The 34 year-old seemed to have aged almost overnight as he never got in the fight and was put down in the first, third and sixth rounds before the referee called a halt to the bout with Wonjongkam in no position to continue.
Rizal-based Jaro, 29, who had ten losses on his record in 48 bouts going into the fight, went into the bout an overwhelming underdog but is now a world champion for the first time after two failed attempts previously.
