 All the stations accept manaca, a rechargeable contactless smart card.This is the second loop subway line built in Japan, after Toei Ōedo Line.The Ōedo Line, however, is not a true loop line as it is operated like a "6" lying on its side, with trains from the western Hikarigaoka terminus running anticlockwise around the loop and terminating at Tochōmae Station and then returning around the loop to Hikarigaoka.