Floyd Mayweather's last fight was against UFC's Conor McGregor and earned him in excess of $100 million dollars, while Nasukawa last fought and won against Kyoji Horiguchi in the main event of RIZIN. He has not fought since coming out of retirement to defeat Conor McGregor in a boxing bout past year.
Mayweather had teased a move into mixed martial arts for some time, both as a rematch with McGregor and as a potential superfight against undefeated UFC lightweight champion Khabib Nurmagomedov.
If Mayweather, one of the greatest fighters to ever step into a boxing ring, does decide to try his hand at something new, he will need protection from the more extreme elements of cage fighting if he is to make any impact. As a professional I haven't had a chance to go outside the United States to display my skills and to display my talent for the world'.
When asked when Rizin FF will finalize the details of the Mayweather vs. Nasukawa fight, Sakakibara could not give an immediate answer.
"I wanted to do something different".
Nasukawa, for his part, is relishing the chance to fight with Mayweather, admitting his surprise when he was offered the opportunity. He's now 41 years old.
"As far as the rule set and the weight and the rules, we still have some work cut out for us", Sakakibara said.
The shock announcement was made during a Rizin 14 press conference.
"I am pretty sure that when I speak with the guys from my team we are going to get on the same page so we can go out there and do what we have to do", he added.
He said: "It's the biggest moment in my life and I want to be the man who changes history".
'I have fought in the USA for all 50 of my fights.