Yosan Line
7000 series near Tsushimanomiya Station
Overview
Locale	Kagawa,Ehime Prefectures
Termini	Takamatsu Uwajima
Stations	94
Service
Type	Heavy rail
Operator(s)	JR Shikoku
History
Opened	1889
Technical
Line length	297.6 km (184.9 mi)
Track gauge	1,067 mm (3 ft 6 in)
Electrification	Takamatsu — Iyoshi (1,500 V DC)
Operating speed	130 km/h (81 mph)
Route map

TheYosan Line (予讃線,Yosan-sen) is the principal railway line on the island ofShikoku in Japan, connecting the major cities of Shikoku, and via theHonshi-Bisan Line, with Honshu. It is operated by theShikoku Railway Company (JR Shikoku), and is aligned approximately parallel with theInland Sea coast, connecting theprefectural capitals ofTakamatsu (Kagawa Prefecture) andMatsuyama (Ehime Prefecture) and continuing on toUwajima. The name of the line comes fromIyo (伊予) andSanuki (讃岐), the old names of Ehime and Kagawa, respectively.

The line consists of two alignments between Mukaibara and Iyo-Ōzu. The original main line follows the coast via Iyo-Nagahama, while the direct line, opened in 1986 as a bypass of the lengthy coastal route, goes through the mountains via Uchiko, part of which is known as theUchiko Line (as it was originally part of the Uchiko branch), and all limited express trains now use this route.

Until 1988 the Yosan Line, along with theDosan Line, connected with the Rail Ferry (fromUno) atTakamatsu Station. Direct services from Okayama now operate with the completion of theGreat Seto Bridge system, over which theHonshi-Bisan Line travels.

• Operators, distances:
  • Shikoku Railway Company (JR Shikoku) (Services and tracks)
    • Takamatsu — Uwajima: 297.6 km (184.9 mi)
    • Mukaibara — Uchiko: 23.5 km (14.6 mi)
    • Niiya — Iyo-Ōzu: 5.9 km (3.7 mi)
  • Japan Freight Railway Company (JR Freight) (Services)
    • Takamatsu – Iyo-Yokota: 203.0 km (126.1 mi)
• Double-tracked section: Takamatsu – Tadotsu
• Railway signalling:Centralized Traffic Control (CTC)
• Maximum speed:
  • Takamatsu – Matsuyama: 130 km/h (80 mph)
  • Matsuyama – Uchiko, Iyo-Iwaki – Unomachi: 120 km/h (75 mph)
  • Other sections: 110 km/h (70 mph)

As the most important trunk line of Shikoku, the line has many limited express services. These include:

• Ishizuchi
• Midnight Express Takamatsu
• Shiokaze
• Uwakai
• Shimanto
• Nanpū
• Uzushio
• Sunrise Seto
• Midnight Express Matsuyama

There are two rapid services. TheSunport Nanpū Relay-Gō rapid service connects Takamatsu and Iyo-Saijō. TheMarine Liner rapid service connects Takamatsu with Okayama via theSeto-Ōhashi Line.

Local service typically serves one of four sections of the Yosan Line, generally divided at Kan'onji, Iyo-Saijō, and Matsuyama.

The first segment of the line, from Tadotsu to Marugame, was constructed by the Sanuki Railway Co. and commenced operation in 1889. The Marugame - Takamatsu section opened in 1897, and in the company was nationalised in 1906.

The line was extended west from Tadotsu in sections commencing in 1913, reaching Matsuyama in 1927. Further west, a private 762 mm (2 ft 6.0 in) gauge line was opened from Iyo Nagahama - Iyo Ozu, with the line being nationalised in 1933. The line from Matsuyama was extended in sections to Iyo Nagahama between 1927 and 1935, with the former private line being regauged to 1,067 mm (3 ft 6.0 in) gauge in 1935. Further western extensions opened 1936–45, when Uwajima (and theYodo Line) was connected to the Yosan line.

On August 1, 1933, the entire line was renamed the Yosan Main Line. In 1987, with the privatization of theJapanese National Railways, the line became simply the Yosan Line.

The Takamatsu - Tadotsu section was duplicated 1965–70, and CTC signalling commissioned in 1985 between Takamatsu - Matsuyama. The 'direct line' between Mukaibara - Iyo Ozu (including the 6,012m Inuyose tunnel) opened in 1986, incorporating part of the formerUchicko branch and shortening the route by 6.3 km.

The Takamatsu - Tadotsu section was electrified in 1987, enabling direct Takamatsu - Okayama services when theSeto Ohashi Bridge system opened the following year.

The Iyo Hojo - Matsuyama - Iyoshi section was electrified in 1990, with the Tadotsu - Imabari section being energised in 1992, and the Imabari - Iyo Hojo section in 1993, enabling direct Matsuyama - Okayama electric services to be introduced.

Following theTohoku major earthquake in 2011, JR Shikoku,JR East, andJR Freight announced that JR Shikoku's popularAmpanman Torokko Train would tour areas devastated by the earthquake and tsunami.^[1]

Sakaide station -

• The Kotohira Express Railway Co. operated a 16 km line to Kotohira on theDosan Line 1930–44, with the line formally closing in 1954.
• The Kotohira Sangu Railway Co. operated a 27 km line to Tadotsu 1922/28 - 63, with a 7 km branch to Kotohira operated 1923–63.

Niihama Station - The Sumitomo Copper Co. operated a 15 km 762 mm gauge line to Hinokiogawa (known as the 'bottom line') opened in 1893 which included a 3 km duplicated section. It carried passengers 1929–55, and was electrified at 600 V DC in 1950. The mine closed in 1973 and the railway 4 years later. An isolated 5.5 km 762 mm line, situated at 80 0m elevation (known as the 'top line') and connected to the bottom line by a cableway operated 1893–1911.

• Local trains stop at every station.
• For information on theShiokaze,Ishizuchi,Uwakai and other limited express services, please see their respective articles.

Legend

Station: "●": all trains stop; "▲": some trains stop; "｜": all trains pass

Track: "∥": double-track section; "◇": single-track section (passing allowed); "｜": single-track section (no passing); "v" & "^": transition to/from double-track section

• Sunport: IncludesSunport Nanpū Relay-Gō rapid service; non-rapidNanpū Relay-Gō trains stop at every station.

• All stations located inEhime Prefecture.

• Station list includes theUchiko Line section between Uchiko and Niiya.
• All stations located in Ehime Prefecture.

• List of railway lines in Japan

This article incorporates material from the corresponding article in the Japanese Wikipedia

Media related toYosan Line at Wikimedia Commons

• JR Shikoku official website

• Yosan Line
• Lines of Shikoku Railway Company
• 1067 mm gauge railways in Japan
• Railway lines opened in 1889

• Articles with short description
• Short description matches Wikidata
• Articles containing Japanese-language text
• Commons category link from Wikidata
• Official website not in Wikidata