I just don't think it's "their thing". I'm not sure that the Japanese are fond of 3D action games period. They don't like first-person shooters, they don't like 3D platformers, it's just not their bag. It seems that they like 3D, but in slower game genres like stealth, RPG, etc.
I know that's a blanket statement, but you can't help but make it after years of watching them pretty much ignore certain game genres that are really popular in the West.