Isnt he just making her into a porn actress, and at some point she'll have to fuck other porn actors for the video? ofc i hope not but that feels like the path theyre going with no?
Not really. There are different types of porn focuses, especially in Japan. There's a few actresses who hasn't actually had sex during their careers (softcore and gravure), some who pretty much just do amateur and amateur play where they just have sex with the same guy in different situations, those that only play with toys, just lesbians, etc, etc.
Also I don't think he's trying to sale these or promote her as a porn actress, so far he's been doing it for the experience and his own kink. She's doing it for hers.