Risa Niigaki
In early 2007, Iida was chosen to be a member of —a unit created to celebrate Morning Musume's 10th anniversary as a group. Morning Musume Tanjō 10nen Kinentai also consists of Natsumi Abe, Maki Goto, Risa Niigaki and Koharu Kusumi. Their first single, , was released on January 24, 2007.