Ey provided by bitWallet, Inc. in Japan is a prepaid rechargeable contactless smart card. It uses Sony's FeliCa technology, also used by the competing Suica cards by JR East. While both cards can be used at participating stores, vending machines, and websites, Suica is the only contactless card that works with JR's ticket gates. While the name derives from euro, dollar, and yen, it works with yen only.