Project Kids auditions after performing "Dekkai Uchuu ni Ai ga Aru" by Morning Musume.

In 2004, Nakajima did not make the original list of Berryz Kobo and the idea was eventually dropped.

In October 2007, Nakajima was placed in the unit Athena & Robikerottsu along with fellow Cute member Chisato Okai, as well as Risa Niigaki and Aika Mitsui of Morning Musume.

Project Kids members Yurina Kumai and Risako Sugaya as well and Aika Mitsui from Morning Musume to be in a newly formed group Guardians 4 formed to sing the openings to the anime Shugo Chara!.

She was chosen to be in the 5th-generation Hello Project subgroup PetitmoniV, along with Mai Hagiwara and Erina Mano.