> Since there's no point in generating keys for a device which will not be used in Japan, non-Japan SKUs don't have Osaifu-Keitai functionality.
AFAIK, all iPhones from all regions since like iPhone 10 (internet says iPhone 7) support Osaifu-Kaitai unless I don't understand what that means. My USA iPhones works everywhere Suika, Pasmo, Icoca, etc work. Every station, bus, vending machine, convenience store, super market, restaurant, and retail store that accept these forms of payment, they all just work.
Given that all of this works, what is it I'm missing?