Dokaka is a Japanese beatboxer who performs music solely by multitracking his own voice, generally with one instrument per track. (That is, he records himself mimicking the bass part to a song, then records himself mimicking the drum part in sync with the first recording, and so on.) He has distributed his recordings primarily as free downloads from his website; these include interpretations of works by King Crimson, Led Zeppelin, Wes Montgomery, Slayer, the Rolling Stones, and Miles Davis, among many others. He largely records covers of heavy metal, prog, jazz and videogame theme music, though he has also written and recorded original songs. Dokaka also appears on Björk's Medúlla (2004) and the soundtrack to the video game We ♥ Katamari (2005). In 2008 he released his first full length album 'Human Interface' in Japan. In 2009 it was released in Australia by Dual Plover.