WBC bantamweight champ, unbeaten southpaw Japanese Shinsuke Yamanaka (22-0-2, 16 KOs), 118, successfully kept his belt as he floored official challenger Suriyan Sor Rungvisai (37-6-1, 16 KOs), 117.25, from Thailand, three times to win a unanimous decision (114-110, 116-108, 115-109) over twelve hard-fought rounds.