Floyd Mayweather vs. Tenshin Nasukawa Rules Revealed For RIZIN 14 Exhibition Match

The rule set of the Floyd Mayweather vs. Tenshin Nasukawa exhibition match set to take place at RIZIN 14 on Dec. 31 has finally been announced.

Mayweather’s Swanson Communications public relations team released the rules Thursday, which state the bout will be straight boxing rules with three rounds of three minutes each, and both fighters will wear 8-ounce RIZIN gloves with the weight limit being 147 pounds. Nasukawa has usually competed at 121 pounds, according to MMA Fighting.

As it's an exhibition match, it will not go on either one's professional boxing or MMA records, nor will there be any judges. However, it will still be a full contact competition.

Mayweather and Nasukawa were at the former's boxing club in Las Vegas on Thursday for a media day. The 20-year-old RIZIN star, unbeaten in kickboxing and MMA, worked out for the reporters who had gathered -- many hailing from Japan.

As per the release, the unbeaten Mayweather, who will be competing in Japan for the first time, is excited to put on a show.

”I love competing against fighters from all walks of life like in my amateur days,” Mayweather said. “It’s all about entertainment. Nine minutes of entertainment. It’s going to be amazing. I’m in the entertainment business. That’s what I go out there to do. I love to do this. I’m working out to put on a show for three rounds."

Nasukawa, meanwhile, is looking to make a name for himself, having already caught the eye of many casual fans during his impressive TKO win over Taiki Naito at RISE 129 last month.

He has also been sparring with former boxing lightweight champion Jorge Linares, who notably fought pound-for-pound king Vasyl Lomachenko earlier this year.

"There’s never been a Japanese fighter to face Floyd Mayweather in the ring,” Nasukawa added. “As an athlete, this is something that’s a great honor and a challenging task. I’d like to make a big impression.”

The fight was first announced early last month in a press conference in Japan, though Mayweather would later deny having any official agreement, at least for a professional fight. However, it would be back on again soon as it was clarified by both Mayweather and RIZIN that it would be an exhibition fight, though the rules were not clear until now.

“I’m moving around with the guy for nine minutes, and of course it’s gonna be the highest paid exhibition ever,” Mayweather told TMZ late last month. “It’s a no-brainer. Just because I’m retired from boxing, I still make appearances worldwide and make a ton of money.”

RIZIN 14 takes place at the Saitama Super Arena in Saitama, Japan.

The card also includes a rare cross-promotional champion vs. champion fight between RIZIN's Kyoji Horiguchi and Bellator bantamweight champion Darrion Caldwell for the inaugural RIZIN bantamweight championship.