is a rechargeable contactless smart card ticketing system for public transport in Kà Âchi Prefecture, Japan, introduced from 25 January 2009. The card is issued by the , founded by Tosa Electric Railway (Tosaden) and Kà Âchiken Kà Âtsà «. Following the restructuring of the two founder companies, the company is now an affiliate of Tosaden Kà Âtsà «. The name stands for , and card.
The card claims to work positive for the environment, as it would encourage using public transport, thus reducing carbon emission. A user is able to add its loyalty point by using the card, as well as by doing something "ecological", such as avoiding a disposable plastic bag at a store.
The card is usable for the following operators' lines:
The card also functions as an electronic money.