|  Joji Biomehanika  |  Yoji  |  Yoji Biomehanica Yoji Biomehanika  (also known as Yoji Mabuchi, Mutant DJ, Ozaka Oz, and Bionico) is a popular  Japanese trance / hard trance   DJ . Characterised by his striking clothing style and manner of entertaining behind and in front of the turntables, he is