Riho Sayashi

• Name — Riho Sayashi • Native Name — 鞘師里保 • Born — 28 May 1998 • Birthplace — Hiroshima Prefecture, Japan • Occupation — * Singer • actress • dancer • Agent — * Up-Front Promotion (20112018) • Japan Music Entertainment (2020present)

Prior to joining Morning Musume, Sayashi was a student of Actor's School Hiroshima (ASH), which graduates include Suzuka Nakamoto, Himeka Nakamoto, members of Perfume, and Ruru Dambara.

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 member Mizuki Fukumura. The ninth generation members debuted in Morning Musume January 2, at the Hello! Project 2011 Winter ~Kangei Shinsen Matsuri~ concert. Sayashi's first single with 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". 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. On October 29, 2015, it was announced that Sayashi will graduate from Morning Musume '15 on December 31, 2015, during the annual Hello! Project Countdown Live. On December 29, 2015, Morning Musume '15 released their 60th single; this was the last Morning Musume single to feature Sayashi. On December 31, 2015, Sayashi graduated from Morning Musume and became an artist under Hello! Project.

After leaving Morning Musume, Sayashi went to New York and other places abroad for about two years to study dancing and English. On December 7, 2018, it was that announced her contract with Up-Front Promotion had ended and she subsequently graduated from Hello! Project at the end of November 2018.

After a 3-year and 3-month hiatus, Sayashi re-appeared to the public at Hello! Project 20th Anniversary!! Hello! Project Hina Fes 2019 on March 30. She made a guest appearance at the event and performed with several current and former Morning Musume members. On June 28, Sayashi appeared as a support dancer, or "Avenger", for the kawaii metal band Babymetal on the "Babymetal Awakens -The Sun Also Rises-" concert in Yokohama Arena. Two days later on June 30, she also appeared with them at the Glastonbury Festival in the same capacity, as they became the first Japanese band to perform on a main stage at the festival.

On May 1, 2020, Sayashi started an Instagram account, where she posts in Japanese and English. Since July 10, Sayashi has her own column called RihoColumn in the online magazine NewsCrunch, published by Wani Books. On September 3, Sayashi announced she had signed to Japan Music Entertainment as a solo artist. On July 14, 2021, Sayashi's staff announced the sale of her first EP, named Daybreak, which was released at August 4, under her newly established label "Savo-r", and also held a one-man live tour titled "Riho Sayashi 1st Live 2021 Daybreak" at Toyosu Pit, Tokyo Team Smile. This album was her first newly made material after five and half years, after her graduation from Morning Musume in 2015. Sayashi wrote the lyrics for all the songs on the album, and worked together with several composers. Sayashi choreographed the AKB48 song "Donchō o Agetekure!", first performed at the AKB48 Theater in Akihabara on December 8, 2024.

Sayashi's paternal uncle, Tomoya Sayashi, formerly played for the Hiroshima Toyo Carp baseball team.

• Morning Musume (2011–2015) • Hello! Project Mobekimasu (2011) • Peaberry (2012–2015)

• Symbolized (July 24, 2024)

• Title — Release date — Top position — Publisher/Notes • Oricon Weekly Chart • Daybreak — August 4, 2021 — 21 — Savo-r • Reflection — January 12, 2022 — 18 — Savo-r • Unison — November 16, 2022 — 19 — Savo-r • Too Much! — July 23, 2025 — — — Avex • Own — September 2, 2026 — — — Avex

• "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, 2011) • "Wakuteka Take a Chance" (October 10, 2012) • "Help Me!!" (January 23, 2013) • "Brainstorming / Kimi Sae Ireba Nani mo Iranai" (April 17, 2013) • "Wagamama Ki no Mama Ai no Joke / Ai no Gundan" (August 28, 2013) • "Egao no Kimi wa Taiyō sa / Kimi no Kawari wa Iyashinai / What is Love?" (January 29, 2014) • "Toki o Koe Sora o Koe / Password is 0" (April 16, 2014) • "Tiki Bun / Shabadaba Dū / Mikaeri Bijin" (October 15, 2014) • "Seishun Kozo ga Naiteiru / Yūgure wa Ameagari / Ima Koko Kara" (April 15, 2015) • "Oh My Wish! / Sukatto My Heart / Ima Sugu Tobikomu Yūki" (August 19, 2015) • "Tsumetai Kaze to Kataomoi / Endless Sky / One and Only" (December 29, 2015)

• "Reborn ~Inochi no Audition~" (October 8, 2011)

• "Busu ni Naranai Tetsugaku" (November 16, 2011)

• "Cabbage Hakusho ~Haru Hen~" (February 27, 2013)

• Title — Release date — Top position — Publisher/Notes • Oricon Weekly DVD Chart • Sayashi Riho ~Greeting~ — August 31, 2011 — 51 — Zetima • Riho — January 20, 2012 — — — e-Hello! series • ひゃっっほ～い♪('θ')ノ — September 26, 2012 — 68 — Zetima • Snowdrop — March 28, 2013 — — — e-Hello! series • Riho's Fashion Archive — March 12, 2014 — 32 — Zetima

• Title — Release date — Top position — Publisher/Notes • Oricon Weekly Blu-ray Chart • sixteen — April 8, 2015 — 27 — Zetima

• Sayashi Riho (August 27, 2011, Wani Books) • Un Deux Trois (August 27, 2012, Wani Books) • Taiyou (November 25, 2013, Wani Books) • Juurokusai (March 25, 2015, Wani Books)

• Sūgaku Joshi Gakuen (2012) • Don't Stop My Beautification, Masumi Haraguchi (2023) • 3=Mentsuyu Hitori Meshi, Tsuyu Mendō (2023) • 3=Oshi o Meshiagare, Yuzu Hodaishi (2023) • 3=Mentsuyu Hitori Meshi 2, Tsuyu Mendō (2024)

• Bijo Gaku (2011) • Hello Pro! Time (April 2011 – May 2012) • Hello! Satoyama Life (June 2012 – 2014) • NHK High School Course, English Communication I host (2022)

• Fashionable (2010) • Reborn: Inochi no Audition (2011) • Lilium: Girls' Purity Musical (2014) • Death Note: The Musical, Misa Amane (2025)

• Riho Deli (2011–2015)

• UstreaMusume (2011–201(?))

The authorities additionally record the heading Sayashi Riho. Her recorded language was Japanese. Other recorded relations include Tomoya Sayashi.