The Hitahikosan Line (日田彦山線, Hitahikosan-sen) is a railway line in Japan, operated by Kyushu Railway Company (JR Kyushu). It connects Jōno Station in Kitakyushu, Fukuoka Prefecture with Yoake Station in Hita, Ōita Prefecture and features the 4380 m Shakadake Tunnel between Chikuzen Iwaya and Hikosan station, where a fatal tunnel collapse occurred during construction in 1953, killing 21 construction workers. The line is named after Hita and Mount Hiko.