Kōichi Yamadera
, better known by his stage name of Afra, is a Japanese beatboxer from Suita, Osaka. He formed the beatboxing band Afra &amp; Incredible Beatbox Band in 2005 with Kei and K-Moon. He had a guest appearance alongside Kōichi Yamadera in the eighth episode of the anime "Samurai Champloo" as the voice of the beatboxing Shinpachi.