WBO bantamweight champion Tomoki Kameda said Wednesday he is brimming with confidence ahead of his first world title defense against sixth-ranked challenger Immanuel Naidjala of Namibia at Osaka's Bodymaker Colosseum on Dec. 3.

Tomoki, the youngest of the three Kameda boxing brothers, said if Naidjala goes with an out-boxing plan, he'll be ready. If he wants to brawl, bring it on.

"If he's circling, I can chase him down. If he wants to slug it out, I'm fine with that," said Kameda, after putting in about one hour of training in a practice open to the media.

Naidjala is childhood friends with Namibia's Paulus Ambunda, whom Kameda defeated to wrest the WBO crown in the Philippines in August.

Naidjala said that Ambunda's defeat was of no consequence and he isn't viewing the fight as revenge.