Earlier quoted context omitted.
I think a lot of the motivations are AML. Suica has a low maximum balance, that probably restricts the nefarious use cases.
I would personally argue that 20,000 yen is not a low maximum balance for day-to-day purchases like food, because you can recharge so easily. Before Suica (and a bit concurrently), JNR and later JR issued "orange cards" that included both high value formats and lower value formats. The "high value" cards were 5,000 yen and 10,000 yen respectively, so the new maximum is 2x the previous "high value" orange cards that t…
Carry a coinpurse. I use an old faux-suede Samsung camera pouch.[1] Plus it's fun when someone is running an errand for you, like getting you a snack from the konbini across the street, and you plop your coinpurse on the desk with a thud, then pour out a handful of 500-yen coins and say "this should cover it", like a feudal lord.
[1] kinda like this: https://www.amazon.ie/DFVmobile-Samsung-Galaxy-Camera-Closur...