Afterwards, Mayweather said, "I'm still retired".
The much-maligned bout received little coverage in the mainstream media and the fight provided the evidence why.
Floyd Mayweather knocked down Tenshin Nasukawa three times in the first round as he beat the Japanese kickboxer in an exhibition match worth a reported $9m. "I'm still retired. I don't look forward to coming back to boxing".
It was announced that the bout would be nine minutes of boxing (3x 3 minute rounds) AND the result won't count on either fighter's record. Nasukawa's father threw in the towel after 140 seconds of the first round on Monday as his 20-year-old son bravely teetered around the ring trying to get up.
Mayweather claimed through his Instagram account prior to arriving at Saitama Arena that he would be paid $9 million for facing Nasukawa. "I'm still undefeated. This is just entertainment for the people", he added. Tenshin is still undefeated - I'm still undefeated. Well, when he's picked up a million dollars a minute, who can blame him?
"I want the fans all around the world to support him". Last year, he knocked out mixed martial arts fighter Conor McGregor in the 10th round of a super-hyped boxing match.
But Mayweather changed his tune after knocking out Nasukawa, who is 27-0 with 21 knockouts in kickboxing and 4-0 with two knockouts in MMA. Hamasaki, whose record improves to 17-2, has previously fought for Invicta FC, where she was the company's atomweight champion from 2015 to 2016.