White man enters Sumo ring

Amazing he can get those heavy guys moving and then uses their weight momentum against them.
Traditional Japanese are not going to like this.
 
Greco Roman wrestling background maybe?..or Judo?
Use your opponents weight to your advantage..a couple of those wins were classic Judokan moves
a couple times he side stepped his opponent and just pushed him over...
see how he hooks the leg..either left or right so the opponent knows that if he goes down..they will both go down...so he eases up