Cebu-bred Ilongo bomber Rev The Gentle Giant Santillan together with his trainer Brix Flores will leave for Japan today for his forthcoming Oriental and Pacific Boxing Federation (OPBF) welterweight title defense against veteran Japanese fighter Kazuhiko Hidaka this Saturday at Tokyos famed Korakuen Hall. This will be Santillans second defense since the WBC ranked No.7 welterweight contender reg…