Are GS1 barcodes automatically recognised by all international Amazon sites? As I'm British I'd like to register/purchase on GS1 UK, but actually the barcodes are mostly going to be used for items I'm selling in Japan. Japanese websites are a nightmare, even for Japanese people, so I'd rather avoid using it, but, maybe Amazon Japan will want the address linked to the barcode to match the owner of the listing? I've never registered a brand before.

I have a UK Ltd company which I use to sell on Amazon in the UK, and I'm also self Employed in Japan, which I use to sell on Amazon Japan, and as a private label manuacturer. And that's what I need the barcodes for.

Does anyone see any problem with doing this? Thanks.