Sasaki Yuuko (佐々木ゆう子) is a Japanese pop singer who made her debut in 1997. Sasaki got her start after winning an ASAYAN vocal audition, securing a record deal with Pioneer soon after. In 2000 she became a member of the group Plum Planets, and after the group disbanded in 2003 she disappeared from the music scene. In 2006, Sasaki made a comeback and signed to the label Columbia Records, releasing two singles.
In 2010, she resumed activity with the start of an official blog. She also started having interviews and live shows, and in 2012 she released an indies single, "Blue to Orange no Kanata ni."
- Birthdate: September 21, 1976
- Birthplace: Sendai, Miyagi Prefecture
- Blood Type: B
- Height: 160 cm
- Hobbies: Fishing, Camera
- Favorite Artists: Yano Akiko, Sheryl Crow, Diana Carter
- Favorite Actor: Brad Pitt
- [1997.09.10] Koi wa C'est si bon (恋はC'est si bon)
- [1998.01.21] Mr. Policeman / Ichiban Ii Toki (Mr.Policeman / いちばんいい時)
- [1998.03.11] Genki Desu ka (元気ですか)
- [1999.01.27] PURE SNOW
- [1999.03.17] GRADUATION
- [1999.11.25] pray / Gyutto Zutto...
- [2006.05.24] Sajou no Yume (砂上の夢)
- [2006.08.23] One Kiss
- [2012.01.19] Blue to Orange no Kanata ni
- [1999.11.10] tribute to REBECCA DREAM DISCOVERY (#9 "London Boy")