Save Gender Masculine Usage Japanese Scripts 幸太郎, 孝太郎, 耕太郎, 光太郎, etc.(Japanese Kanji) Pronounced Pron. /ˈkoː.ta.ɾoː/ [key·simplify] Other Forms FormsKōtarō, Koutarou Meaning & History From Japanese 幸 (kō) meaning "good luck", 孝 (kō, "obedience"), 耕 (kō, "to plow") or 光 (kō, "shine") combined with 太 (ta) meaning "big" and 郎 幸 (rō) meaning "son". Other character combinations are possible.