North American style shooters aren't that popular in Japan, so good ones from that side of the pacific are rare. Ever notice the best ones are usually from the west?
And I'm aware that RE4 was very popular and critically acclaimed; doesn't mean it wasn't flawed in all of the ways I mentioned. There are much better shooters out there (though I'm not sure I'd even call it a shooter. A bit slow paced in the action department thanks to the gimped controls for that).