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Osaka Loop Line

大阪環状線

The Osaka Loop Line (Ōsaka kanjō-sen) is a railway loop line operated by the West Japan Railway Company (JR West) that encircles central Osaka. It is a heavy-rail line within JR West's urban network, running at 1,500 V DC overhead electrification on 1,067 mm narrow-gauge track with a maximum operating speed of 100 km/h.

The line has 19 stations, all of them inside the city of Osaka, Osaka Prefecture, passing through the wards of Tennōji, Chūō, Jōtō, Miyakojima, Kita, Fukushima, Konohana, Minato, Taishō and Naniwa.

The full circle is 21.7 km, but listings such as the Tetsudō Yōran railway handbook, supervised by the Ministry of Land, Infrastructure, Transport and Tourism, give the line as the 20.7 km route from Tennōji round to Shin-Imamiya and assign the 1.0 km Shin-Imamiya–Tennōji segment that closes the circle to the Kansai Main Line. Because the route is a complete ring, the conventional Japanese "up" and "down" direction labels do not apply; trains are instead described as running on the "outer loop" (clockwise) or "inner loop" (counter-clockwise), like Tokyo's Yamanote Line.

OsakaKonohanaMinatoTaishoChuoNishinariAbeno2 km
Route of the Osaka Loop Line · Osaka · Boundaries: MLIT / GSI / Japan Post
Osaka Loop Line local train, 323 series formation LS21, entering JR West Taisho Station.
Osaka Loop Line local train, 323 series formation LS21, entering JR West Taisho Station. · MaedaAkihiko · CC0 · Wikimedia Commons

History

The loop was not built as a single project but assembled from sections of older lines, joined by one new connecting section. The eastern half, from Ōsaka Station to Tennōji via Kyōbashi, was opened by the private Osaka Railway in two stages in 1895: Tennōji–Tamatsukuri (about 3.8 km) on 28 May, and Tamatsukuri–Umeda (about 7.0 km) on 17 October, to link the company to the government railway network. Osaka Railway merged into the Kansai Railway in 1900, which was nationalised in 1907 under the Railway Nationalization Act; in 1909 this eastern section was named the Jōtō Line. Its length was restated in metric units in 1930, as 10.7 km, and the line was electrified in 1933. The north-western quarter, Osaka to Nishi-Kujō, was built by the Nishinari Railway, which opened its Osaka–Ajikawaguchi line in 1898 to give the port rail access; that railway was leased to the government in 1904, nationalised in 1906, named the Nishinari Line in 1909, and electrified in 1941. The south-western portion, between Tennōji and the Sakaigawa signal box, combined the short Tennōji–Imamiya stretch of Osaka Railway's 1889 main line with part of a Kansai Main Line freight line that the government railway opened to the port area in 1928.

To complete the circle, Japanese National Railways (JNR) built a new section of track between Nishi-Kujō and the Sakaigawa signal box. The new Nishi-Kujō–Taishō–Tennōji section (7.4 km) opened on 25 April 1961, together with Bentenchō and Taishō stations, and the combined route — the former Jōtō Line, the Osaka–Nishi-Kujō part of the Nishinari Line, and the new section — was named the Osaka Loop Line; the remaining Nishi-Kujō–Sakurajima stretch of the old Nishinari Line was split off as the Sakurajima Line. At first the tracks were not joined at Nishi-Kujō, so services ran in the shape of a mirrored figure (Sakurajima–Nishi-Kujō–Osaka–Kyōbashi–Tennōji–Nishi-Kujō); continuous loop operation began in 1964 once elevated double track around Nishi-Kujō was completed, at which point Shin-Imamiya Station also opened. In 1968 the Tennōji–Shin-Imamiya section was quadrupled to separate Loop Line operations from the Kansai Main Line.

JR West runs several types of train on the line. Local trains operate all day, some making the complete circuit and some serving only the busier eastern half between Osaka and Tennōji via Kyōbashi. The line also acts as a bypass linking the Tōkaidō Main Line in the north with the Hanwa Line in the south, and carries trains running through to other JR lines. Through trains to the Kansai Main Line (Yamatoji Line) began in 1973 and now run as the "Yamatoji Rapid" and "Regional Rapid". From the Hanwa Line, through-running became possible in 1989, when a connecting track at Tennōji was completed, and expanded significantly in 1994 with the opening of Kansai Airport, when the limited express Haruka and the Kansai Airport Rapid began using the loop. On the loop itself, the charged limited expresses Haruka (for Kansai International Airport) and Kuroshio (southbound toward Wakayama) stop only at Tennōji. Since March 2023 they have also called at new underground platforms at Ōsaka Station, built on the line that runs from Shin-Ōsaka to the loop, and the Kuroshio services that used to stop at Nishi-Kujō now pass it. Traffic is heavier on the eastern half than on the western half via Nishi-Kujō, and freight trains, operated by JR Freight, now run only between Fukushima and Nishikujō.

