Riho Sayashi

Sayashi Riho was one of the winners of the Jc&Jk actress audition and got a chance to perform in Morning Musume's "Fashionable" stage play.

Sayashi passed Morning Musume's ninth generation auditions, along with Ikuta Erina, Suzuki Kanon and former Hello! Pro Egg Fukumura Mizuki.
The ninth generation members debuted in Morning Musume January 2nd, at the Hello! Project 2011 Winter ~Kangei Shinsen Matsuri~ concert.

Sayashi's debut single in Morning Musume is titled "Maji Desu ka Ska!".

On March 27th, 2011, it was announced Sayashi would be replacing Mano Erina for the radio show "Mano Deli", renaming it "Riho Deli".

On July 29, 2011 it was revealed Sayashi will be out of events for at least six weeks to rest due to ischium nerve pain on her right side.

On April 18 2012, it was announcced that Tanaka Reina and Morning Musume's 9th & 10th Generation members will star in a new stage play titled Stacey’s Shoujo Saisatsu Kageki. The musical will run from June 6-12.
On July 20, 2012, it was announced that Sayashi and Wada Ayaka were choosen to form the duo, Peaberry.