- Name: Sugaya Risako (菅谷梨沙子)
- Nicknames: Rii (りー), Risako (りさこ)
- Birthday: April 4, 1994
- Birthplace: Zushi, Kanagawa, Japan
- Blood type: A
- Height: 162 cm
- Hello! Project groups:
Sugaya Risako joined Hello! Project in 2002 as a member of Hello! Project Kids after passing the group's audition. In 2004, she was one of eight members selected to form Berryz Kobo. She is one of the group's main singers and arguably the most prominently featured member.
On February 26, 2015 Risako announced that she would be taking a break from show business following the indefinite hiatus of Berryz Kobo.
- Click here for Berryz Kobo releases
- [2011.03.29] LOVE Namida Iro (LOVE涙色; LOVE the Color of Tears) (original: Matsuura Aya)
- [2011.03.30] Akai Nikkichou (赤い日記帳; Red Diary) (original: Akagumi 4)
- [2011.03.30] Egao ni Namida ~THANK YOU! DEAR MY FRIENDS~ (笑顔に涙; Smiles and Tears ~THANK YOU! DEAR MY FRIENDS~) (original: Matsuura Aya)
- [2010.10.13] Oshare My Dream / Elegant Girl (おしゃれ マイドリーム/エレガントガール) (Kitagami Mimi (Ogawa Mana) with MM Gakuen Gasshoubu / Himuro Ibu (Sugaya Risako))
Compilations / Other
- [2010.12.15] Hello! Project - Petit Best 11 (#10 Elegant Girl) (CV: Himuro Ibu)
- [2006.10.12] Risako amazon.co.jp
- [2007.07.20] pure+ amazon.co.jp
- [2008.02.06] Ring3 ~Rin Rin Rin!~ (Ring3 ~リンリンリンッ!~)
- [2009.11.27] Risou (梨想)
- [2010.03.24] Hello! Project BEST SHOT!! Haru (Tsugunaga Momoko, Sugaya Risako, Yajima Maimi, Suzuki Airi, Mano Erina)
-  Minimoni ja Movie Okashi na Daibouken! (ミニモニ。じゃム→ビ→お菓子な大冒険！)
-  Hotaru no Hoshi (ほたるの星)
-  Ousama Game (王様ゲーム) (as Shirokawa Mami)
- TV Programs
- [2002–2007] Hello! Morning (ハロー! モーニング)
- [2007–2008] Haromoni@ (ハロモニ@)
-  Berikyuu! (ベリキュー!)
- [2008–2009] Yorosen! (よろセン!)
- [2010–2011] Bijo Gaku (美女学)
- [2011–2012] HELLOPRO! TIME (ハロプロ！ＴＩＭＥ)
- [2011–] Kaette Kita Berryz Kamen! (帰ってきたBerryz仮面!)
- [2012–2013] Hello! SATOYAMA Life (ハロー！ＳＡＴＯＹＡＭＡライフ)
- [2014–] The Girls Live
- TV Dramas
-  Shonan Kawarayane Monogatari (湘南瓦屋根物語)
-  Japan Meat Information Service Center (日本食肉消費総合センター)
- [2009–2010] Gokujou!! Mecha Mote Iinchou (極上!!めちゃモテ委員長) (as Himuro Ibu)
-  Sengoku Jieitai (戦国自衛隊)
-  Cat's Eye (キャッツ・アイ)
-  Joshi Rakugo (女子落語)
-  Akasaka Dance Dance Dance (赤坂ダンスダンスダンス)
-  Idol Nihonryuu ~Onna Nichibu~ (アイドル日本流～おんな日舞～)
-  Warera Jeanne ~Shoujo Seisen Kageki~ (我らジャンヌ~少女聖戦歌劇~)
-  Sengoku Jieitai (ミュージカル 戦国自衛隊)
- [2009–] Tsuukai! Berryz Oukoku (痛快! ベリーズ王国)
- Is extremely good at Puyo Puyo, as shown in a 2006 appearance on Ongaku Senshi MUSIC FIGHTER, and was able to beat Kajiwara Yuuta in the game.
- At her initial Hello! Project Kids audition, she appeared with a broken arm.
- Was the youngest Hello! Project member to release a photobook at the time of releasing Risako.
- She and Natsuyaki Miyabi are the only Berryz Kobo members to have solo lines in all the group's singles to date.
- One time, a boy of her class confessed his love to her in front of everyone in the classroom.
- She said her favorite Berryz Kobo songs are "Himitsu no U.ta.hi.me" and "Heroine ni Narou ka!".
- Is good friends with Suzuki Airi, Mitsui Aika, and Kyarypamyupamyu.
- Has said she does not want to change her past, but only wants to change her future from now.
- She has a younger brother.
- S/mileage member Katsuta Rina and Hello! Pro Kenshuusei members Hamaura Ayano, Uemura Akari and Wada Sakurako look up to her.