How are japanese IC cards so fast at detecting and processing payment?

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Japanese IC cards are so amazingly fast I don’t even have to slow down from a fast walk when paying for access to the subway line, or any train or vending machine for that matter.

In other countries, you have to tap the card on the machine and leave it there for a few seconds before it registers your pay.

How did japan get their IC cards to work so fast?

In: Technology