The Samarang–Joana Stoomtram Maatschappij, N.V. (SJS, Dutch for Steam Tram Company Samarang–Joana) was from 1879 to 1959 a private tram company on the Dutch East Indies (now Central Java), providing passenger and freight trains on a 417 kilometers long network with a gauge of 3 feet 6 inches (1067 mm).