"Hmm. I take it they're not exactly secretive either, if by your implications it's almost a household name. From what I can tell, the yōkai prefer to keep to themselves for the most part and prefer to keep their business apart from human business." Well, except for the one that was convinced humanity was going to be the downfall of yōkai-kind.

"It's only one datapoint to reference off of but if it's that major a thing from when you are, there'd be no reason I wouldn't have at least heard of or read about it at some point when I'm from. Perhaps my own offered references may not be as widespread so much as particular of American pop culture, not to mention specific to tastes, but I don't suppose you are familiar with the Jupiter Jim film franchise or the martial arts action star icon Lou Jitsu?"