JR West 201 and 103 series in orange vermilion livery on the Osaka Loop Line. View full size (opens in a new tab)
JR West 201 and 103 series in orange vermilion livery on the Osaka Loop Line.ignis · CC BY-SA 3.0 · Wikimedia Commons

The Osaka Loop Line functions as the central line of JR West's urban network, and in terms of ridership it ranks second among JR West's conventional lines, after the Tōkaidō Main Line. Reported usage was 984,395 daily passengers in fiscal year 2015, and the average number of passengers passing along the line in fiscal year 2019 was 292,574 per day. Its rolling stock has changed over the decades, from the 101 series and the 103 series of 1969 through the 201 series to the 323 series — the first train type built specifically for the Osaka Loop Line — which entered service on 24 December 2016 as the first of a planned fleet of 21 eight-car sets to replace the 103 and 201 series. The 103 series ended Loop Line service in 2017 and the 201 series in 2019, and JR West began test running of automated-operation trains on the line in February 2020.

Stations on this line

19 stations in route order around the loop, from the timetable data on the map. Select any to read its page.

Timeline
  • 188914 May: Osaka Railway opens its main line Kashiwara–Tennōji–Minatomachi (present JR Namba), a short part of which (Tennōji–Imamiya) lies on the present loop.
  • 1895Osaka Railway opens the eastern half (future Jōtō Line) in two stages: Tennōji–Tamatsukuri (~3.8 km) on 28 May and Tamatsukuri–Umeda (~7.0 km) on 17 October.
  • 18985 April: the Nishinari Railway opens the Osaka–Ajikawaguchi line (future Nishinari Line), giving the port rail access; Fukushima and Noda stations open on the present loop.
  • 19006 June: Osaka Railway merges into the Kansai Railway, unifying the Tennōji–Ōsaka line.
  • 19061 December: the Nishinari Railway is nationalised under the Railway Nationalization Act.
  • 19071 October: the Kansai Railway is nationalised under the Railway Nationalization Act.
  • 190912 October: under the national line-naming, the eastern section is named the Jōtō Line and the Osaka–Nishi-Kujō section the Nishinari Line.
  • 19281 December: the government railway opens the Kansai Main Line freight branch (Ōsaka Rinkō line) to the port area, forming part of the south-western portion of the future loop.
  • 193316 February: the Jōtō Line (Tennōji–Ōsaka) is electrified and electric-train operation begins.
  • 19411 May: the Nishinari Line (Ōsaka–Nishi-Kujō–Sakurajima) is electrified.
  • 196125 April: the new Nishi-Kujō–Taishō–Tennōji section (7.4 km) opens and the combined route is named the Osaka Loop Line; the Nishi-Kujō–Sakurajima stretch is split off as the Sakurajima Line. Bentenchō and Taishō stations open.
  • 196422 March: with the Nishi-Kujō elevation and full double-tracking complete, continuous loop operation begins and Shin-Imamiya Station opens.
  • 196825 March: the Tennōji–Shin-Imamiya section is quadrupled, separating Loop Line operation from the Kansai Main Line.
  • 196910 December: 103 series EMUs enter service on the line.
  • 1973Through-running of Kansai Main Line (Yamatoji Line) rapid trains onto the loop begins.
  • 1989A connecting track between the Hanwa Line and the Kansai Main Line platforms at Tennōji is completed, making through-running from the Hanwa Line possible; the limited express Kuroshio begins running through via the Osaka Loop Line.
  • 19944 September: Kansai International Airport opens; the limited express Haruka and the Kansai Airport Rapid begin operating via the Osaka Loop Line.
  • 201624 December: the 323 series — the first train type built specifically for the Osaka Loop Line — enters service, leading a planned fleet of 21 eight-car sets to replace the 103 and 201 series.
  • 20173 October: the 103 series ends regular service on the line.
  • 201817 March: station numbering (line symbol O) is introduced on the line.
  • 20197 June: the 201 series ends service on the line; 323 series deployment is completed on 8 June.
  • 2020February: JR West begins test running of automated-operation trains on the line. From 14 March all local and rapid services become eight-car formations.

Sources

Last updated 16 October 2026.

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