There are four artists named ON/OFF:

for JAPANESE band CORRECT TAG to: ON／OFF
1) ON／OFF is a Japanese band comprising of twins Naoya & Kazuya Sakamoto (坂本直弥 and 坂本和弥). They performed in the drama "Fuuma no Kojirou" and also performed its ending song "永遠の刹那"; the opening theme of the anime Vampire Knight, "ふたつの鼓動と赤い罪", is their second and more mainstream single.

2) English On/Off is an alias of UK electronica duo Posthuman.

3) On/Off: Patrick Shaw-Iversen & Raymond Pellicer
Fresh out of Oslo’s much-talked about “Grüneløkka” scene – where jazz and electronics meet in sweet harmony…On/Off are a perfect example of the Jazzland manifest – taking “purist” ECM jazz traditions on a timely ride in to the future, one foot in the alternative dancefloor – the other in the stratosphere. Patrick, well-travelled flautist, much in demand with the key players in the Norwegian Jazz scene – he has played world-wide with the likes of Bugge Wesseltoft, Sidsel Endresen, Audun Kleive, and Nils Petter Molvær. His unique Javanese and Balinese gamelan influence a perfect balance to partner Raymond’s electronics. Raymond, aka Dj Darknorse, Phono etc – is perhaps best known for his involvement as a major force in the Nils Petter Molvær “Khmer”…touring world-wide at leading jazz festivals and happenings, bringing his minimlistic tech-trickery to Nils Petter´s recordings and massive live experience. It would only be a matter of time before the two would hook up, aided and abetted by Dj Strangefruit, - Norway’s Dj “eminence grise” – also of Nils Petter´s band.
source: Jazzland Recordings

4) on/off Jalisco, Mexico An electronic minimalist artist. Risen from the underground (i.e. no label) Jorge Jimenez has released seven albums that kick ass! Read more on Last.fm. User-contributed text is available under the Creative Commons By-SA License; additional terms may apply.