I would disagree that western porn is more "hardcore". I agree it is more explicit with its uncensored dicks and pussys and high amount of anal. With that said, look at JAV manufacturers like Toyohiko, Dogma, and
えむっ娘ラボ(Emukko Lab). If you like rough sex and deepthroating and piss drinking like I am a fan of JAV should be your main go to. If it isn't that's only because the mosaic censorship throws you off too much. Once you get past the censorship JAV is a whole new world. I could also care less about story lines in either western or JAV.
JAV understands fetish and executes fetish titles much better than any ADHD ridden western porn company can produce. Even the smallest of Niche JAV movies have production quality greater than most western porn scenes. These days a good western porn producer is very few and far in between.
Western porn in recent years is over all much more stale and shitty. Especially American based porn. Legalporno is what is keeping western porn relevant in Europe. I'm not interested in pornstars who are basic bitches who do basic bitch shit so I could care less if I can see their cooter uncensored.