Sōtetsu Main Line

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.

• All stations are located in Kanagawa Prefecture.
• Local trains stop at all stations; For all other train types, trains stop at stations marked ●, and pass stations marked | and ↑.
• Commuter Limited Express services stop at stations marked ▲.

More information No., Station ...

No.	Station	Japanese	Distance (km)		Rapid	Comm. Exp.	Ltd. Exp. Comm. Ltd. Exp.	Transfers	Location
			Between Stations	Total
	Yokohama	横浜	0.0	0.0	●	●	●	Tōkaidō Line Keihin–Tōhoku Line Yokohama Line Negishi Line Yokosuka Line Shōnan–Shinjuku Line Tōyoko Line Main Line Blue Line Minatomirai Line	Nishi-ku, Yokohama
	Hiranumabashi	平沼橋	0.9	0.9	|	↑	|
	Nishi-Yokohama	西横浜	0.9	1.8	|	↑	|
	Tennōchō	天王町	0.6	2.4	|	↑	|		Hodogaya-ku, Yokohama
	Hoshikawa	星川	0.9	3.3	●	↑	|
	Wadamachi	和田町	1.0	4.3	|	↑	|
	Kamihoshikawa	上星川	0.7	5.0	|	↑	|
Upbound through services					Sōtetsu Shin-yokohama Line Sōtetsu–JR Direct Line from Hazawa yokohama-kokudai to Kawagoe Tōkyū Shin-yokohama Line from Shin-yokohama to Hiyoshi Meguro Line for Meguro Mita Line for Nishi-takashimadaira Namboku Line for Akabane-iwabuchi Saitama Railway Line for Urawa-misono Tōyoko Line for Shibuya Fukutoshin Line for Wakōshi Tojo Line for Ogawamachi
	Nishiya	西谷	1.9	6.9	●	●	●	Sōtetsu Shin-yokohama Line	Hodogaya-ku
	Tsurugamine	鶴ヶ峰	1.6	8.5	●	●	▲		Asahi-ku, Yokohama
	Futamatagawa	二俣川	2.0	10.5	●	●	●	Izumino Line
Downbound through service					Izumino Line for Shōnandai
	Kibōgaoka	希望ヶ丘	1.7	12.2	●	●	|		Asahi-ku
	Mitsukyō	三ツ境	1.4	13.6	●	●	|		Seya-ku, Yokohama
	Seya	瀬谷	1.9	15.5	●	●	|
	Yamato	大和	1.9	17.4	●	●	●	Enoshima Line	Yamato
	Sagami-Ōtsuka	相模大塚	1.9	19.3	●	●	|
	Sagamino	さがみ野	1.2	20.5	●	●	|		Ebina
	Kashiwadai	かしわ台	1.3	21.8	●	●	|
	Ebina	海老名	2.8	24.6	●	●	●	Odawara Line      Sagami Line

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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).^[6] 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.^[6]

The line became the Sagami Railway Jinchu Line (相模鉄道神中線) from 1 April 1943.^[6] 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.^[6]

Work to double-track the line commenced in January 1957 between Yokohama and Nishi-Yokohama. The entire line was double-tracked by March 1974.^[6]

The first air-conditioned trains (4-car 6000 series EMUs) were introduced on the line on 3 July 1971.^[6]

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

Station ticket barriers were modified to allow use of the Passnet magnetic farecard from 1 October 2000.^[6]

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.^{[citation needed]}

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.^[7] The underground track section and new station building is expected to be completed in 2034.^[7]

On a side note, what is known today as the Sagami Line had been constructed and owned by Sōtetsu, until 1944 when 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 today it is run by JR East.