Japanese porn consumers, at least in scripted productions, tend to want to see women performing in roles like business women, police officers, teachers, Doctors, or other high status positions.
look at the one below, which is a time stop set in a court room.
All the women are dressed smartly, wearing nice underwear, when the sex starts they act appropriately shocked, while still consenting.
Likewise this one set on a train, all the women are well dressed. The type of women Japanese men would see everyday.
compared to what's being produced in the west, Japanese porn has better production values, better acting, and while a lot of it is morally objectionable, at least the women in it are shown as being something other than mindless whores.