Fermin Muguruza (Irún, Guipúzcoa, Spain) is a Basque nationalist rock musician, singer, songwriter, producer and record label manager. In addition to his career in music, he stood for the European Parliament elections in a low position on the Herri Batasuna list (he was not elected). He is the brother of musicians Iñigo Muguruza and Jabier Muguruza and is one of the personalities interviewed for the documentary film The Basque Ball (2003). Music career and socio-political views Muguruza has taken part in more than twenty albums, and is one of the most important artists from the Basque Country. In 1983 he founded a fusion ska punk band called Kortatu with his brother Iñigo and drummer Treku Armendariz, among the first to popularise ska in Spain. In 1988 the group disbanded, but Fermin and Iñigo would come together again in 1990 to create Negu Gorriak, along with Kaki Arkarazo, who had produced Kortatu's last records.