Electronic money is money stored electronically, and spent by using a technical device, such as a smart card. If it is stored on a card, its use may be secured by a PIN code. In Japan, electronic money is commonly used to pay for train tickets. JR East’s prepaid train ticket (Suica) and JR West’s IC Operating card (ICOCA). Suica and ICOCA are plastic cards with a built-in IC chip. Suica was originally introduced in 2001.