- Name: Shimizu Saki (清水佐紀)
- Nicknames: Captain (キャプテン), Cap (キャプ), Shimihamu (しみハム)
- Birthday: November 22, 1991
- Birthplace: Zama, Kanagawa, Japan
- Blood type: O
- Height: 153cm
- Hobbies: Shopping, eating ice cream
- Hello! Project groups:
Shimizu Saki joined Hello! Project in 2002 as a member of Hello! Project Kids after passing the group's audition. In 2003, she was a member of the special unit ZYX. In 2004, she was one of eight members selected to form Berryz Kobo and became the group's captain. She is one of the group's main singers. In 2008, Shimizu became part of the unit High-King.
On February 25, 2015 Shimizu Saki announced that after the indefinite hiatus of Berryz Kobo took effect she would officially become a Hello! Project Advisor, which would include acting as a liason between the members of Hello! Project and management. Her first job in the role of Advisor was assiting in the selection of a name for the new group consisting of Kenshuusei members; the group later became Kobushi Factory.
On August 24, 2017 it was revealed through an official announcement and Saki's blog that she had joined the M-Line fan club and would make her return to performing through one of several events meant to celebrate Hello! Project's 20th anniversary. Though the contents of her performance were undecided at the time of the announcement, the event was titled "Shimizu Saki DanceLive ~I wish I could...~".
- Click here for Berryz Kobo releases
- [2011.01.12] SAKI
- [2011.01.12] Shimizu Saki (清水佐紀)
-  Koinu Dan no Monogatari (仔犬ダンの物語) (as Nomura Chika)
-  Promise Land ~Clovers no Daibouken~ (Promise Land ~クローバーズの大冒険~)
-  Futari wa Pretty Cure Max Heart 2 Yukizora no Tomodachi (ふたりはプリキュアマックスハート2 雪空のともだち)
-  Ousama Game (王様ゲーム) (as Matsumoto Masami)
- 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
-  Suugaku♥Joshi Gakuen (数学♥女子学園)
-  Inazuma Eleven (イナズマイレブン) (voice of Hori Michiko)
-  Michishige Sayumi no "Mobekimasutte Nani??" (道重さゆみの『モベキマスってなに？？』)
-  UP-FRONT CHANNEL Recommend
-  Taishou Roman Haikara Tantei Aoi Ruby Satsujinjiken (大正浪漫ハイカラ探偵王青いルビー殺人事件)
-  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)
-  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)
-  Ichimai no Ticket ~Beatles ga Yattekuru!~ (一枚のチケット~ビートルズがやってくる!~)
-  Nettai Danshi (熱帯男子)
-  Pharaoh no Haka ~Hebi Ou Senferu~ (ファラオの墓 ~蛇王・スネフェル~)
-  Sayonara Shika House (さよなら鹿ハウス)
-  Harukanaru Toki no Naka de 6 Gaiden ~Tasogare no Kamen~ (遙かなる時空の中で６ 外伝 ~黄昏ノ仮面~)
- [2004–2009] Berryz Kobo Kiritsu! Rei! Chakuseki! (Berryz工房 起立! 礼! 着席!)
- [2009–] Berryz Kobo Beritsuu! (Berryz工房 べりつぅ!)
- Has an older brother.
- Her favorite artist is SMAP.
- Collects hand-written letters from members and classmates, and prefers getting hand-written letters as opposed to e-mail or text messages.
- Has played the piano since kindergarten.
- Loves pigs, and collects pig-related merchandise.
- Is the second oldest member of the Hello! Project Kids.
- When she was younger, she was the shortest member of Berryz Kobo, and usually mentioned that fact when introducing herself. Currently, the shortest member is Tsugunaga Momoko.
- Is considered to be one of the best dancers in all of Hello! Project, often being associated with her seniors in sub-groups that mainly focus on dance.
- Is the only leader of a Hello! Project group to go by a different title.