Earlier quoted context omitted.
American here. What makes "suica" a superior contactless payment method? EDIT: Thanks for the replies! Seems it's a more full featured version of Chicago's Ventra card.
It’s also the fastest of any contactless card I’ve ever used. Faster than Clipper, Taipei Metro card, and faster than apple pay. Even the iPhone integration is fast.
While this may be overkill performance for other countries, the number was derived from Japan Railways’ rush hour statistics and simulations, which made their target to be processing 60 passengers per minute at the gate.
As Japan has one of the highest train station utilization in the world, using contactless systems like MiFare etc. to make iPhone train payment work would probably clog the gates and not be realistic; hence, when iPhone 7 began supporting station payments in Japan, Apple supported FeliCa instead of the other way around. (The fact that smartphone users here disproportionately favor iPhone over Android also probably helped.)