Yoji, often styled as YOJI according to official publications, (formerly known as Yoji Biomehanika with aliases such as Mutant DJ, Ozaka Oz, Bionico, Biomehanika and The Arcade Nation) is a Japanese trance/hard trance DJ. He is characterised by his striking clothing style, manner of entertaining behind and in front of the turntables, and style which he calls "Tech Dance". His residency at GIGA in Japan has also given him a big following in his home country. Yoji has also played at events in the US, including Southern California's Electric Daisy Carnival in front a crowd measured in the tens of thousands.