Hanshin Namba Line

The line began as part of a different scheme from the one that later took it to Namba. It opened on 20 January 1924 (Taishō 13) as the Dempō Line (伝法線), running between Daimotsu and Dempō; the Dempō–Chidoribashi section followed later the same year, and on 28 December 1928 (Shōwa 3) the Amagasaki–Daimotsu section — running parallel to the Hanshin Main Line — was added. This early line was constructed as an advance portion of the planned "Second Hanshin Line" (第二阪神線), a high-speed bypass that was to branch off the Main Line and run via Chidoribashi to Daimotsu and Amagasaki. The section between the Main Line and Chidoribashi was never built, owing to the Shōwa Depression (昭和恐慌) among other factors, and that portion of the scheme became an unbuilt line.

A later plan instead proposed extending the line from Chidoribashi to Namba. As a first stage, construction of the Chidoribashi–Nishikujō extension began in June 1960; the line was renamed the Nishi-Osaka Line (西大阪線) on 20 May 1964, and the Chidoribashi–Nishikujō section opened the same month. A Nishi-Osaka limited express service began in September 1965 but was discontinued on 1 December 1974. The overhead line voltage was raised from 600 V to 1,500 V on 12 November 1967. The push toward Namba then stalled: the second-stage Nishikujō–Kujō work, begun in August 1967, was suspended in September 1967, and the extension remained dormant for decades amid local opposition and the effects of the oil shock.

The project revived in the Heisei era. Nishi-Osaka Hayasoku Railway (西大阪高速鉄道) was established on 10 July 2001 as the third-sector entity to own the extension's infrastructure and resume construction, and work on the Nishikujō–Namba extension restarted on 7 October 2003 with a ceremony at the Osaka Dome. On 20 March 2009 the Nishikujō–Ōsaka Namba section opened; on the same day the line was renamed the Hanshin Namba Line and Kintetsu's Namba terminus was renamed Ōsaka Namba Station. The official name includes the word "Hanshin" because Kintetsu, with which Hanshin runs through services, has its own Namba Line. The line was awarded the 8th Japan Railway Award on 14 October 2009.

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Ownership and operation are split along the route. Hanshin Electric Railway is the Class 1 railway operator for the Amagasaki–Nishikujō section (6.3 km); for the Nishikujō–Ōsaka Namba section (3.8 km) Hanshin operates as Class 2 operator while Nishi-Osaka Hayasoku Railway holds the infrastructure as Class 3 operator. The maximum operating speed is 106 km/h and the longest train formation is ten cars.

From Nishikujō the extension crosses the Osaka Loop Line and the Ajigawa river on a viaduct, then runs underground from around Kujō to Ōsaka Namba. The dense housing and factories around the Ajigawa crossing ruled out conventional crane erection, so the 530-tonne arch of the bridge was prefabricated off-site, assembled on a barge and set in place by letting the ebb tide of Osaka Bay lower the barge (the pontoon method). The total project cost of the Nishi-Osaka extension was initially estimated at ¥107.1 billion (1,071億円); it was later recorded as ¥89.0 billion (890億円) on Nishi-Osaka Hayasoku Railway's official site.

The line serves as a bypass from the Hanshin Main Line corridor to western and southern Osaka, and the opening of the Nishikujō–Ōsaka Namba section brought through-running with the Kintetsu Namba and Nara lines. This created a direct route across Kansai linking Kobe and Sannomiya with Nara and other places on the Kintetsu network by way of Osaka and Namba; the opening catchphrase was "Kobe, Namba, Nara — connected." Today there are through rapid-express services between Kobe Sannomiya on the Hanshin Main Line and Kintetsu Nara Station on the Kintetsu Nara Line via the Hanshin Namba Line, alongside through local, semi-express and suburban semi-express services between Amagasaki and Kintetsu Nara. The congestion rate on the line was 73% in fiscal year 2020, measured on the Chidoribashi→Nishikujō section between 7:32 and 8:32.

11 stations tracked on the map, listed alphabetically. Select any to read its page.

• Amagasaki (Hanshin)尼崎
• Chidoribashi千鳥橋
• Daimotsu大物
• Dekijima出来島
• Dempo伝法
• Dome-Maeドーム前
• Fuku福
• Kujo (Osaka)九条
• Nishikujo西九条
• Osaka Namba大阪難波
• Sakuragawa (Osaka · Hanshin)桜川

• 192420 January: the Dempō Line opens (Daimotsu–Dempō); the Dempō–Chidoribashi section opens later the same year.
• 192828 December: the line is extended Amagasaki–Daimotsu, running parallel to the Hanshin Main Line.
• 1960June: first-stage construction of the Namba extension begins (Chidoribashi–Nishikujō).
• 196420 May: line renamed the Nishi-Osaka Line; the Chidoribashi–Nishikujō first-stage extension opens the same month.
• 1965September: Nishi-Osaka limited express service begins.
• 1967August: second-stage Nishikujō–Kujō work begins, suspended in September. 12 November: overhead voltage raised from 600 V to 1,500 V.
• 19741 December: Nishi-Osaka limited express service is discontinued.
• 200110 July: Nishi-Osaka Hayasoku Railway is established as the Class 3 operator to resume the Nishikujō–Namba extension.
• 20037 October: construction of the Nishikujō–Namba extension restarts with a ceremony at the Osaka Dome.
• 200920 March: the Nishikujō–Ōsaka Namba section opens; the line is renamed the Hanshin Namba Line and through-running with the Kintetsu Nara Line begins. 14 October: awarded the 8th Japan Railway Award.