I watched all 2 minutes and 19 seconds of the "fight" and all I have to say is FAKE. Though Tenshin is not a boxer he is a high level kickboxer, who has fought the like of Kyoji Horiguchi and has a 28 and 0 record. Two things to note is that Tenshin has taken blows before and Floyd is not a power puncher.
Tenshin was knocked down 3 times in Round 1 and when his corner threw in the towel after the third knockdown he left the ring without a mark on him. The most suspicious knock down was the first one in which Tenshin was acting like Rocky Balboa trying to get up, and the right to the body actually missed. If you look at the footage you will see that Floyd actually trips Tenshin.
The whole thing was just a $9 million money grab for Floyd and these types of shows are going to end up how we remember the great Floyd "Money" Mayweather.