Former multi-division boxing champion Floyd Mayweather Jr. is now returning from retirement once again. Following the announcement of the boxer's big mixed martial arts debut, "Money" Mayweather has now come forward with a statement. Floyd Mayweather Jr. is now set to face off against Tenshin Nasukawa on Dec. 31 under Rizin Fighting Federation. The fight will be under "special rules." However, the details concerning the bout's rule set have yet to be revealed. Taking to Instagram, "Money" Mayweather has now come forward with his first message since the bout's reveal. Check it out below. "December 31st 2018 #Tokyo" https:\/\/www.instagram.com\/p\/BpyCaoFhH0q\/?utm_sourceig_embed For more MMA news click here.