Shuya Mizuno, stage name "Shu-ya" (しゅうや), is one of Ayumi Hamasaki's Back-up Dancers. He was born in Sapporo, Hokkaido.
- Birth Name: Shuya Mizuno
- Stage Name: Shu-ya
- Birth Date: June 13, 1979
- Birthplace: Sapporo, Hokkaido Prefecture
Shu-ya is best in free-style. He has won a number of prizes in his late teens, including the Sapporo Dance Battle (SDB) 1997 and 1998 as well as the SDB Grand Champion 1997. He formed a dance group called "STALKERS" with ZIN, another one of Hamasaki's dancers.
He joined Ayu's dance group in 2004 and his first appearance on Ayu's stage was Countdown Live 2004-2005. Starting from Hamasaki's my name's WOMEN, Shuya appears as the leading actor in some of Ayu's latest PVs, including part of Me and Days.