SEIKA (誠果) is a DJ, manipulator, saxophonist, and a member of UVERworld. He was origianlly part of the band but left before they debuted as UVERworld.
On March 26th, 2014, SEIKA was announced as the official 6th member of UVERworld. Before joining as an official member, SEIKA was simply just a DJ for UVERworld’s live performances.