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Isumi Line

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Isumi Line

Isumi Line
Isumi 200 series diesel car near Higashi-Fusamoto Station, April 2009
Overview
Locale Chiba Prefecture
Termini Ōhara
Kazusa-Nakano
Stations 14
Operation
Opening 1930
Operator(s) Isumi Railway Company
Depot(s) Ōtaki
Rolling stock Isumi 200 series diesel railcars
Technical
Line length 26.8 km (16.7 mi)
Track gauge
Minimum radius 200 m
Operating speed 65 km/h (40 mph)

The Isumi Line (いすみ線 Isumi-sen?) is a railway line in Chiba Prefecture, Japan, operated by the third sector Isumi Railway Company. It extends through the center eastern the Bōsō Peninsula, running from Ōhara Station in the city of Isumi, where it connects with the Sotobō Line, to Kazusa-Nakano Station in the town of Ōtaki, where it connects with the Kominato Line.

Station list

Station name Japanese Distance
(km)
Transfers Location
Ōhara 大原 0.0 Sotobō Line Isumi
Nishi-Ōhara 西大原 1.7  
Kazusa-Azuma 上総東 5.2  
Nittano 新田野 7.4  
Kuniyoshi 国吉 8.8  
Kazusa-Nakagawa 上総中川 11.9  
Shiromigaoka 城見ヶ丘 14.7   Ōtaki
Ōtaki 大多喜 15.8  
Koyamatsu 小谷松 18.2  
Higashi-Fusamoto 東総元 19.6  
Kugahara 久我原 20.8  
Fusamoto 総元 22.2  
Nishihata 西畑 25.1  
Kazusa-Nakano 上総中野 26.8 Kominato Line

Rolling stock

  • Isumi 200 series single-car DMUs
  • Isumi 300 series single-car DMUs (since March 2012)
  • Isumi 350 series single-car DMU (since 2013)
  • KiHa 52 DMU car KiHa 52-125 (from JR West)
  • KiHa 28 DMU car KiHa 28 2346 from JR West)
  • KiHa 30 DMU car Kiha 30 62 (from JR East)

The line uses a fleet of seven LE-Car II series diesel railcars classified "Isumi 200 series".[1]

In December 2010, former JR West KiHa 52 diesel car KiHa 52-125, formerly used on the Ōito Line was purchased by the Isumi Railway. This was repainted into JNR standard red and cream livery before entering revenue service.[2]

From March 2012, two new Isumi 300 series diesel cars entered service on the line. Built by Niigata Transys, these feature transverse seating and toilets.[3]

On 11 October 2012, a former JR West KiHa 28 DMU car, KiHa 28 2346, was delivered to the line. This will be used in conjunction with the KiHa 52 125 car.[4]

In January 2013, a JR East KiHa 30 DMU car, KiHa 30 62, previously used on the Kururi Line was delivered to the line.[5]

In 2013, a new Isumi 350 series diesel car was delivered. Built by Niigata Transys, this car is based on the Isumi 300 series design, but has longitudinal seating and no toilet. Designed to resemble the JNR KiHa 20 series DMU, the car is finished in the standard Isumi Railway livery of yellow with green bodyside stipes.[6]

History

Plans for the Isumi Line were drafted by the Railway Ministry under Railway Construction Act in 1922. However, the route already had an existing 609 mm (2 ft) gauge human-powered tramway, which had been opened by the Chiba Prefectural government on 15 December 1912 to connect Ōhara and Ōtaki. Local opposition and the deficit situation of the existing line delayed construction, which did not begin until 1925. The tramway was bought out by the Japanese Government Railways in 1927, and the first section of the new Kihara Line (木原線?) was opened on 1 April 1930. The line was extended to Fusamoto by August 25, 1933 and to its present terminus at Kazusa-Nakano on 26 August 1934.[1] As its name implies, the Kihara line was originally intended to connect Ōhara with Kisarazu. However, it was never extended further than Kazusa-Nakano.

In 1954, the first JNR diesel railbus, the KiHa 10000, was introduced on the Kihara Line.[1] Four additional stations were added on June 20, 1960 (Nishi-Ōhara, Nittano, Koyamatsuand Kugahara). However, on September 4, 1968 the line was listed as one of 83 money-losing local lines recommended for closure. The line problems were compounded in the summer of 1970, when heavy rains washed out a portion of the track, causing a suspension of operations from July 1 through October 1. Scheduled freight operations were suspended from October 1, 1974. On September 18, 1981, the line was again recommended for closure.[1]

After the breakup and privatization of the JNR on April 1, 1987, the line came under the control of the JR East.

The Isumi Line came into being on 24 March 1988 following the transfer of the assest of the former Kihara Line to the newly formed third sector operator Isumi Railway Company.[1]

The Isumi Railway has attempted to increase revenues by selling naming rights to stations to local industries, leading to some confusion on the correct station names.

References

External links

  • (Japanese)

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