Nishiwaki Sayaka

 (西脇彩華) is a founding member of 9nine.

On May 21, 2023, she announced her marriage.

Cover Albums

 * [2008.12.17] ORDINARY VENUS

Albums

 * first9
 * second 9
 * 9nine
 * CUE
 * MAGI9 PLAYLAND
 * BEST 9

Singles

 * Sweet Snow
 * Natsufuku
 * Shiroi Hana
 * SKY (CM Version)
 * Show TIME
 * Merry-go-round
 * Sakura Prelude
 * Unbalance
 * Happyx2 Eyes
 * Smile Again
 * Smile Again / Totsuzen no Love Call
 * Hikari no Kage
 * Cross Over
 * SHINING☆STAR
 * Natsu wanna say love U
 * Tik Tak☆2NITE
 * Shoujo Traveler
 * Ryuusei no Kuchizuke
 * Yie Ar! Jiang Shi feat. Hao Hao! Jiang Shi Girl / Brave
 * White Wishes
 * colorful
 * Evolution No.9
 * Re:
 * With You / With Me
 * HAPPY 7 DAYS
 * MY ONLY ONE
 * Ai Ai Ai

Television

 * [2010 - 2011] HEY!HEY!HEY!
 * [2010 - 2011] Ukiuki! MIX Girl

Trivia

 * She graduated from Horikoshi High School, known for being attended by many celebrities.
 * Her older sister is Perfume member Nishiwaki Ayaka
 * She attended Actors School Hiroshima, joining with the 3rd generation