The concept looks awesome:
https://news.bitcoin.com/contactless-smart-card-system-japan-bitcoin-hardware-wallets/
https://www.sony.net/Products/felica/
It seems Japan has been adding lots of coal to the furnace since the 2nd quarter of 2017...
https://www.cryptocoinsnews.com/bitcoin-accepted-260000-stores-japan/
Oli Lean