Takeuchi passed AKB48 auditions in 2009. While she was a trainee, she was part of the sub-unit Mini Skirt and released the song "Mini Skirt no Yōsei" to promote the arcade game Pretty Rhythm: Mini Skirt, which later featured a likeness of her as a playable character during the Season 2 update. She was promoted to full member status in 2010, and was announced as a member of AKB48's newly formed Team 4 in 2011.
Takeuchi signed to OH Enterprise in 2012. Later that year, Team 4 was disbanded, and Takeuchi was moved to AKB48's Team B. During this time, Takeuchi uploaded home recordings of song covers on social media. In 2014, she began to post song covers on her YouTube channel.
Four days after the Produce 48 finale, on September 4, 2018, Takeuchi announced her departure from AKB48. Her last performance with AKB48 took place on December 25, 2018, and her contract with OH Enterprise ended on December 31, 2018.
On October 22, 2019, Takeuchi released her first solo single, as well as her first Korean single and first single in Mystic Story, titled "My Type" (내 타입) as part of Mystic Story's CEO Yoon Jong Shin's Yoon Jong Shin Monthly Project 2019.
|2019||Yoon Jong Shin Monthly Project 2019: October|
(with Junichi Inagaki)
|2015||A Man and A Woman 5|
|"Kimi ni Todoke"
|"Baby I Love U"
|"Manatsu no Sounds Good!||2012||Tsugi no Ashiato|
|"No Way Man"||2018||Non-album single|
|"Nekkoya (Pick Me)"
(Produce 48 theme song)
|"See You Again"||30 Girls 6 Concepts|
|"We Together"||Produce 48 – Final|
|2012||Shiritsu Bakaleya Koukou||Nozomi Yuusa|||
|2014||Nemurihime: Dream On Dreamer||Hiiragi|||
|2012||Majisuka Gakuen||Miyu||TV Tokyo||Season 3|
|2010–2018||AKBingo!||Herself||Nippon TV||Variety show regular|
|2011–2017||AKB48 Nemousu TV||Herself||Family Gekijo||Variety show regular|
|2013–2018||AKB48 Show!||Herself||NHK||Variety show regular|
|2018||Produce 48||Herself||Mnet||Reality competition show|
|2010||Pretty Rhythm: Mini Skirt||Miyumiyu||Season 2|
|2013–2015||AKB48 Konya wa Kaeranai ("AKB48 Not Going Home Tonight")||Host (with Karen Iwata, Tomu Muto)||Chubu-Nippon Broadcasting|