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Hopefully others will shed light on the gist of your question, Japss; I was curious, though.
What's the difference between a JAV actress and an amateur actress?
I can see how a woman could be designated as an amateur if she submits homemade porn to the kind of venue that sells that sort of thing, or if a woman is picked up off the street and has no idea what will be hitting her (although those kinds of films are all pre-arranged, as we know); but if a woman approaches a porn company and gets a job in a porn movie - boom! She's in the club.
Some might say a superstar like Maki Hojo is a bonafide JAV actress, whereas a rookie with just one or two films to her credit should not be placed on the same level. I think it would be condescending and unfair to call the newbie an "amateur," though.
Even if she does it once for laughs, or as an experience. If she got interviewed, hired, paid, and if she took off her clothes and offered her intimate areas for fun friction, she's a JAV or AV actress.
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