Takeuchi Akari joined Hello! Project as a member of Hello! Pro Kenshuusei in 2008.
In June 2009 Takeuchi took park in the stage play "Ojigi de SHAPE-UP!", the sequel to "Ojigi 30 do Degrees", with fellow Hello! Project members Miyamoto Karin, Takahashi Ai, Michishige Sayumi, Tanaka Reina, and Kamei Eri.
She is a member of the revival group of Minimoni.
She auditioned for S/mileage and made it in along with fellow Hello! Pro Kenshuusei member Katsuta Rina.