Kazuto Ioka retained his World Boxing Organization super flyweight title via unanimous decision over Donnie Nietes, with the Japanese fighter avenging an earlier loss in a title rematch with his Filipino foe in Tokyo on Wednesday.

The 33-year-old Ioka defended his WBO title for the fifth straight time with a clinical performance against a dangerous and highly experienced opponent at Ota City General Gymnasium.

"It means a lot to get my revenge against the same opponent I lost to three years, seven months ago in Macau," Ioka said.