Nobuyuki Sakakibara, the head of Rizin Fighting Federation, who traveled to the U.S. to woo Mayweather back to the fight, has said it involves the largest payout for an exhibition fight but has not given specifics.
Mayweather previously said he was already making “seven figures” just by talking about it.
Nasukawa, 20, appearing earlier in the day, said he wanted people to see his “courage, determination and challenging spirit.”
Nasukawa, despite his no-loss record in kickboxing and mixed martial arts, was previously little known outside Japan. He said he enjoyed the sudden international attention.
He acknowledged he didn’t understand what the English comments were saying on his Instagram account but added: “I love it.”
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