OSAKA (AFP) - Japans Koki Kameda pulled off a technical knockout victory over Daniel Diaz of Nicaragua to defend his WBA bantamweight title on Saturday. Kameda , who sent the challenger to the canvas with a left hook in the eighth round, was declared as the winner when the referee stopped the fight before the final 12th round. Its been my dream to fight a world title match in my home town in Osaka. Its a great feeling to win it by a knockout, said Kameda , 24. It was Kamedas first defence since he won the vacant title, beating Alexander Munoz of Venezuela in December last year.