Comment by Shank

One thing I really love that Japan got right was the creation of e-money systems that are anonymous (you can get a Suica for 20,000 yen without any registration information), work offline (you don't need network at-payment, nor does the terminal), and are easily accessible (you can get them at any train station, you can charge them at any ATM or convenience store with cash). In contrast, a debit/credit card usually requires a lot more pain to get onboarded with. The closest thing is probably those silly visa prepaid cards you can buy, but they require a little work to use regularly.