Also, his arms were made of butts.
According to one site, it's not a mystery as to how Raiden was able to carve out such an impressive record. He was a Nephilim -- a type of human-giant hybrid that, according to the Book of Genesis, can only be created by an angel hooking up with a human. It's obvious to see when you watch footage shot towards the end of his career: with a disproportionally-sized head and abnormally-small hands (both of which are indicative of a genetic abnormality), he towers over everyone else like a ... well, a goddamn tower. If he isn't a holy bastard, what else could he be?
How about a total fabrication? This footage -- cited as proof by revelationnow.net -- is actually ripped from a mockumentary, Big Man Japan, which follows an "eccentric man [who] periodically transforms into a 100-foot tall giant in order to defend Japan against similarly sized monsters."
It's the equivalent of borrowing that deleted sex scene from Hancock and pretending that it's footage of an actual intercosmological porno. That's not to say that Raiden is a made-up character: he existed when we said, kicked as much ass as we said, and was as big a dude as we made clear. He just isn't the forbearer of a superhuman race. Feel free to voice your disapproval in the comments section below, crazyfolk.