Fight fans were shocked to find out that Floyd Mayweather is coming out of retirement (again) for one more fight.
"I would probably say that this is my biggest event in life, so far", said Nasukawa.
"It was a surprise offer but I accepted without hesitation", said Nasukawa at the press conference.
"Throughout my career, I never fought at a higher weight class, but I was always a smaller fighter. As a professional I haven't had a chance to go outside the U.S.to display my skills and to display my talent for the world".
Nasukawa has also competed in four pro mixed martial arts fights, winning all of them, fighting under the Rizin banner.
It seems for Mayweather, who won boxing world titles at five different weight divisions, this fight is about expanding his brand and business interests overseas. Lately Mayweather has suggested he would face UFC lightweight champion Khabib Nurmagomedov however Dana White, the UFC president said this would not happen under boxing rules.
The fight could be the first steps towards Mayweather's highly anticipated rematch with Conor McGregor in the UFC.
'My opponent looks taller than he actually is and I think that comes from the aura that he has, but I think I can hit him, ' he said.
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The 20-year-old has won all 27 professional kickboxing bouts that he's fought in since 2014, with 20 of those fights ending in knockouts. Mayweather has only boxed throughout his career while Nasukawa has fought only as a kickboxer and in mixed martial arts.
"And I would like to be the man who makes history".
RIZIN 14 is scheduled for December 31, 2018, live from the famed Saitama Super Arena in Saitama, Japan. "He has youth on his side and he's going to bring a lot of excitement".
"We still have some work to do", said Nobuyuki Sakakibara, the RIZIN chairman. My punch can change history, ' he said.
Mayweather responded: "I just want to entertain".
"As far as the weight class, we're not really anxious about that", he said.
Time will tell what he means by "special bout".