In 2009, Kojima won the Grand Prize from among the 33,910 people in the 34th Horipro Tarento Scout Caravan.

[3] In June 2010, Kojima is the manager of Horipro Entertainers Women's Futsal team Xanadu loves NHC.

Taking the opportunity, the agency came to serve also facilitator of professional boxing relay with a terrestrial television broadcasting rights in Japan.

On January 12, 2013, at the 21st All-Japan High School Women's Football Championship digest program and the relay program of the TBS production, Kojima was responsible for the main caster together with Masashi Nakayama (former Japan national football team player).

The same year on September 23, she was in the world Valley girls Italy tournament relay program of TBS production, with Motoko Obayashi, and was responsible for the studio MC along with the players.

The same year on March, Kojima married Kota Kitamura, a sauna businessman,[8] but her marriage was announced on May 19 during the press conference in a movie premiere.