For all the people complaining about the author portraiting sumo as the ultimate martial art now, the final boss of this series is a guy that trounces armies with martial arts, is treated as a nuke and has the president of the US as his lackey just because when he appears in front of them he makes them piss themselves. And like him there are other similar guys around, like a giant human vacuum or a clone of a samurai.
Just don't. This guy is on Kojima's level of absurdity in a supposed real world, don't question the logic behind.