Floyd Mayweather, the 41-year-old undefeated boxing legend, is scheduled to fight on New Year's Eve in Japan in the Rizin Fighting Federation, the MMA promotion announced at a press conference Monday in Tokyo (Sunday night in the United States).

Mayweather, who was present at the press conference, will take on 20-year-old kickboxer Tenshin Nasukawa at the Saitama Super Arena.

At this point, though, it's not very clear what this fight will look like. Ariel Helwani of ESPN reported that "Everyone I’ve talked to said they’d be shocked if it’s MMA."

Mayweather himself expressed a similar sentiment.

"We'll talk about that, we'll get that situated within the next couple weeks," Mayweather said when asked at the press conference about the fight's weight class and the rules.

"We're giving the people something they've never seen before," Mayweather went on to say.

"As far as the weight class, we're not really worried about that. When it's all said and done, it's all about me going out there displaying my skills against another skillful fighter. So we both want to go out there and display our skills and give people excitement"

Nasukawa, Mayweather's opponent, is himself a perfect 27-0 in kickboxing competition.

When we last saw Mayweather in action, he was defeating UFC star Conor McGregor in "The Money Fight" to move his boxing record to 50-0.