José Javier Zubillaga Martínez (born 12 August 1959 in Logroño, La Rioja) is a Spanish retired footballer who played as a midfielder.
Zubillaga's father, Cesáreo (a native of San Sebastián), was a professional footballer who played for CD Logroñés in the Segunda Liga.
Javier began playing youth football with Logroño-based CD Berceo, before joining Real Sociedad.
Until 1987, year in which he helped the Basques conquer the Copa del Rey, he never played in more than 18 league matches, and left precisely in that summer.
He finally retired in 1991 at nearly 32, taking up coaching in the following decade, always in Segunda División B – he also worked with several clubs in directorial capacities from 1994 onwards, including hometown's CD Logroñés.