April 21, 1997 (age 16)
Takagi Sayuki (高木紗友希) is a Japanese pop singer signed to Hello! Project. She is a member of Hello! Project as a Hello! Pro Kenshuusei and Juice=Juice member. She was first introduced at the Hello! Project 2009 Shinjin Kouen 11gatsu ~Yokohama Fire!~ concert on November 23, 2009.
On November 23, she was announced at the Hello! Project 2009 Shinjin Kouen 11gatsu ~Yokohama Fire!~ concert alongside Tanabe Nanami to be joining Hello! Pro Kenshuusei, a program where young girls recieve vocal and dance lessons in hopes of someday becoming a full idol in Hello! Project.
She participated in the S/mileage 2nd generation auditions, but failed.
Takagi also participated in the stage play Reborn ~Inochi no Audition~ as Kounotori.
In June, Takagi participated in the Morning Musume 11th Generation ~Suppin Utahime~ Audition, but failed.
Takagi participated in ℃-ute Concert Tour 2012 Winter ~Shinseinaru Pentagram~ as a back-up dancer.
On February 3, during the Bravo! concert in Fukuoka, it was announced that Takagi will debut in a new unit, Juice=Juice, alongside Miyamoto Karin, Kanazawa Tomoko, Miyazaki Yuka, Otsuka Aina, and Uemura Akari. They will start off as an indies group and begin activities soon.
On February 23, Takagi participated as a back-dancer at Mano Erina's graduation concert.
- Name: Takagi Sayuki (高木紗友希)
- Nickname: Sayubee (さゆべえ)
- Birthdate: April 21, 1997 (age 16)
- Birthplace: Chiba, Japan
- Height: 156cm
- Blood Type: A
- Western Zodiac: Taurus
- Hello! Project Status:
- Juice=Juice Color: Lemon
- Scared of: Earthquakes
- Hobbies: Singing songs
- Specialty: Self-learning kung-fu
- Favorite Hello! Project Song: Shabondama
- Looks Up To: Tanaka Reina, Kanazawa Tomoko
- Hello! Project groups:
Singles Participated InEdit
-  Gekijouban Hontou ni Atta Kowai Hanashi 3D (劇場版ほんとうにあった怖い話3D)
- [2010.04.24] Asonde Manabu (アソンデマナブ)
- [2010. 12] Tokidoki Mayomayo (時々迷々) (Mini-drama "Uso・Uso・Uso" (ウソ・ウソ・ウソ) )
-  Suugaku♥Joshi Gakuen(数学♥女子学園)
-  Coco Smile 6 (ココ・スマイル6)
-  Ima ga Itsuka ni Naru Mae ni (今がいつかになる前に)
-  Reborn ~Inochi no Audition~ (リボーン～命のオーディション～) (as Kounotori)
- [2013.4.16~] Hello! Pro Kenshuusei no Tadaima Kenshuuchuu!
- She has an older and younger sister.
- She gave valentine chocolate to Tanaka Reina.
- On a rainy day she would watch Hello! Project live DVDs, or sing the song "Umbrella" by Tanpopo#.
- She participated in the S/mileage auditions, but failed.
- She participated in the Morning Musume 11th Generation Audition, but failed.
- She has been a back dancer in various concerts for Mano Erina.
- Her best sport is swimming.
- In the dance-cover unit Team Okai, she covers Ikuta Erina.
- She filled in for Otsuka Aina in Kanojo ni Naritai!!! when Otsuka injured her ankle.
- She was a back-up dancer for ℃-ute Concert Tour 2012 Winter.
- Tsunku commented on her: "Her singing is rock-type and her dancing is powerful; you'll get the feeling that she's the Hello! Pro Kenshuusei from her high skill level."
- She says the source of her energy is looking at photos of Tanaka Reina.
- Outside of Hello! Project, she likes the bands SPEED and Kobukuro.
- She has a good relationship with Morning Musume member Fukumura Mizuki.
- She said her favorite member in Morning Musume is Tanaka Reina.
- She says her Oshimen in Hello! Pro Kenshuusei is Kanazawa Tomoko.