| The following article is currently being improved for the benefit of all visitors. Pages carrying this template may contain issues which will be fixed as soon as an editor is available to do so. Please bear with us while improvements are being made. Therefore we request visitors to give editors time and patience to work on the page and assume good faith until the edits are complete. We apologize for the inconvenience this may cause in the meantime.
Please be aware that pages which are not given such a chance before this template is removed will be protected until an experienced editor is available to work on the page.
Prior to joining Morning Musume, Sayashi was a member of ASH (an Acting School in Hiroshima).
Sayashi was one of the winners of the Jc&Jk actress audition and got a chance to perform in Morning Musume's Fashionable stage play.
The ninth generation members debuted in Morning Musume January 2, 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 27, 2011, It was announced Sayashi would be replacing Erina Mano for the radio show Mano Deli, renaming it Riho Deli.
On July 29, 2011 Sayashi was out of events for a few weeks to rest due to ischium nerve pain on her right side.
In July 2012, it was announced that Sayashi will be part of the new Hello! Project duo Peaberry, along with S/mileage's Ayaka Wada, and that they would perform their original song "Cabbage Hakusho" at the Hello! Project summer concerts. They were formed alongside the group DIY♡ to be part of Hello! SATOYAMA Life.
Hello! Project groups and unitsEdit
- "Maji Desu ka Ska!" (April 6, 2011)
- "Only You" (June 15, 2011)
- "Kono Chikyū no Heiwa o Honki de Negatterun Da yo! / Kare to Issho ni Omise ga Shitai!" (September 21, 2011)
- "Pyoco Pyoco Ultra" (January 25, 2012)
- "Ren'ai Hunter" (April 11, 2012)
- "One Two Three / The Matenrō Show" (July 4, 2012)
- "Wakuteka Take a Chance" (October 10, 2012)
- "Help Me!!" (January 23, 2013)
- "Brainstorming / Kimi Sae Ireba Nani mo Iranai" (April 17, 2013)
- Hello! Project Mobekimasu
- "Busu ni Naranai Tetsugaku" (November 16, 2011)
|#||Title||Release date||Top position||Publisher/Notes|
|1||Sayashi Riho ~Greeting~ (さやし りほ～Ｇｒｅｅｔｉｎｇ～?)||August 31, 2011||51||Zetima|
|2||RIHO||January 20, 2012||—||e-Hello! series|
|3||Hyahhoi (ひゃっっほ～い♪( ´θ`)ノ Hyahhhōi?)||September 26, 2012||68||Zetima|
|4||Snowdrop (snowdrop?)||March 2013||e-Hello! series|
- Sayashi Riho (さやしりほ?) (August 27, 2011, Wani Books, ISBN 978-4-8470-4391-8)
- Un Deux Trois (アンドゥトゥア?) (August 27, 2012, Wani Books, ISBN 978-4-8470-4486-1)
- Bijo Gaku (美女学?) (2011)
- Hello Pro! Time (ハロプロ！Time?) (April 2011 – May 2012)
- Hello! Satoyama Life (ハロー!SATOYAMAライフ?) (June 2012 – present)
- Riho Deli (2011–)
- UstreaMusume (2011–)