Bushido is the world's toughest form of hand-to-hand combat.
It pulls in the world's biggest live audiences for any form of wrestling.
Few bouts go the distance.
This wrestling is for real.
Competitors give and take ferocious blows to the head and body.
It combines the best of judo and karate, sambo and kickboxing.
Never before have fighters in these different disciplines challenged one another in the same ring.
The UWFI, the sports governing body, has strict rules and regulations.
You're allowed to use your forearm, but you must not use the point of your elbow.
You can slap, but you cannot bite, scratch or headbutt.
Headbutting is illegal.
When your opponent is on all fours, you cannot kick to the head.
But as soon as one arm is up in defense, a kick to the head is allowed.
When your opponent is on all fours, the rest of the body is a legitimate target.
If a foul is committed, then points are deducted.
Four points are conceded when a suplex throw results in a referee's count.
Three points are lost for any knockdown, and one point is deducted for a suplex throw.
Fighters can escape any submission hole by touching the rope, but they then concede a point.
A submission at any time ends the fight.
It's quite a night in Tokyo.
This is the Meiji Jingu Stadium, Japan's premier arena for baseball.
Tonight, every seat will be filled for Bushido.
50,000 for body slams, not grand slams.
The top American fighters have never seen anything quite like it.
The fans are crowding in for another top lineup of stars from home and abroad.
And it doesn't take too many sumo wrestlers to fill the front row.