Sōtetsu Main Line

Sōtetsu Main Line
Sōtetsu Main Line
	A 20000 series EMU in October 2020
Overview
Native name	相鉄本線
Owner	Sagami Railway (Sotetsu)
Locale	Kanagawa Prefecture
Termini	Yokohama; Ebina;
Stations	18
Service
Type	Commuter rail
Depot(s)	Kashiwadai Station
Daily ridership	566,657 (FY2010)[1]
History
Opened	12 May 1926
Technical
Line length	24.6 km (15.3 mi)
Track gauge	1,067 mm (3 ft 6 in)
Electrification	1,500 V DC overhead catenary
Operating speed	100 km/h (60 mph)
Route map
	23.8
	0.0
	-
	2.2

The Sōtetsu Main Line (相鉄本線, Sōtetsu Honsen) is a railway line in Kanagawa Prefecture, Japan, operated by the private railway operator Sagami Railway (Sotetsu). It connects Yokohama and Ebina.

Services

Services on the Main Line are divided into four categories. Some trains travel along the Izumino Line west of Futamata-gawa to Shōnandai.

Local (各停) - services stop at all stations. They do not travel from end to end; services are split at Futamata-gawa, with trains running between Yokohama and Futamata-gawa and between Futamata-gawa and either Ebina or Shōnandai.
Rapid (快速) - services stop between Yokohama and Futamata-gawa at Hoshikawa, Nishiya and Tsurugamine, and at all stations from Futamata-gawa to either Ebina or Shōnandai.
Commuter Express (通勤急行 or 通急) - services stop between Yokohama and Futamata-gawa at Nishiya and Tsurugamine, and at all stations from Futamata-gawa to either Ebina or Shōnandai.
Commuter Limited Express (通勤特急 or 通特) services between Shōnandai and Shin-yokohama and continue through running on either the Tokyu Toyoko Line or Meguro Line and their subsequent through services.
Limited Express (特急) services stop between Yokohama and Ebina at Nishiya, Futamata-gawa and Yamato.

Stations

Local trains and JR Direct Local trains stop at all stations; for all other train types, trains stop at stations marked ●, pass stations marked | .
Commuter Express and Commuter Limited Express trains stop at stations marked ↑ .
- R: Rapid
- CE: Commuter Express
- L: Limited Express
- JR: Limited Express service via Saikyō Line
- TK: Commuter Limited Express service via Tokyu Railways

No.	Station	Japanese	Distance (km)	R	C E	L	J R	T K	Transfers	Location
	Yokohama	横浜	0.0	●	●	●			JT Tokaido Main Line JK Keihin-Tōhoku Line JK Negishi Line JO Yokosuka Line TY Tōkyū Tōyoko Line KK Keikyū Main Line Yokohama City Transportation Bureau: Yokohama Municipal Subway Blue Line Minatomirai Line	Nishi-ku, Yokohama
	Hiranumabashi	平沼橋	0.9	\|	↑	\|
	Nishi-Yokohama	西横浜	1.8	\|	↑	\|
	Tennōchō	天王町	2.4	\|	↑	\|				Hodogaya-ku, Yokohama
	Hoshikawa	星川	3.3	●	↑	\|
	Wadamachi	和田町	4.3	\|	↑	\|
	Kamihoshikawa	上星川	5.0	\|	↑	\|
Upbound through services				Sōtetsu Shin-yokohama Line Sōtetsu–JR Direct Line from Hazawa yokohama-kokudai to Kawagoe SH Tōkyū Shin-yokohama Line from Shin-yokohama to Hiyoshi MG Tōkyū Meguro Line for Meguro I Toei Subway Mita Line for Nishi-takashimadaira N Tokyo Metro Namboku Line for Akabane-iwabuchi SR Saitama Railway Line for Urawa-misono TY Tōkyū Tōyoko Line for Shibuya F Tokyo Metro Fukutoshin Line for Wakōshi Tōbu Tōjō Line for Ogawamachi
	Nishiya	西谷	6.9	●	●	●	●	●	Sōtetsu Shin-yokohama Line	Hodogaya-ku
	Tsurugamine	鶴ヶ峰	8.5	●	●	\|	\|	●		Asahi-ku, Yokohama
	Futamata-gawa	二俣川	10.5	●	●	●	●	●	Izumino Line	Asahi-ku, Yokohama
Downbound through service				Izumino Line for Shōnandai
	Kibōgaoka	希望ヶ丘	12.2	●	●	\|	\|			Asahi-ku
	Mitsukyō	三ツ境	13.6	●	●	\|	\|			Seya-ku, Yokohama
	Seya	瀬谷	15.5	●	●	\|	\|			Seya-ku, Yokohama
	Yamato	大和	17.4	●	●	●	●		Odakyu Enoshima Line	Yamato
	Sagami-Ōtsuka	相模大塚	19.3	●	●	\|	\|			Yamato
	Sagamino	さがみ野	20.5	●	●	\|	\|			Ebina
	Kashiwadai	かしわ台	21.8	●	●	\|	\|
	Ebina	海老名	24.6	●	●	●	●		Odakyu Odawara Line Sagami Line

Rolling stock

Non-revenue-earning stock

2000 series
ED10 electric locomotives

History

The line opened on 12 May 1926 as the steam-operated Jinchu Railway (神中鉄道, Jinchū Tetsudō) between Futamata-gawa and Atsugi (on the present-day Sagami Line).[2] The line was extended from Futamata-gawa to Yokohama in December 1933, and from the former station at Sagami-Kokubu (相模国分) (now closed) in November 1941.[2]

The line became the Sagami Railway Jinchu Line (相模鉄道神中線) from 1 April 1943.[2] However, when the line was commissioned to Tōkyū due to the financial difficulties of the Sagami Railway, it was renamed as the "Tōkyū Atsugi Line" (東急厚木線) until the end of the commission in 1947.

