Services
All trains which are bound for Yamagata Station run through to Yamagata Station via Ou Main Line between Uzen-Chitose and Yamagata Stations. As of the March 2018 timetable revision, all trains on the Senzan Line operate in 4-car or 6-car formations.
Rapid
Some Senzan Line trains run as rapid trains. All trains stop at the following stations:
- All stations until Ayashi (Tōshōgu, Kita-Sendai, Kitayama, Tōhoku-Fukushidaimae, Kunimi, Kuzuoka, Rikuzen-Ochiai and Ayashi)
- Sakunami
- Yamadera
- Uzen-Chitose
- Kita-Yamagata
- Yamagata
At one point, there was a G-Rapid that stopped at the most stations out of all rapid trains, but was considered too confusing by passengers and soon put out of service. Instead, the number of Local Trains were increased. Until 2004, there were only three types of rapids (A, B, C). Also, until September 30, 2003, there was a Special Rapid "Holiday Senzan" that used to run on Saturdays and weekends.
With the opening of the Sendai Airport Line (established in 2006), the Senzan Line was expected to have Sendai Airport-bound trains. But they have not connected with the direct train at this time.
In the 18 March 2023 timetable change, all of the previous Rapid services were abolished and only one type of rapid train runs now. Before the change, the previous types were: Rapid A, B, C, D, E and F.
Local
There are three types of local train service: Sendai — Yamagata, Sendai — Sakunami and Sendai — Ayashi.
Sendai ー Sakunami local trains run only in the morning, two Sendai-bound trains and one Sakunami-bound train.
Sendai — Ayashi
Since this part of the line is located in the central suburban area of Sendai, there are many commuters, and there are typically 2-4 Sendai — Ayashi trains every hour. Although there were fewer trains going from Ayashi to Sendai, the numbers have increased in recent years. The section is double-track and the interchange stations are Kita-Sendai, Kunimi, and Rikuzen-Ochiai. Presently, parts of the track are being elevated and there are plans to build a new station near the Shin-Ishinomaki Highway railroad crossing.
Ayashi — Yamagata
Before the abolition of the Saturday/weekend schedule, there was one Saturday/weekend return train from Sakunami that stopped at Nishi-Sendai Hi-Land, however, there have been no stops at Nishi-Sendai Hi-Land Station since 2004.
Local trains are scheduled around the rapid train schedules. However, trips to the Sakunami Hot Springs as well as the Yamadera temple well known from Matsuo Bashō's Oku no Hosomichi are popular. Also, during the ski-season, the only way to get to places such as Omoshiroyama is the train and there are a great number of passengers during the tourist season. However, to prevent delays caused by heavy snow, some early morning and late-night local trains pass through Oku-Nikkawa and Omoshiroyama-Kōgen stations without stopping during the winter months, a practice that began in January 2022.
There are two temporary stations, but as there have been no stops at Nishi-Sendai Hi-Land and Yatsumori since October 2004 and June 2003, respectively. These two stations are abolished on March 14, 2014.
Tōhoku Main Line
There are only two trains that share both the Senzan and Tōhoku Main Lines' tracks: Senzan Line 2832M, which runs from Sakunami Station to Sendai where it becomes 1428M and continues on the Tōhoku Main Line tracks until Iwanuma, and Tōhoku Main Line 425M, which originates in Shiroishi, changes to 1831M at Sendai, and continues on the Senzan Line tracks to Ayashi. The Sakunami — Iwanuma train runs only on Saturdays and weekends.
There used to be many more trains that utilized the Tōhoku Main Line's tracks, but the numbers have decreased in recent years. Past trains went to such places as Fukushima, Matsushima, and Kogota. After 2001, the numbers began going down until they reached two trains, which is the number. It was expected that that number would increase in 2006, though, when the Sendai Airport Line opens.
And now, no train runs through to Tohoku Main Line or Sendai Airport Access Line.
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