The Japanese fighter stumbled to his feet and tried to get his jab working, in a desperate attempt to stop Mayweather's forward march.
"I'm still retired", Mayweather said during a post-exhibition interview.
Mayweather's comments pretty much killed talk of him being interested in fighting the victor of the January 19 bout between Manny Pacquiao, whom Mayweather outpointed in May 2015, and Adrien Broner.
The size difference was readily apparent between the two as Mayweather was the taller, bigger, and longer boxer. Tokyo, Japan you guys are wonderful I want to say thank you.
Australia v India: Tourists build up third Test lead in Melbourne
The Australian spectators for the first two days of the Test match constantly chanted racist comments against the Indians. Bumrah claimed career-best figures of 6/33 in the Boxing Day Test to accumulate 45 Test wickets in 2018.
It was an unexpected turn of events, and the rule set was even more freaky. We had fun but I want to thank God for this unbelievable turn out. Nasukawa's corner throws in the towel before he can take any more damage. Nasukawa, however, barely landed a clean punch against the vastly more experienced Mayweather. I'm still retired and this was just entertainment.
As for Nasukawa, he remains 28-0 in kickboxing and 4-0 in MMA, seemingly with a bright future ahead of him.
There are also unconfirmed rumours Mayweather could take on reigning UFC lightweight champion Khabib Nurmagomedov, who said last month any match-up would be "twice as interesting" as the McGregor fight. He is a great champion and a great fighter.
Addressing the Japanese fighter, he added: "Hold your head up high".
After all, if he can make millions for not training seriously, showing up late to the arena and going through the motions of fighting for a couple of minutes, take the money - if anyone would actually pay for another one of these farces.