It has been rumored it will be along the lines of an "exhibition" between Mayweather and Nasukawa.
That victory improved his boxing record to a flawless 50-0 but the format or rules for his meeting with the baby-faced Nasukawa were not specified by the Japanese mixed martial arts promoters RIZIN. He is versed in full contact karate.
Mayweather posted a teaser photo on his Instagram feed at the weekend, showing him wearing kickboxing gloves.
And although still only young, Nasukawa's career has already been punctuated by some notable wins, defeating veteran and multiple-stadium champion Wanchalong PK.Saenchai with a first-round knock-out at the age of 18.
Nasukawa, who is described in the press release as "perhaps the best combat sports prospect (Japan) has ever seen", boasts a 27-0 record but has never competed as a professional boxer. Two months after downing Wanchalong, ex-IBF flyweight title-holder Amnat Ruenroeng was beaten.
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It can only be assumed that Rizin have thrown an astronomical amount of money at Mayweather to make this unlikely match-up happen, and at the presser, Rizing promoter Nobuyuki Sakakibara explained why the deal made sense for the company.
"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".
"I fought in the United States for all 50 fights but as an amateur I was able to travel and fight in Russia, Cuba and so many different countries".
Mayweather had previously talked about potential blockbuster fights with UFC lightweight champion Khabib Nurmagomedov and Conor McGregor and a potential rematch with Manny Pacquiao, but absolutely no-one saw this announcement coming.
Mayweather and Nasukawa have not yet agreed the rules of the bout, but there would be some appeal to a shift towards MMA away from the UFC spotlight.