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Takamatsu-Kotohira Electric Railroad

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A Kagawa-based Japanese transportation company operating three electric railway lines and related bus services under the Kotoden brand.

Last updated August 25, 2026

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Overview

Takamatsu-Kotohira Electric Railroad Co., Ltd., commonly branded as Kotoden, is a regional transportation company serving Kagawa Prefecture on Shikoku, Japan. Its core business is passenger rail transport across the Takamatsu urban area and neighboring communities, supplemented by bus operations and related mobility services. The company operates three electric lines: the 32.9-kilometre Kotohira Line, linking central Takamatsu with Kotohira; the 14.6-kilometre Nagao Line, connecting Takamatsu with Nagao in Sanuki; and the 12.5-kilometre Shido Line, running from Kawaramachi to Kotoden-Shido. The network is standard gauge and uses 1,500 V DC electrification. Several services converge on Takamatsu-Chikko or Kawaramachi, providing connections with the wider Takamatsu transport system, including nearby JR Shikoku services. The modern company was formed on 1 November 1943 through the wartime consolidation of three earlier electric railway businesses. Those predecessors were Takamatsu Electric Tramway, established in 1909 and responsible for the Nagao corridor; Tosan Electric Railway, established in 1910 and associated with the Shido corridor; and Kotohira Electric Railway, established in 1924 and associated with the route toward Kotohira. The constituent lines were opened between 1911 and 1926. The merged company also absorbed nearby bus operations. Wartime bombing damaged parts of the network, but postwar reconstruction and expansion produced the basic network configuration recognizable today, including an extension to Takamatsu-Chikko Station near JR Takamatsu Station. Kotoden is notable for preserving and operating a diverse fleet acquired from other Japanese railway systems. Rolling stock from operators including Keikyu, Keio and Nagoya Municipal Subway contributed to the company’s informal reputation as a “moving train museum.” The railway also maintains heritage vehicles. Its service model combines regular interval timetables with peak-period strengthening, short workings and train-length adjustments, allowing a relatively small regional network to respond to commuting demand. Most trains operate in two-car formations, with longer formations used during busy periods on the Kotohira Line. The company experienced serious financial difficulty and filed for bankruptcy in 2001. A subsequent public discussion asked residents whether Kotoden was needed, helping shape a renewed civic-oriented identity. The wording of the Japanese question produced an association with the word for dolphin, and the company adopted a dolphin mascot in 2002 as a reminder of its aim to remain useful to local residents. In 2005 it introduced IruCa, an integrated-circuit ticketing system designed for local public transport use. Kotoden has also introduced operational and safety initiatives. In 1997 it adopted new track-safety measures in response to increasing railway suicides; the number of suicides on its tracks reportedly declined by 40 percent in the first year after implementation. Unlike many Japanese railway operators, it long retained staffed stations and resisted driver-only operation as a general cost-reduction measure. Driver-only operation was introduced across the Nagao Line in March 2023. In April 2022, following Russia’s invasion of Ukraine, the company placed a train in Ukrainian national colors and added a message supporting employees of Ukrzaliznytsia, Ukraine’s national railway. The Kotoden brand therefore combines local public-service responsibility, electric railway heritage, practical regional mobility and distinctive rolling-stock preservation. It remains primarily a Kagawa transport operator rather than a nationally diversified railway group, with its identity closely tied to Takamatsu, the Kotohira pilgrimage area, Sanuki and the wider cultural landscape of Shikoku.

