, officially for short, is a transportation company in Kagawa Prefecture, on the island of Shikoku, Japan. With headquarters in Takamatsu, the company operates three passenger railway lines, as well as bus subsidiaries. It was established on 1 November 1943. In 2021, it reported sales of ÃÂ¥2,881,000,000 with a capitalization of ÃÂ¥250,000,000.
The company traces its origins to 1909, when was founded. This company opened the Nagao line on 30 April 1912 between Dehare (åºæ´) (close to the present Kawaramachi Station) and Nagao Station. The line was originally 1,067 mm (3 ft 6 in) gauge and electrified at 600V DC, but it was regauged to 1,435 mm (4 ft 8+1âÂÂ2 in) in June 1945, and the overhead line voltage was raised to 1500V DC in December 1976.
In 1910, was established, and opened the Shido line on 18 November 1911 between Imabashi and Shido Station (now Kotoden-Shido). The line was electrified at 600V DC, and increased to 1500V DC in August 1966.
In 1924, was established, opened a line on 21 December 1926 between Ritsurin-KÃ Âen and Takinomiya.
In 1943, the modern-day company, Kotoden, was established by the wartime merger of these three rail lines in the Takamatsu area. Immediately after its establishment, it absorbed the bus transportation operations in the vicinity. Aerial bombing destroyed some lines during the Pacific War. After the war, the company extended its line to Takamatsu Chikkà  Station, a few minutes walk from JR Shikoku's Takamatsu Station. Its network took its present form in the early 1950s.
Since the beginning of the 21st century, three new stations have opened on the Kotohira Line: Kà «kà Âdà Âri on 29 July 2006, Ayagawa on 15 December 2013, and Fuseishi on 28 November 2020.
Kotoden operates three lines:
A 16 km line from Busshozan (on the Kotohira line) to Shionoe operated between 1929 and 1941. It was replaced by a bus service.
Kotoden operates a pattern timetable on all three lines.
The variation in peak vs. off-peak demand/frequencies is also used in a smart way to get the trains in and out of their respective depots, so that very little empty runs are needed. Four trainsets start and end in Kotohira, two in Takinomiya and another four at the main depot, located at Busshozan station. Basically, all services are operated with two cars, but during the peak hours, most trains are operated with four cars. The lengthening/shortening of the trains is done in Busshozan.
Basically, all trains run end to end, but shorter workings (starting/ending in Hiragi or Kawaramachi) are used to get the trains in and out of the depots. Three trains start and end in Nagao, three trains in Kawaramachi and one train in Hiragi. The eighth trainset starts/ends in Takamatsu-Chikkà  (empty running from/to the main Busshozan depot for cleaning/maintenance). All trains run in a two-car formation.
Except for the extra peak hour services, all trains run end to end. Two trains start in Shido and four trains in Kawaramachi (Imabashi depot). All trains run in a two-car formation.
Having inherited most of its rolling stock from different areas across Japan (notably, Keikyu, Keià  and Nagoya Municipal Subway), Kotoden is also known as the âÂÂMoving Train MuseumâÂÂ
As of October 2020, Kotoden has 80 passenger cars. Of these, 40 were in use on the Kotohira Line, 20 on the Nagao Line, and 20 on the Shido Line. It also has two heritage cars.
In 1997, the railroad was the first to introduce new track safety precautions in order to combat the rising number of rail suicides. In the first year after new measures were implemented, the number of suicides on Kotoden tracks fell by 40%.
In 2001, Kotoden filed for bankruptcy. This was followed by a survey, asking residents, âÂÂDo you need Kotoden or not?". In Japanese, this question ends with the phrase "iru ka", which sounds the same as the Japanese word for âÂÂdolphinâÂÂ. As a result, Kotoden chose a dolphin as its mascot in 2002. In doing so, the company always reminds itself to become a company needed by the citizens.
In February 2005, the company introduced an IC card ticketing system named IruCa.
In 2011, Kotoden celebrated their 100th anniversary.
Despite other rail companies introducing "one-man" or driver-only operation in order to reduce operational expenses, Kotoden previously chose not to do so. More than a quarter of its stations also remain staffed. However, in March 2023, driver-only operation was introduced for all trains on the Nagao Line.
In the wake of the 2022 invasion of Ukraine, Kotoden painted one of its trains in the colors of the Ukrainian flag, along with a message in support for the employees of Ukrzaliznitsya. The train entered service on 19 April 2022.