Tenshin Nasukawa has touched down in Las Vegas -- and put on an impressive workout at Floyd Mayweather's private boxing gym ... where he told us he'll do better in the ring against Floyd than Conor McGregor!!!
The 20-year-old kickboxer looked lightning fast, strong and scary athletic when he showed off his skills in the ring ... and then humbly told reporters he's just hoping to land a shot on Floyd.
But, let's get serious ... dude looks good. He looks hungry. And, Floyd could be in real trouble.