三佳千夏 (Miyoshi Chinatsu), born as Chigi Rumiko (千木留美子) and currently known as Tani Rumiko (谷ルミコ), is a Japanese and Korean singer. She became a member of Hello! Project in 1999, leaving in late 2000, returning to South Korea. Since her marriage in 2006 to Korean pop singer Kim Jung Min, she has been working as a talent while maintaining her blog. (오뜨랑에서 실시간으로 번역된 한글 프로필도 확인할 수 있어요) 2025년 각집부부에 출연했다. 2000년 Hello! Project 2000 〜集まれ! サマーパーティー〜에 출연했다. 1999년 Hello! Project '99에 출연했다.