In July of that same year, she made her debut as one of Onyanko Club's lead singers with the song Don't Make Me Take Off My Sailor Suit (セーラー服を脱がさないで, Sērāfuku o Nugasanai de).
After graduating from high school, she continued working in the entertainment field and signed with the talent management firm Bond Planning (株式会社ボンド企画, Kabushiki Kaisha Bondo Kikaku).
She made her solo debut on January 1, 1986, with the hit single Winter Opera Glasses, which reached number one on the Oricon charts and sold over 300,000 copies.
On December 5 that same year, the newly reunited members performed the title song as well as Don't Make Me Take Off My Sailor Suit during the 2002 FNS Kayōsai event on Fuji TV.
Takashi Okamura, one half of the comedy duo Ninety-nine, is a huge fan of Nitta, and she performed in the "Uta no Onēsan" (歌のお姉さん) section of his Tobukusuri variety show.
In 2007, she participated in the ōendan for the inauguration of the Kama Burning Heroes, a baseball club started by Rakyō Ide, an owarai performer and member of the talent group Takeshi Gundan.