Yasutaka Nakata is bouncing around like some kind of postmodern electro Tigger in front of a sea of adoring fans, almost uniformly young, beautiful and well-dressed. His DJ set taken in large part from his group capsule’s own music, with the odd track thrown in by electro-tinged idol pop phenomenon Perfume (written and produced by Nakata), and earlier there has been a live performance by J-Pop sin