If you come to Japan, you must see the Sumo match.
Sumo (相撲 sumō?) is a competitive full-contact wrestling sport where a rikishi (wrestler) attempts to force another wrestler out of a circular ring (dohyō) or to touch the ground with anything other than the soles of the feet. The sport originated in Japan, the only country where it is practiced professionally.
by wikipedia
Oh, you don't know Sumo well?
Ok, let's watch this video.
This is too Real Sumo Fighting video selected by Japanese local staff.

Hehe, I hope you are really interested in Sumo now.
Please visit Japan and see the real Sumo match.
Sumo Tournament Schedule and How to buy Sumo ticket.