 He was later promoted to full champion after reigning champion Masamori Tokuyama vacated his title on December 6, 2006, in anticipation of retiring.In 2007, he defeated Katsushige Kawashima in a rematch via a tenth round knock out.On April 14, 2007, Mijares defended his title by beating two time Light Flyweight Champion Jorge Arce by unanimous decision in a particularly bloody match for Arce, who saw his first defeat since 1999.