History

The roots of Takamatsu-Kotohira Electric Railroad reach back to the early twentieth century, when several independently established electric railway companies began connecting Takamatsu with surrounding communities. Takamatsu Electric Tramway was founded in 1909 and opened the Nagao Line on 30 April 1912 between Dehare, near the present Kawaramachi area, and Nagao. The original line used 1,067 mm gauge track and 600 V DC electrification. It was later converted to standard gauge in June 1945, while the overhead voltage was increased to 1,500 V DC in December 1976. Tosan Electric Railway was established in 1910 and opened the Shido Line on 18 November 1911 between Imabashi and Shido, now represented by Kotoden-Shido Station. That line also began with 600 V DC electrification and was upgraded to 1,500 V DC in August 1966. A third predecessor, Kotohira Electric Railway, was established in 1924. It opened the route between Ritsurin-Koen and Takinomiya on 21 December 1926, laying the foundation for the present Kotohira Line. The present company was created on 1 November 1943 when the three railway businesses were merged during the wartime reorganization of transport enterprises. The new operator also absorbed bus businesses in the surrounding area. Parts of the railway were damaged by aerial bombing during the Pacific War. After 1945, reconstruction and network development continued, including the extension toward Takamatsu-Chikko, located a short walk from JR Shikoku’s Takamatsu Station. The network assumed essentially its current structure in the early 1950s. The company’s lines were progressively standardized and electrified at higher voltage. The three surviving routes now form a compact regional network: the 32.9 km Kotohira Line, the 14.6 km Nagao Line and the 12.5 km Shido Line. A separate 16 km branch between Busshozan and Shionoe operated from 1929 until 1941 and was replaced by bus service. In the late twentieth century, Kotoden developed measures intended to improve railway safety. In 1997 it introduced new precautions in response to rising railway suicides, with the reported number declining by 40 percent during the first year. The company’s history also includes an unusual approach to rolling stock. It inherited or purchased many trains from other Japanese operators, including Keikyu, Keio and Nagoya Municipal Subway. This variety led to the nickname “moving train museum,” while two heritage cars preserve aspects of the company’s railway history. Financial pressure culminated in a bankruptcy filing in 2001. The crisis was followed by a survey asking local residents whether they needed Kotoden. The public discussion became part of the company’s renewed local identity. A Japanese-language pun connecting the wording of the question with the word for dolphin inspired the adoption of a dolphin mascot in 2002. The mascot symbolized the company’s aspiration to be an organization that citizens considered necessary. Kotoden modernized fare collection in February 2005 with the introduction of the IruCa IC card system. The company marked the centenary of its railway origins in 2011. In the 2000s and 2010s it added stations on the Kotohira Line, including Kukodori on 29 July 2006 and Ayagawa on 15 December 2013. Fuseishi Station opened on 28 November 2020, alongside track improvements in the Sanjo–Ota section. Operationally, Kotoden has generally retained conventional staffed railway practices despite the spread of driver-only operation elsewhere in Japan. More than one-quarter of its stations remained staffed according to the referenced account. This policy changed on the Nagao Line in March 2023, when driver-only operation was introduced for all trains on that line. The company has also used public-facing initiatives to express solidarity beyond Japan: in April 2022, after Russia’s invasion of Ukraine, it placed a train painted in Ukrainian colors into service with a message supporting workers at Ukraine’s national railway. Today, Kotoden remains an active regional railway and transportation company based in Takamatsu. Its identity rests on the operation of three electric railway lines, associated bus services, local integration with the city and surrounding municipalities, and the preservation of an unusually varied fleet.

  • 2023

    Nagao Line driver-only operation introduced

    [1]

    All trains on the Nagao Line began operating under driver-only arrangements.

  • 2022

    Ukrainian solidarity train entered service

    [1]

    A train decorated in Ukrainian colors entered service on 19 April.

  • 2020

    Fuseishi Station opened

    [1]

    A new Kotohira Line station opened on 28 November.

  • 2005

    IruCa introduced

    [1]

    Kotoden launched its IC card ticketing system in February.

  • 2001

    Bankruptcy filing

    [1]

    The company filed for bankruptcy amid financial difficulty.

  • 1997

    Track-safety program introduced

    [1]

    Kotoden introduced additional safety precautions aimed at reducing railway suicides.

  • 1945

    Nagao Line regauged

    [1]

    The Nagao Line was converted from 1,067 mm gauge to standard gauge.

  • 1943

    Modern Kotoden company formed

    [1]

    The three railway businesses were merged on 1 November, and nearby bus operations were absorbed.

