Semboku Rapid Railway  The is a railway line in Osaka Prefecture, Japan, operated by the private railway operator . The line connects Izumi-Chūō Station and Nakamozu Station, with through operations to and from the Nankai Kōya Line up to Namba Station in southern downtown Osaka. Along with services inside the line, through trains also operate to the Nankai Kōya Line beyond Nakamozu to . All stations are located in Osaka Prefecture.  , the railway operated a fleet of 108 electric multiple unit (EMU) vehicles, all based at Nakamozu Depot. From 27 January 2017, a new Semboku 12000 series EMU was introduced on "Semboku Liner" services. The section from Nakamozu to Izumigaoka opened on 1 April 1971, with double track and electrified at 600 V DC. The overhead line voltage was increased to 1,500 V DC from 7 October 1973, and the line was extended to Toga-Mikita on 7 December 1973. The line was extended to Komyoike on 20 August 1977, and to Izumi-Chuo on 1 April 1995.