"SL Hitoyoshi" is a special rapid train towed by a steam locomotive connecting Kumamoto and Hitoyoshi. Both the locomotive and the passenger cars are characterized by their black bodies with gorgeous decorations, making them one of JR Kyushu's popular sightseeing trains. Currently, part of the Hisatsu Line is out of service, so from May 2021, the Kagoshima Main Line runs between Kumamoto and Tosu, and the passenger car is also active as a special train in combination with the DE10. increase.