You will definitely take the local train called Kotoden during your travel in Kagawa.
In the past, only the card IruCa released by Kotoden company could be used to take the train, or tickets bought at a station. From now on, you can also use the cards ICOCA and Suica. This new change makes it more convenient for domestic and foreign travelers.
Kotohira, Shido and Nagao, three lines counting 52 stations, are benefiting from this new change. You can use any kind of IC cards including Kitaca, PASMO, Suica, manaca, TOICA, PiTaPa, ICOCA, Hayakaken, nimoca, and SUGOCA. When you come to travel in Kagawa, do not forget your IC card!