 On March 24, 2008, she participated in the opening party of Channel Café, a channel broadcasting simulator event, at Roppongi Hills, Tokyo.From April 2008, Oshima appeared regularly on the Movie Plus navigating show, "Plus Style".On February 21, 2009, she announced that she would be leaving AKB48, and, on April 26, she gave her final performance at NHK Hall.