Originally the Nishikujō – Sakurajima section was not a separate line, but part of the Nishinari Line, which was operated by the private Nishinari Railway and featured a movable bridge over the Hokkō Canal on the Ajikawaguchi to Sakurajima section. A portion of the Nishinari Line became a part of the
Osaka Loop Line when it was completed in 1961, with the rest becoming the Sakurajima Line. The line served as a commuter route for workers in factories along the line as well as for freight, with limited off-peak patronage. This continued until the construction of USJ, which resulted in tourists being the main users of the line. From the end of operations on the
Katsuki Line on April 1, 1985, until the beginning of service on the
Miyazaki Kūkō Line on July 18, 1996, the Sakurajima Line was the shortest passenger line among the JR Group companies. (Including freight lines, the shortest at the time was the
Shinminato Line in
Toyama Prefecture.) Sakurajima Station was relocated on April 1, 1999, the lift-bridge on the former line being unused since the canal was filled in the 1990s. When service began at Universal City Station, there were requests by local residents and business owners for a new station ("Haruhinode Station") between Nishikujō and Ajikawaguchi stations. However, not enough demand was forecast and the requests were not met.
Chronology • April 5, 1898: Nishinari Railway from Osaka to Ajikawaguchi (5.79 km) opens • December 1, 1904: Leased by Railway Operation Bureau • April 1, 1905: Ajikawaguchi -
Tenpōzan section (1.61 km) opens; leased at same time • December 1, 1906: Nationalized by
JGR • October 12, 1909: Line named "Nishinari Line" by JGR • April 15, 1910:
Sakurajima Station opens; Sakurajima - Tenpozan section demolished • May 1, 1934: Gasoline multiple unit (MU) service begins, using
KiHa 42000 train cars • January 29, 1940: Gasoline MU derailment and fire at Ajikawaguchi station kills 189 and injures 69 • May 1, 1941: Osaka - Sakurajima section electrified (1,500 V DC). • November 21, 1943: Freight branch line established between Ajikawaguchi and Osaka • April 25, 1961: Osaka Loop Line service begins; Nishi-kujo - Sakurajima section separated and renamed the "Sakurajima Line" • March 1, 1966: Sakurajima Station relocated 0.5 km east • November 15, 1982: Freight branch line between Ajikawaguchi and Osaka Hokukō abolished • April 1, 1987: With the privatization of JNR, Sakurajima Line becomes part of JR West • April 1, 1999: Ajikawaguchi - Sakurajima section moved to avoid planned USJ theme park; Sakurajima Station moved 0.1 km west • May 9, 1999: Through operation from Osaka Loop Line stopped due to construction of
Universal City Station • March 1, 2001:
Universal City Station opens; Sakurajima Line also referred to as "JR Yumesaki Line" by JR West • March 3, 2001: Through operation from Osaka Loop Line restarts • December 16, 2005: 201 series trains enter service • October 1, 2008: All station platforms become non-smoking; designated smoking areas on platforms are abolished (concourse smoking rooms were removed in October 2003) ==Rolling stock==