OOIOO is a group founded by Boredoms drummer (and occasional trumpeter and vocalist) Yoshimi P-We.{{cite web|last=McCarthy |first=Kieran |url=

According to AllMusic's Kieran McCarthy "It's next to impossible to describe their sound, because -- by design -- it rarely follows consistent patterns". Some of their music has been described as having "a majestic ebb and flow that suggests natural wonders"{{cite web|last=Phares |first=Heather |url= or a "witchy, tribal side". Either way, at any one time it may incorporate chanting and punchy drums, dancey polyrhythms atonal composition or psychedelia.