[4] In 1980, after applying to become a model for Seventeen magazine, Mita moved to Tokyo and later in October of that year, she was chosen to appear in a Sony commercial for cassette tape decks.

[6] On March 21, 1982, Mita debuted as an idol singer under the CBS/Sony Label and was produced by Masatoshi Sakai.

[9] Mita's third single, "Irozuku Machi" (色づく街, The Colorful Town), was released on October 3, 1982.

Her segment, called "Hiroko Loves Sweets" (寛子のおかし大好き, Hiroko no Okashi Daisuki) where she'd make sweets on a kitchen set in the studio, usually led to hilarious disasters and hijinx, and Mita became associated with having an airheaded personality.

[19][20] Mita continues to act in roles for television and film, yet also manages to take extended leaves from show business to tour along with her family's kabuki performances.

After the death of Mita's father-in-law in 2011, her husband has since been promoted as Nakamura Shikan VIII,[21] and all three of her sons have since debuted in the rien (professional kabuki theatre).