Japan's Junto Nakatani won his second WBC bantamweight title defense with a sixth-round technical knockout Monday, while compatriot Kosei Tanaka lost his WBO super flyweight belt in a split decision.In a world title tripleheader at Tokyo's Ariake Arena, Nakatani, ninth in Ring magazine's pound-for-pound rankings, started slowly against a fellow southpaw, Thailand's Petch Sor Chitpattana, before flooring him midway through the sixth round.A flurry of blows from Nakatani in the round's final seconds sent the Thai once more to the canvas, and the referee stopped the fight. Nakatani's record im…READ FULL ARTICLE