コープスパーティー
On 26 February 2015, it was revealed that Ikoma will star in a live-action film based on the "Corpse Party" series of video games. Exactly a month later, on 26 March, it was announced that she would leave AKB48. On Nogizaka46's 12th Single "Taiyō Nokku" released on 22 July 2015, Ikoma returned as the group's center from her concurrent position in AKB48, last holding position zero on their 5th Single "Kimi no Na wa Kibō" two years prior.