Amazon JP sometimes doesn't show me certain more "adult" Kindle manga such as e.g.
https://www.amazon.co.jp/dp/B07YX26HQL
I can see it if I'm not logged in and under a Japanese VPN, but I get a 404 when I'm logged in even though my account is set to Japan and my default address is set to Japan and I'm using a VPN. What should I do?