正 (masa) meaning "correct, right, proper, justice" or 成 (masa, naru) meaning "to become, to get", 太 (ta) meaning "thick, big, great" and 郎 (rō, ryo) meaning "son". Other kanji combinations are possible.