Josetxo Grieta  Josetxo Grieta is a noise rock band formed in Bilbao in 2006. The members are Josetxo Anitua from the band Cancer Moon, Iñigo Eguillor from Gringo, and Mattin from Billy Bao, Deflag Haemorrhage/Haien Kontra, Sakada, and NMM. Josetxo Grieta publishes their music under the no-licence of Anti-copyright.