Wikipedia
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 Katamari wa Damacy, the soundtrack to the video game We Love Katamari (2005).
On May 23, 2006, the artist's website, dokaka.com, was hacked and vandalized by a criminal hacking group claiming to be from Turkey.
Dokaka performed a rare concert with other vocal artists at Atlantic Waves music festival on November 30, 2006, in Union Chapel, Islington London.