Born in Hondarribia (Gipuzkoa – Basque Country) in 1949. He was a choir singer since childhood. In his youth he was a member of various rock and folk music groups.

Graduated in Medicine from the Valladolid University, practising his profession nowadays. He works as family doctor in Lezo (Gipuzkoa).

Autodidactic musical education. He was initiated into choir conducting by Maestro Erwin List.

During his university period, he became conductor of Ederki Basque students’ choir in Valladolid (1971-1976), starting to write his first choral songs. Third prize in Tolosa (1975).

Founder-Conductor of  Eskifaia Choir in Hondarribia (1978-1994), winning first prizes in Ejea de los Caballeros, Tolosa, Avilés , Tours (France), Gorizia (Italy), Spittal an der Dräu (Austria), Mainhausen and Marktoberdorf (Germany).

Founder-Conductor of Kanta Cantemus Korua (1995), in Gipuzkoa. First prizes in Tours, France 1997 – 2007 and Tolosa  1999.

Composition prizes in Bilbao, Igualada, Madrid and Tolosa. His scores are being published in Basque Country (bustovega), France (A Coeur Joie), Great Britain (Oxford University Press), Germany (Carus Verlag and Ferrimontana), Sweden (Gehrmans Musikförlag) and USA (Walton, Alliance Music Publishing and Santa Bárbara).

Javier Busto is nowadays in demand throughout the world as a guest conductor and as a member of the jury in choral and composition contests. He has been requested in Argentina, Australia, Belgium, Canada, Croatia, France, Germany, Hungary, Italy, Japan, Netherlands, Norway, Spain, Sweden, USA and Venezuela.

Member of the technical committee of Tolosa choral contest.