John Paul "Japs" Ricafranca Sergio (born August 20, 1979) is a Filipino musician and record producer.

When Kakoy Legaspi and Mike Elgar joined in May 2001, Sergio was officially absorbed and the band began recording for "Tuloy ang Ligaya".

[4][5] On 2013, the band released their first song "Aling Pag-ibig Pa" as a part of the compilation album Rock Supremo, a 150th birth anniversary that aims to honor the life and legacy of Andres Bonifacio.

[14] His older brother Andrew Ryan Steve "Dok" Sergio (born February 27, 1976) is the bassist of his other band, Daydream Cycle and the Ely Buendia-led Pupil.

Sergio graduated from De La Salle University–College of Saint Benilde in 2000 with a degree in AB Human Resources Management.