Let us know how it goes.

Why would someone do that if they’re only planning to go to Japan for less than a week? Plenty of folks would prefer to use a credit card with a particular bonus for certain spend at the same exchange rate during their visit. Others might be expecting the rate to get even better so speculatively loading cards might not always make sense. Other people don’t feel comfortable with digital cards, thinking they’ll lose them somehow etc. Not everywhere accepts this payment type anyway.
Especially now that travel-bonus-visas aren’t an option it becomes less attractive…