The difference between the west and Japan in regard to change trays is that in the west (US, Canada, Europe, etc.) they're often available in a small subset of

The difference between the west and Japan in regard to change trays is that in the west (US, Canada, Europe, etc.) they're often available in a small subset of cash payment scenarios, but in Japan they're always available in every cash payment scenario. Not to mention that even when they are available in the west, they're rarely used, but in Japan they're always used. I've lived in the US, Spain, and Japan for considerable periods of time, and the level to which they're available and customarily used in Japan is what makes them such a noteworthy use case.