What is "desuca"

is a rechargeable contactless smart card ticketing system for public transport in Kōchi Prefecture, Japan, introduced from 25 January 2009. The card is issued by the , founded by Tosa Electric Railway (Tosaden) and Kōchiken Kōtsū. Following the restructuring of the two founder companies, the company is now an affiliate of Tosaden Kōtsū. 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.