|Locale||Kagawa, Ehime Prefectures|
|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 (80 mph)|
The Yosan Line (予讃線 Yosan-sen?) is the principal railway line on the island of Shikoku in Japan, connecting the major cities of Shikoku, and via the Honshi-Bisan Line, with Honshu. It is operated by the Shikoku Railway Company (JR Shikoku), and is aligned approximately parallel with the Inland Sea coast, connecting the prefectural capitals of Takamatsu (Kagawa Prefecture) and Matsuyama (Ehime Prefecture) and continuing on to Uwajima. The name of the line comes from Iyo (伊予?) and Sanuki (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 the Uchiko 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 the Dosan Line, connected with the Rail Ferry (from Uno) at Takamatsu Station. Direct services from Okayama now operate with the completion of the Great Seto Bridge system, over which the Honshi-Bisan Line travels.
- Operators, distances:
- 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:
- Midnight Express Takamatsu
- Sunrise Seto
- Midnight Express Matsuyama
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 762mm (2'6") gauge line was opened from Iyo Nagahama - Iyo Ozu, with the line being privatised in 1933. The line from Matsuyama was extended in sections to Iyo Nagahama between 1927-35, with the former private line being regauged to 1067mm (3'6") gauge in 1935. Further western extensions opened 1936-45, when Uwajima (and the Yodo 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 the Japanese 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 former Uchicko branch and shortening the route by 6.3km.
The Takamatsu - Tadotsu section was electrified in 1987, enabling direct Takamatsu - Okayama services when the Seto Ohashi Bridge system opened the following year.
The Iyo Hojo - Matsumoto - 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.
Former connecting lines
Sakaide station -
- The Kotohira Express Railway Co. operated a 16km line to Kotohira on the Dosan Line 1930-44, with the line formally closing in 1954.
- The Kotohira Sangu Railway Co. operated a 27km line to Tadotsu 1922/28 - 63, with a 7km branch to Kotohira operated 1923-63.
Niihama Station - The Sumitomo Copper Co. operated a 15km 762mm gauge line to Hinokiogawa (known as the 'bottom line') opened in 1893 which included a 3km duplicated section. It carried passengers 1929-55, and was electrified at 600v DC in 1950. The mine closed in 1973 and the railway 4 years later. An isolated 5.5km 762mm line, situated at 800m 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 the Shiokaze, Ishizuchi, Uwakai and other limited express services, please see their respective articles.
- "●": all trains stop; "▲": some trains stop; "｜": all trains pass
- "∥": double-track section; "◇": single-track section (passing allowed); "｜": single-track section (no passing); "v" & "^": transition to/from double-track section
Takamatsu – Iyo-Saijō
- Sunport: Includes Sunport Nanpū Relay-Gō rapid service; non-rapid Nanpū Relay-Gō trains stop at every station.
|Y00||Takamatsu||高松||-||0.0||●||●||■ Kōtoku Line (T28)
Kotoden Kotohira Line (Takamatsu-Chikkō)
|Takamatsu Freight Terminal||高松貨物ターミナル||1.3||4.7||｜||｜||∥|
|Y08||Sakaide||坂出||2.7||21.3||●||●||Honshi-Bisan Line (Seto-Ōhashi Line: Marine Liner through service[* 1])||∥|
|Y09||Utazu||宇多津||4.6||25.9||●||Honshi- Bisan Line through service||Honshi-Bisan Line (Seto-Ōhashi Line: some trains through to Tadotsu and Takamatsu[* 1])||∥||Utazu, Ayauta District|
|Y12||Tadotsu||多度津||2.7||32.7||●||■ Dosan Line (D12) (some trains through towards Utazu)||∨||Tadotsu, Nakatado District|
- Trains traveling through onto the Honshi-Bisan Line from Takamatsu do not serve Utazu but pass through it; this is reflected in fare calculations.
- Tsushimanomiya Station opens only during the August 4 and 5 summer festival at the nearby Tsushima Shrine. Among seasonal stations the station has the shortest number of operating days per year in Japan.
Iyo-Saijō – Iyo-Nagahama – Uwajima
- All stations located in Ehime Prefecture.
|(continued from above)|
|Matsuyama||松山||3.7||194.4||Iyotetsu Ōtemachi Line (Matsuyama-Ekimae)||◇|
|U02||Kita-Iyo||北伊予||2.4||200.3||◇||Masaki, Iyo District|
|U05||Iyoshi||伊予市||1.2||206.0||■ Iyotetsu Gunchū Line (Gunchūkō)||◇|
|Mukaibara||向井原||2.5||208.5||■ Yosan Line (for Uchiko)||｜||Iyo|
|Iyo-Wakamiya Junction||伊予若宮信号場||-||(247.1)||Official junction of Uchiko branch||◇|
|Iyo-Ōzu||伊予大洲||3.8||249.5||■ Yosan Line (for Niiya)||◇|
|U27||Kita-Uwajima||北宇和島||2.2||296.1||■ Yodo Line (G46)[** 1]||◇|
|U28||Uwajima||宇和島||1.5||297.6||■ Yodo Line (G47)||∧|
- Although the official start of the Yodo Line is at Kita-Uwajima, all trains run through to/from Uwajima
Mukaibara – Uchiko – Iyo-Ōzu
- Station list includes the Uchiko Line section between Uchiko and Niiya.
- All stations located in Ehime Prefecture.
|■ Yosan Line (for Matsuyama (U06), Iyo-Nagahama (S06))
All trains through to Iyoshi and/or Matsuyama
|U09||Iyo-Tachikawa||伊予立川||6.7||16.9||225.4||◇||Uchiko, Kita District|
|Iyo-Wakamiya Junction||伊予若宮信号場||-||(3.5)||(240.8)||Official junction of Iyo-Nagahama branch||◇|
|U14||Iyo-Ōzu||伊予大洲||5.9||5.9||243.2||■ Yosan Line (for Uwajima (U14), Iyo-Nagahama (S18))
Some trains through to Uwajima
This article incorporates material from the corresponding article in the Japanese Wikipedia
- "「アンパンマントロッコ」東北へ、被災地の子供たちに笑顔と元気をお届け!". Retrieved April 4, 2012.
Media related to Yosan Line at Wikimedia Commons
- JR Shikoku official website (Japanese)