Save Gender Masculine Usage Japanese Scripts 太一郎, etc.(Japanese Kanji) Pronounced Pron. TA-EE-CHEE-ṘO [key] Other Forms FormsTaichiro Meaning & History From Japanese 太 (ta) meaning "thick, big", 一 (ichi) meaning "one" and 郎 (rou) meaning "son". Other combinations of kanji characters can also form this name.