Sumo Wrestlers are gay. The Japanese Yakuza have traditionaly kept them as a sort of gay harem. The little tiny Japanese runts wanted to be big and large and strong. They thought if they sucked enough SUMO dick they'd be strong too.

Sumo wrestling evolved with the Yakuza. They view Sumo wrestlers as proxies for themselves. They think their big fat baby wrestlers are the toughest around (of course they're so fat they can't move so it kind of makes it hard to actually fight). Sumo wrestling is ridiculous like the Japanese.

Who wants to see giant fat babies wrestle each other? Whether they are big and strong, they are fat as fuck and in a real fight, being obese is not a winning strategy. Like the rest of the Japanese idiot culture, the Japs hold up Sumo as the paradigm of wrestling when obviously it's some weird mental retard version of wrestling.

The Yakuza used to have gay orgies with the Sumo wrestlers all the time. The little jap tail runts liked to suck the Sumo semen and even lick their assholes out. The Yaks would all get fucked by the big fat SUMOs. They little runts thought that the more Sumo fluids they put in their orifices, the stronger they would be.

The SUMO wrestlers don't have any dicks or balls anymore. You can see vaginas on the wrestlers above. Like the yaks, they pad their diapers with dildos. The Sumo wrestlers are all hermaphrodites like the Yakuza. The Yakuza inbred them so much they lost all their dicks and balls like the Yakuza themselves.

That is why the Japanese started opening up Sumo wrestling to people outside Japan. The Yakuza want to be able to suck the dick and lick the balls of their Sumo wrestlers. So they are now allowing people from Hawaii and Fiji to wrestle as Sumo wrestlers because they still have dicks.