Adesanya, 26, comfortably won his first two fights to progress to the final against Jamie Eades (Auckland), before outclassing Eades in the final to win on points. Eades had earlier defeated Rotorua's Joel Marsters in the opening round.
Adesanya, who now boasts a record of more than 40 wins and only two losses as a kickboxer, said his victory was dedicated to a close friend, Jamie Van Der Kuijl, who tragically died recently in a farming accident.
"The last fight I fought with emotion so I was not at my best," he said.
"I have too many belts already so this one is for Jamie."
Never short of confidence, Adesanya entered the ring with a superhero cape before each bout , and said he had become accustomed to winning: "Winning is a habit and I'm used to winning."
Incredibly, he will hop back into the ring tomorrow during the televised Super 8 Fight Night boxing event being held at Auckland's Skycity.
While Adesanya will be competing in the four-man cruiserweight tournament at the event, other fights on the card include the likes of league players Paul Gallen from Australia and Warrior Bodene Thompson fighting one another.
The Super 8 Fight Night boxing event is being shown live on Sky Sports tomorrow night from 7pm.