Real name: 千木留美子 (Rumiko Chigi)

Effective period / Period of releases: 1999

Rumiko Chigi is a former Japanese singer. She now goes by the name Tani Rumiko (谷ルミコ).

She won the "1st Morning Musume & Heike Michiyo Protegee Audition" in February 1999 and was given a solo career within Hello! Project. She was given the artist name Miyoshi Chinatsu (三佳千夏) and released three singles. In September 2000, Chinatsu appeared in what would be her last concert.

Chinatsu re-entered the music scene in 2005, when she contributed to a soundtrack to a horror movie called Kokkuri-san.