Save Gender Masculine Usage Japanese Scripts 瑠輝斗, etc.(Japanese Kanji) Pronounced Pron. ṘUU-KEE-TO [key] Meaning & History From Japanese 瑠 (ru) meaning "lapis lazuli", 輝 (ki) meaning "brightness; lustre; brilliance; radiance; splendour" combined with 斗 (to), which refers to a Chinese constellation. Other kanji combinations are also possible.