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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.


Sayashi passed Morning Musume's ninth generation auditions, along with Erina Ikuta, Kanon Suzuki, and former Hello! Pro Egg Mizuki Fukumura.[1][2]

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.

Sayashi was the only ninth generation member to receive solo lines in "Only You".[citation needed]

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



Morning Musume
Hello! Project Mobekimasu


# Title Release date Top position Publisher/Notes


1 Sayashi Riho ~Greeting~ (さやし りほ~Greeting~?) August 31, 2011 51 Zetima
2 RIHO[4] 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



  1. Sayashi Riho (さやしりほ?) (August 27, 2011, Wani Books, ISBN 978-4-8470-4391-8)
  2. Un Deux Trois (アンドゥトゥア?) (August 27, 2012, Wani Books, ISBN 978-4-8470-4486-1)[5]







  • Riho Deli (2011–)


  • UstreaMusume (2011–)

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