Suica
The Suica is a card that people can use to pay for train fares and goods at convenience stores in mainland Japan, as well as other store types and regions. Cash amount can be added or removed electronically, simply by hovering the card over a card reader. It is convenient and faster to use than coins and bills, and magnetic stripe cards. The technology used is called RFID, and a chip by Sony is used, called FeliCa.
Suica Media
Ticket gates at Ikebukuro Station. The center lane is exclusive to Suica.
An automatic Suica reader at Kuzuoka, a station not equipped with regular ticket gates
Keyless locker system for Suica and Pasmo in Shibuya Station