Floyd's last professional boxing match was roughly 16 months ago when he defeated Conor McGregor in one of the sport's most high-profile fights of all time.
Mayweather's record remains 50-0 as the fight was just an exhibition and won't count on his record. Mayweather was gracious in victory, hugging the weeping Nasukawa and calling him "still a great champion". The Japanese crowd were well behind their fighter as the two boxers entered the ring but that was as good as things got for the home crowd.
With the Japanese fighter clearly battling to stay on his feet, the trainer rushed in and stopped the fight with less than one minute of the first round remaining.
Speaking afterwards, Mayweather said: "It was all about entertainment".
According to Helwani, if the numbers were correct, Mayweather earned $4.5 million a minute for the fight or $9 million total for the two-minute fight. I want to thank God for this event, for my team.
It was an exhibition match that was initially going to be held behind closed doors, but was thrust on to the main stage in Tokyo after details of the bout were leaked. "This don't go on our record", Mayweather announced to the crowd in Tokyo.
Thank you very much for everyone who supported me.
"I'm still retired. I don't look forward to coming back to boxing but I did this just to entertain the fans in Japan", added the 41-year-old.
Don't call Floyd Mayweather's latest fight a comeback.