It would cost an arm and a leg to film in Japan. Everything would probably be double what it is here.

They could bring girls over here, but they would have to put her up and pay her a lot of money too.

Most americans seem to be bothered by the mosaic covering the genitals in JAV. It seems unlikely that you will find a big enough market that doesn't mind. And it is unlikely that they will make unmosaiced versions for the West because officials will worry that they will be smuggled back into Japan.