In 2011, she became one of the finalists on the vocal category of the EXILE Presents VOCAL BATTLE AUDITION 3 ~For Girls~ but got defeated by the vocalists of the group Flower. After that, she started attending EXPG in Fukuoka. Some time later, in 2012, she won the Dream Vocalist loved by ViVi award at the KING RECORDS Presents Dream Vocal Audition.
She made her major debut single with the song "Dear Heaven" in January 2013.
In May 18, 2017, Shionoya decided to retire from the entertainment industry as she expressed desire to start a new life.
- [2015.10.28] S with
- [2013.01.23] Dear Heaven
- [2013.05.15] Katakoi / Smile again
- [2013.08.21] Ocean Blue
- [2013.11.06] Snow Flakes Love / Ichirinka
- [2014.06.04] Like a flower
- [2016.06.22] SMILEY DAYS
- [2016.12.07] Mahou
- [2012.10.24] ONE
- [2016.07.31-2016.08.05] Shionoya Sayaka LIVE 2016 ~always with you~
- [2013.01-2015.03] Shionoya Sayaka no "Kiite Kudasari Arigatou Gozaimasu RADIO"
- [2013.07-2013.12] FM OSAKA E∞tracks Selection "Shionoya Sayaka no Salty cafe"
- [2016.09-present] YAMAMAN presents MUSIC SALAD FROM U-kari STUDIO
- She calls the Flower vocalists as her "rivals" and she wants to "work harder with each other".
- She got paired with Flower member Washio Reina on EXILE Presents VOCAL BATTLE AUDITION 3 ~For Girls~ auditions.
- Her inspiration as singer is Ito Yuna.