Save Gender Feminine Usage Japanese Scripts 千夜子, 智哉子, etc.(Japanese Kanji) チヤコ(Japanese Katakana) Pronounced Pron. CHEE-YAH-KO [key] Meaning & History From Japanese 千 (chi) meaning "thousand", 夜 (ya) meaning "night", combined with 子 (ko) meaning "child". Other kanji combinations are possible.A famous bearer is Chiyako Shimada, Japanese politician.