No matter how one of the all-time best boxers views his New Year's Eve showdown with Tenshin Nasukawa, the kickboxing phenom is planning to shock the world by putting on a competitive fight.

With two weeks to go until his special three-round exhibition boxing match against superstar Floyd Mayweather Jr. at a Rizin 14 mixed martial arts event on Dec. 31 at Saitama Super Arena, Nasukawa insisted that he is getting prepared and gaining confidence.

"I've been able to absorb so many various different moves," said Nasukawa, who had just returned home from a two-week training camp in Las Vegas, at an open workout at Teppen Gym on Tuesday evening.