|Birth Day:||December 8, 1992|
|Birth Place:||Kyoto, Japan|
|Height||Weight||Hair Colour||Eye Colour||Blood Type||Tattoo(s)|
Yokoyama's first attempt to join AKB48 or a sister group was for SKE48's second generation, but her audition was unsuccessful. She later passed the auditions with AKB48, and became a ninth-generation kenkyusei (trainee) member on September 20, 2009. She was the first of her generation to be promoted, which took place at AKB48 Tokyo Matsuri on October 10, 2010, and where she became a member of Team K.
In 2011, she secured her first participation on an AKB48 single title track by placing 19th in the AKB48 general elections. Her first A-side single was "Everyday, Katyusha".
In 2012, she placed 15th in the AKB48 general elections.
In the AKB48 Tokyo Dome Concert in 2012, it was announced that Yokoyama would join NMB48 and therefore hold a concurrent position between AKB48's Team A and NMB48. In the same year in November, she sang on the A-side for NMB48's sixth single "Kitagawa Kenji".
In 2013, she placed 13th in the AKB48 general election and third in its rock-paper-scissors tournament. On April 28, 2013, NMB48 revoked her concurrency and she remained in AKB48.
On December 8, 2014, it was revealed that Yokoyama would succeed Minami Takahashi's job as the General Director of AKB48 after Takahashi's leaving. With the graduation of Minami Takahashi scheduled on April 8, 2016, she became the second "Soukantoku" on December 8, 2015 during the 10th anniversary stage of AKB48 Theater.
On March 31, 2019, Yokoyama stepped down from the position of General Manager and became a regular member. Mion Mukaichi officially assumed the title the next day. Yui Yokoyama's birthday coincides with AKB48's anniversary.
Currently, Yui Yokoyama is 29 years, 1 months and 12 days old. Yui Yokoyama will celebrate 30th birthday on a Thursday 8th of December 2022.
Find out about Yui Yokoyama birthday activities in timeline view here.