Is porn more mainstream in Japan compared to the West?

[Irk]

Asking because

• The culture of real sex/hookups is weaker in Premium Link Upgrade
• Their titles all start with codes like they're new releases in a season
• I did a search on Reiko Kobayawa and one poster mentiond that she's famous in Premium Link Upgrade . I heard Maria Ozawa was also like that years ago.

Makes me think JAV is more mainstream there. But I'd like to ask people with more knowledge