Hiraki Yui (平季唯) is a Japanese singer-songwriter. Hiraki got her started in music at a early age when she was in the school choir from 3rd grade and beyond. She was also an athlete as she participated in her middle school's 100 meter hurdle. But she dreamt of being a musician then an athlete. She debuted in 2006 with the single Ouka after getting the attention of song producer and singer Asada Yuusuki on the television audition Uta Stig!.
- Birthdate: April 5, 1984
- Birthplace: Koriyama, Fukushima Prefecture
- Blood Type: A