Floyd Mayweather beat the hell outta Tenshin Nasukawa this week ... and he's already flaunting his earnings from the fight -- showing off stacks of Yen in his Rolls-Royce!!!
Floyd annihilated Tenshin in an exhibition boxing match in Japan on Monday -- with the scrap lasting just two minutes ... and Mayweather says he pocketed $9 MILLION from the bout.
So, yeah ... that's around a cool $68,000 per second!!!!!!!!
Didn't take long for TBE to show off the winnings ... 'cause in vids he posted Tuesday -- he bragged about his dope cars and then flashed the Yen he pocketed from the fight.