In a bout that was scheduled for three rounds just outside Tokyo, Nasukawa lasted only two minutes and 20 seconds before his corner threw in the towel.
Mayweather has said that he would make $9 million for the bout.
The one thing that is undoubtedly certain about the fight is that Mayweather made a big payday for a few short minutes of work. There was some concern that he would no-show because Mayweather was over two hours late to the event.
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"I want to say thank you to Tenshin, it's about entertainment", he said in the ring.
For now, we only can take Mayweather at his word that he'll stay retired and his 50-0 record will remain etched in history. With his hands down, Mayweather was openly laughing before opening up his attack.
And although it won't effect Nasukawa's record nor his reputation in kickboxing, being knocked out on the world stage must have been devastating and he was seen crying in his corner after the fight.
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Nasukawa, though, reportedly faced a multi-million dollar fine if he attempted to kick out at Mayweather. I'm still retired and this was just entertainment.
But Nasukawa never landed a meaningful punch.
The Japanese fighter stumbled to his feet and tried to get his jab working, in a desperate attempt to stop Mayweather's forward march.
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