Work to electrify the line commenced in June 1942, with the entire line between Yokohama and Ebina electrified by 20 September 1944.[2]

Work to double-track the line commenced in January 1957 between Yokohama and Nishi-Yokohama. The entire line was double-tracked by March 1974.[2]

The first air-conditioned trains (4-car 6000 series EMUs) were introduced on the line on 3 July 1971.[2]

10-car trains started operating on the line from 6 April 1981.[2]

Station ticket barriers were modified to allow use of the Passnet magnetic farecard from 1 October 2000.[2]

There was a short spur line which branched from Sagamino Station to the Naval Air Facility Atsugi air base. While the track remains in place up to the fence of the base, the line is no longer in use.

In order to improve safety and efficiency, a 2.8 km (1.7 mi) section around Tsurugamine Station is being transitioned to an underground structure.[3] The underground track section and new station building is expected to be completed in 2034.[3]

On a side note, what is known today as the Sagami Line had been constructed and owned by Sōtetsu, until 1944 it was acquired by the government during World War II. After the war, the government and Sōtetsu never reached any agreement to return the line to Sōtetsu, and it is run by JR East today.

March 2023 timetable revision

The Sōtetsu Shin-yokohama Line connects Nishiya to Hazawa Yokohama-Kokudai, Shin-Yokohama and further to the Tōkyū Shin-yokohama Line. Through service to the Saikyō Line began on 30 November 2019 while services to the Tōkyū Shin-Yokohama Line began on 18 March 2023.[4]

With the opening of this new line, Limited Express and Rapid services make a stop at Nishiya, which facilitates transfer between services to central Yokohama and the Tokyo Metropolis.

In addition, two new service types will be implemented.[5] They are the Commuter Limited Express (通勤特急) and Commuter Express (通勤急行) services, which both operate through services from / to the Izumino Line. The former service will replace the current Express on the Izumino Line, and will make additional stops at Nishiya and Tsurugamine. The latter service is a brand new service, making stops at all stations west of Nishiya.[6]

References

Sagami Railway station ridership in 2010 Train Media (sourced from Sagami Railway) Retrieved May 28, 2012.
Terada, Hirokazu (July 2002). データブック日本の私鉄 [Databook: Japan's Private Railways]. Japan: Neko Publishing. p. 74/217. ISBN 4-87366-874-3.
"相鉄・鶴ケ峰駅付近「地下化」事業認可都市計画など手続き完了、10月以降に着工へ" [Planning for the Grade Separation of Tsurugamine Station Approved, construction to start after October]. news.railway-pressnet.com (in Japanese). 23 June 2022. Archived from the original on 23 June 2022. Retrieved 15 September 2022.
"相模鉄道，3月18日にダイヤ改正を実施" [Sagami Railway implements timetable revision on March 18]. Japan Railfan Magazine Online (in Japanese). Archived from the original on 17 December 2022. Retrieved 17 December 2022.
"ＪＲ線との相互直通運転開始により１１月３０日(土)新ダイヤでの運行を開始特急・快速の停車駅変更、通勤特急・通勤急行を導入" [New Timetable to begin on 30 November (Saturday) with the initiation of through services to JR Lines; Changes to stopping patterns of Limited Express and Rapid services; Implementation of Commuter Limited Express and Commuter Express services] (PDF). Sotetsu. 16 July 2019.
"相鉄から急行列車が姿を消す" [Sotetsu Express services have been abolished]. Japan Railfan Magazine Online (in Japanese). 18 March 2023. Archived from the original on 18 March 2023. Retrieved 19 March 2023.

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[ridership-1] Sagami Railway station ridership in 2010 Train Media (sourced from Sagami Railway) Retrieved May 28, 2012.

[terada2002-2] Terada, Hirokazu (July 2002). データブック日本の私鉄 [Databook: Japan's Private Railways]. Japan: Neko Publishing. p. 74/217. ISBN 4-87366-874-3.

[:0-3] "相鉄・鶴ケ峰駅付近「地下化」事業認可都市計画など手続き完了、10月以降に着工へ" [Planning for the Grade Separation of Tsurugamine Station Approved, construction to start after October]. news.railway-pressnet.com (in Japanese). 23 June 2022. Archived from the original on 23 June 2022. Retrieved 15 September 2022.

[:02-4] "相模鉄道，3月18日にダイヤ改正を実施" [Sagami Railway implements timetable revision on March 18]. Japan Railfan Magazine Online (in Japanese). Archived from the original on 17 December 2022. Retrieved 17 December 2022.

[5] "ＪＲ線との相互直通運転開始により１１月３０日(土)新ダイヤでの運行を開始特急・快速の停車駅変更、通勤特急・通勤急行を導入" [New Timetable to begin on 30 November (Saturday) with the initiation of through services to JR Lines; Changes to stopping patterns of Limited Express and Rapid services; Implementation of Commuter Limited Express and Commuter Express services] (PDF). Sotetsu. 16 July 2019.

[6] "相鉄から急行列車が姿を消す" [Sotetsu Express services have been abolished]. Japan Railfan Magazine Online (in Japanese). 18 March 2023. Archived from the original on 18 March 2023. Retrieved 19 March 2023.

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