After seeing an audition notice for the junior fashion magazine nicola, her sister sent in Yui's profile and she auditioned, winning a Grand Prix award. She became a nicomo, a model for the magazine. By 2001, her fellow nicomo, Ayako Enamoto, nicknamed her Gakky.
Aragaki expanded her modeling career into gravure in 2004. She also appeared on variety shows and commercials, her commercials for Pocky being most popular. A year later, she officially graduated from the magazine. During the same year, she acted in the TBS drama, Dragon Zakura, alongside fellow Japanese idol, Tomohisa Yamashita and actress Masami Nagasawa. This was her breakthrough performance. Since then, Aragaki has been cast in various dramas like Kanojo no Koibumi, Gal Circle and My Boss, My Hero. Despite the expiration of her contract with 'nicola', she still appears in the magazine occasionally. She currently holds the record for appearing the most number of times as its cover girl.
In 2007 she started the year with a movie, Waruboro, with Shota Matsuda and Yuu Shirota. Afterwards she was cast alongside Hiroshi Tachi and Shigeaki Kato in TBS' summer drama, Papa to Musume no Nanokakan. Aragaki plays a high school student who exchanges bodies with her father, a middle-aged salaryman.
To date, Aragaki has won five Newcomer awards for the movies Waruboro, Tokyo Serendipity and Koizora/Sky of Love. Her fifth award was in honor of her role in the ¥3.6 billion-grossing movie, Sky of Love. 
She also released two singles in 2008, Make my day and Akai Ito. Make my Day was used in the NHK drama Hachi-One Driver, while Akai Ito is a cover of a song written and performed by Kobukuro during their indie days, in commemoration of the duo's tenth anniversary in the Japanese music industry.
In August 2008 Aragaki' played intern Megumi Shiraishi in the medical drama Code Blue: Doctor Heli Kinkyuu Kyuumei, with Tomohisa Yamashita and Erika Toda. At the same time she made the movie Fure Fure Shojo.
|2005||Onna no Ichidaiki!|
|2006||Kanojo no Koibumi|
|2006||My Boss My Hero|
|2007||Papa to Musume no Nananokan|
|2010||Code Blue 2|
|2007||Koisuru Madori (Tokyo Serendipity)|
|2007||Koizora (Sky of Love)|
|2008||Fure Fure Shojo (Cheer Cheer Cheer!)|
|2009||Ballad: Namonaki Koi no Uta (Ballad)|
|2006||Digimon Savers||Anime series||Yoshino Fujieda|
|Digimon World Data Squad||Video game||Yoshino Fujieda|
|Sgt. Keroro||Anime film||Mirara|
- Daio Paper - Elleair (2003)
- Seika - Meiji (2005)
- Senoby - JT Beverage (2005)
- NTT East (2005-current)
- Pantene - Procter & Gamble (2006-current)
- Dailies Aqua - Ciba Vision (2006)
- Pocky - Glico (2006-current)
- Townwork - Recruit (2006-current)
- Japanese Red Cross (2007)
- Uniqlo (2007)
- Mitsuya Cider - Asahi Soft Drinks (2007)
- Green Tea - Asahi Soft Drinks (2009-current)
- Sony Walkman - S series (2009-current)
- Tokyo Metro - Tokyoheart (2010)
- Chura Chura
- Koisuru Madori
|Release||Title||Oricon Single charts peak positions and sales||Album|
"Make my day"
|Release||Title||Oricon Album charts peak positions and sales|
- 61st Television Drama Academy Awards: Best Supporting Actress for Smile
- 13th Nikkan Sports Drama Grand Prix (Spring 2009): Best Supporting Actress for Smile
- Yui Aragaki ranked number 1 in Under 20 Japanese Idol - Scholar Idol Ranking 2007
- Yui Aragaki best girl 2007 - Japan
- Oricon: ideal women - Tokyograph
- Oricon: best face - Tokyograph
- Yui Aragaki to debut at Budokan - Tokyograph
- Official Site - LesPros Entertainment Company (Japanese)
- Official Site - Warner Music Japan (Japanese)
- Template:Title without disambig at the Internet Movie Database