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 singer MEG, performing a set of songs also written and produced by Nakata. Freeze frame the moment and take a good look: This is Japan's most important producer at the peak of his powers.

Rewind a week and Nakata is sitting in a cafe in Daikanyama talking about the origins of capsule (it's always written with a small "c") and the group's forthcoming "best of" album "Flash Best."

Initially hailing from Kanazawa before moving to Tokyo, Nakata started making music when he was a high school student. He worked his way through a series of guest vocalists before settling on Toshiko Koshijima, whose easygoing attitude appealed to Nakata.