i believe that to be case too. same reason why you dont see hot whites in jav, one it hits closer to home than black guys and two i always see the same really dorky skinny white guy in jav.Yeah, I hate that shit.
But, I wonder if it's on purpose. I lived in Japan before, and in Tokyo and Osaka you can find fit black dudes. Tokyo has lots of Nigerians, and there is a US military presence after all. However, instead of recruiting those dudes, JAV mostly uses a handful of fat black guys. Maybe this allows them to have their cake and eat it too: they can appeal to the IR niche, without turning off all the guys who are intimidated by muscular BBC.
i knew a guy who meet him in real life , he said he didnt really wanna help any other white guys get in the biz cuz he felt that he wanted to be the go to white guy.