Kazuhito Iwaike, known exclusively by his stage name K.A.Z, is a Japanese musician and songwriter. He is known for his work with Oblivion Dust, hide with Spread Beaver and Vamps.

Underworld is the fourth and final studio album by Japanese rock band Vamps, released on April 26, 2017 in Japan and April 28 internationally. The production took place in Henderson, Nevada with produ