Yes I hated parallel imports so much. Some sellers are open about it but many would include fake receipts along fake products to show they were purchased in USA or whatnot. What’s shocking is in Japan this is pretty new / rare (not Amazon fucking up supply chain /comingling) but generally ordering A and getting a fake itself.
There is a lot of ecomm change happening now in Japan with the rise of Mercari, junk items selling more than new / real (makes no sense) etc.
Pre pandemic, it was a dream to order online in Japan. No fakes, low prices, great quality.