there are many currencies out there like that. the russian ruble isn’t that much better the yen (at 60 per USD, at least ‘officially’, black market rates even worse). indonesian rupee is much worse at about 15000 per dollar, though at least it is relatively stable and isn’t bouncing around much.

of course the worst modern case is the zimbabwe dollar. in the last 20 years zimbabwe has had three re-valuations of its currency for a combined total of 25 decimal places moved. they eventually gave up on their own currency and demonetized it, offering zimbabwe bank account holders 1 US dollar for every 7 quadrillion zimbabwe dollars. although 9 currencies are now officially legal tender, 90% of all transactions are now done in US dollar (and much of the remainder are south africa rand).

Especially when one has a yen for that acquisition.

so despite what people think about the dollar being worth so much less than before, imagine how the japanese feel about the yen, relatively speaking. today, a 10 yen coin is the smallest denomination accepted by most vending machines.