I found them on Youtube a long time ago. All the titles were almost completely in Japanese, but a few of them had the word "ZETTA" in them. The group's front-man was this guy in a suit wearing a horse mask on his head who would yell in Japanese and make strange sounds to this ambient track. There were also usually a couple women who would do strange erotic stuff like pour hot wax on their thighs. One of the videos involved a girl being tied in bondage after she put a small vibrator into... you know, and then she wailed on this guitar and screeched until she fell on the floor exhausted.
Very droning, ambient tracks to live drums and sometimes guitar. It seemed to be politically influenced because the horse-headed guy could be seen out in the street in some videos yelling and waving flyers around, and he always seemed really angry about something.
Yeah, so wtf was it? Anyone have any idea? The videos were taken off of Youtube a while ago, as far as I know.
Sounds like something I want to see.