Japan's Kosei Tanaka won the vacant World Boxing Organization (WBO) junior flyweight title by knocking out former world champion Moises "Moi" Fuentes in the fifth round on Saturday afternoon in Japan, midnight on Friday in the United States.

The stellar bout was part of a New Year's Eve card that was staged at Memorial Center, Gifu, Japan.

Tanaka appeared stronger and more accurate in his combinations that were tagging Fuentes. The Mexican veteran was taking punishment round after round, until the fifth when he was sent to the canvas due to the incoming bombs that kept firing away from Tanaka. The end of the bout occurred at 1:52 minutes of that fifth round.

With this victory, Tanaka entered his name in the history books because he added his second world title just in his eighth professional fight.

In just his fifth fight, Tanaka won the WBO minimumweight title by beating another Mexican fighter, Julian Yedras. He defended that title on only one occasion and then proclaimed that he was going for more gold, dropped his title and announced that he was now a full-fledged 108-pounder.

His record improved to 8-0, with 5 knockouts, but even more impressive is that he is barely 21 years old. Fuentes, meanwhile, saw his pro record drop to 24-3-1, with 13 knockouts.