Kosei Tanaka won the WBO minimumweight crown on Saturday in his fifth pro fight, defeating Julian Yedras of Mexico by unanimous decision.(more)Kosei Tanaka showed a brilliant performance in the first world title shot in his fifth professional bout, accomplishing Japan's record of winning a world title in the shortest distance of boxing career. In fighting an experienced No. 1 contender in the WBO minimumweight ranking, Tanaka was excellent even in a phone-booth slugging by landing sharp uppercuts, staggering Yedra several times. Yedra was unable to connect strong punches in later rounds since he was damaged by fast and crisp combinatios thrown by Tanaka in early rounds.