OOIOO are YoshimiO, Mishina, kAyAn, and AYA.

OOIOO was founded by YoshimiO in 1995. The members came together as musicians who move freely between the audible and inaudible, rhythm and non-rhythm, noise and silence. The music they create is a collection of the moments and essence of their favorite sounds that they captured, as they come into being until they disappear into the ether. Just as each cell in the body consists of a microcosm of its own, the vibrations of each of the members resonate together to create a new life form.