  • 1926

    Kotohira route opened

    [1]

    Kotohira Electric Railway opened the line between Ritsurin-Koen and Takinomiya on 21 December.

  • 1924

    Kotohira Electric Railway established

    [1]

    The third major predecessor of the modern company was founded.

Products and positioning

A locally rooted electric railway and multimodal public transportation operator serving Kagawa Prefecture.

  • Railway line · 1926

    Kotohira Line

    Kotoden’s longest route, extending 32.9 km between Takamatsu-Chikko in central Takamatsu and Kotoden-Kotohira in Kotohira. It is standard gauge, electrified at 1,500 V DC and mostly single track, with double-tracked sections in central Takamatsu and between Sanjo and Ota. The line provides regular half-hourly all-day service and additional short-working and peak-period services.

  • Railway line · 1912

    Nagao Line

    A 14.6 km standard-gauge electric route connecting the Takamatsu area with Nagao in Sanuki. Although its formal starting point is Kawaramachi, trains generally operate through to Takamatsu-Chikko. The line uses regular interval service, with shorter headways during peak periods, and introduced driver-only operation for all trains in March 2023.

  • Railway line · 1911

    Shido Line

    The 12.5 km Shido Line runs between Kawaramachi and Kotoden-Shido. It is a single-track, standard-gauge line electrified at 1,500 V DC. The route operates regular services at intervals coordinated broadly with the Nagao Line and adds shorter peak-period services between Kawaramachi and Omachi.

  • IC ticketing system · 2005

    IruCa

    An integrated-circuit fare card system introduced by Kotoden in February 2005. IruCa supports electronic ticketing for the company’s local transportation services and forms part of Kotoden’s modernization of fare collection.

  • Railway heritage

    Heritage rolling stock

    Kotoden maintains two heritage cars and operates a fleet assembled from vehicles originating with several Japanese railway systems. Acquired rolling stock from operators such as Keikyu, Keio and Nagoya Municipal Subway has given the company a distinctive fleet and its widely used “moving train museum” description.

Marketing campaigns

  • 2022Ukraine solidarity train

    Kagawa Prefecture, Japan

    In response to the 2022 invasion of Ukraine, Kotoden painted a train in Ukrainian colors and added a message supporting employees of Ukrzaliznytsia, Ukraine’s national railway.

    Outcome. The decorated train entered passenger service on 19 April 2022.

    Source
  • 2002Dolphin mascot and civic-need identity

    Kagawa Prefecture, Japan

    After the company’s 2001 bankruptcy filing, a public survey asked residents whether Kotoden was needed. A Japanese word association involving the wording of the question led to the adoption of a dolphin mascot, which became a reminder that the company should remain useful to local citizens.

    Outcome. The dolphin became part of Kotoden’s civic-facing identity.

    Source

Brand decisions

  • 2023

    Nagao Line driver-only operationStrategy

    Background

    Japanese railways have increasingly used driver-only operation to control operating costs, while Kotoden had historically retained conventional staffed operation on much of its network.

    Action taken

    Driver-only operation was introduced for every train on the Nagao Line in March.

    Aftermath

    The change marked a shift in Kotoden’s operating model, although the available reference does not quantify its financial or service effects.

    Source

  • 2005

    IruCa IC ticketing launchProduct launch

    Background

    Kotoden sought to modernize local fare collection and ticketing.

    Action taken

    The company introduced the IruCa integrated-circuit card system in February.

    Aftermath

    IruCa became part of the company’s electronic fare-payment offering.

    Source

  • 2001

    Bankruptcy filing and civic reviewOther

    Background

    Financial difficulties led Kotoden to file for bankruptcy. The crisis prompted a survey asking local residents whether they considered the railway necessary.

    Action taken

    The company entered bankruptcy proceedings and used the ensuing public discussion as part of a renewed local-service identity.

    Aftermath

    The public engagement was followed by adoption of the dolphin mascot in 2002 and later modernization initiatives including IruCa.

    Source

Sources1 sources

  1. 1Takamatsu-Kotohira Electric Railroaden.wikipedia.org

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