Senseki Line
Senseki Line 205-3100 series in September 2021
Overview
Native name	仙石線
Status	Operating
Owner	JR East
Locale	Miyagi Prefecture
Termini	Aoba-dōri Station Ishinomaki Station
Stations	32
Service
Type	Heavy rail
System	JR East
Operator(s)	JR East, JR Freight
Rolling stock	205 series
History
Opened	June 5, 1925; 99 years ago (1925-06-05)
Technical
Track length	50.2 km (31.2 mi)
Number of tracks	2 (Aoba-dōri — Higashi-Shiogama), 1 (Higashi-Shiogama — Ishinomaki)
Track gauge	1,067 mm (3 ft 6 in)
Electrification	1,500 V DC
Operating speed	95 km/h (59 mph)
Route map Legend Senzan Line 0.0 Aoba-dōri Sendai (1) -1952 Tōhoku Shinkansen ←Tōhoku Main Line↓ Sendai (2) 1952–2000 Sendai Tram 1926–76 0.5 Sendai (3) 2000– 1.3 Tsutsujigaoka 2.4 Miyaginohara Rikuzen-Haranomachi Depot 3.2 Rikuzen-Haranomachi Tōhoku Main Line（Miyagino Freight Line） former line -2000 4.0 Nigatake 4.6 Shinden Stop -1944 5.6 Kozurushinden 6.8 Miyagino Signal Sendai Rail Yard Miyagino branch Yard 7.7 Fukudamachi Nanakita River 8.6 Rikuzen-Takasago 10.3 Nakanosakae Sendai Rinkai Railway:Rinkai Main Line 12.6 Tagajō 14.4 Geba Shiogama Line 15.2 Nishi-Shiogama Shiogamakō 16.0 Hon-Shiogama Shiogama Line Higashi-Shiogama (1) -1981 Shiogama Uoichiba 17.2 Higashi-Shiogama(2) 1981– Tōhoku Main Line 20.3 Rikuzen-Hamada Koishihama Amusement Park 23.2 Matsushima-Kaigan Senseki-Tōhoku Line 2015– Matsushima Shin-Tomiyama Stop -1944 Matsushima Densha (1922–44) 25.5 Takagimachi 27.3 Tetaru 28.6 Rikuzen-Tomiyama 30.8 Rikuzen-Ōtsuka former line -2015 32.2 Tōna 33.4 Nobiru Naruse River 36.0 Rikuzen-Ono 37.6 Kazuma 40.2 Yamoto 41.6 Higashi-Yamoto 43.1 Rikuzen-Akai 45.2 Ishinomakiayumino 2.9# Ishinomakifutō 46.6 Hebita 49.7 Ishinomakikō Freight Terminal (2) 47.6 Rikuzen-Yamashita 52.5 Ishinomakikō Freight Terminal (1) -1971 49.0 Ishinomaki Ishinomaki Line

The Senseki Line (仙石線, Senseki-sen) is a railway line in Miyagi Prefecture, Japan, owned and operated by the East Japan Railway Company (JR East). It connects Aoba-dōri Station in Sendai to Ishinomaki Station in Ishinomaki, and provides access to the central coast areas of Miyagi Prefecture, significantly the Matsushima area. It connects with the Sendai Subway Nanboku Line at Aoba-dōri Station; the Tōhoku Shinkansen, the Tōhoku Main Line and the Senzan Line at Sendai Station; and the Ishinomaki Line in Ishinomaki. The name Senseki (仙石) comes from the combination of the first kanji of Sendai (仙台) and Ishinomaki (石巻), the two cities that the Senseki Line connects. It is also the only line in Sendai area that is powered by DC overhead power line.

• Operators, distances:
  • East Japan Railway Company (Services and tracks)
    • Aoba-dōri — Ishinomaki: 50.2 km / 31.2 mi.
  • Japan Freight Railway Company (Services and tracks)
    • Rikuzen-Yamashita — Ishinomaki-Minato: 1.8 km / 1.1 mi.
  • Japan Freight Railway Company (Services)
    • Rikuzen-Yamashita — Ishinomaki: 1.4 km / 0.9 mi.
• Stations:
  • Passenger stations: 31
  • Freight terminals: 1 (Ishinomaki-Minato)
• Tracks:
  • Double-track: Aoba-dōri — Higashi-Shiogama
  • Single-track: Higashi-Shiogama — Ishinomaki
• Electrification: Whole line (1,500 V DC)
• Railway signalling:
  • Aoba-dōri — Higashi-shiogama:ATACS(≈ETCS Level 3)
  • Higasi-Shiogama —Ishinomaki: ATS-Ps
• CTC center: Miyagino Operation Control Center

Prior to the partial suspension of services by the 2011 earthquake and tsunami, all trains originated from Aoba-dōri Station, with most running to Tagajō or Higashi-Shiogama. Local trains and rapid service trains that ran the entire length of the line operated at 30-minute intervals. When the line was fully recovered in 2015, rapid services were switched to the route via the Senseki-Tōhoku Line. Therefore, under the 2015 timetable, the section between Aoba-dōri and Takagimachi is served only by local trains.

At Sendai Station, the line crosses under the Tōhoku Main Line and its platforms, similar to the situation with the Keiyō Line in Tokyo and the Chikuhi Line in Hakata (which connects via the Fukuoka Airport Subway Line).

The segment from Aoba-dōri to Higashi-Shiogama is a crucial part of Sendai's transportation system and gets very crowded during peak periods, with headways as short as 4 minutes. During non-peak times, 3–5 trains run per hour. Between Higashi-Shiogama and Ishinomaki, two trains run per hour.

In addition to all-stations "local" trains, there are limited-stop "rapid" and "special rapid" services on the Senseki Line section between Takagimachi and Ishinomaki. Between Sendai and Takagimachi, the "rapid" and "special rapid" services operate on the Senseki-Tōhoku Line. The special rapid services make only stop at Yamoto in the Senseki Line section, while the rapid services also stop at Nobiru, Rikuzen-Ono, Rikuzen-Akai, Hebita and Rikuzen-Yamashita.

A "Mangattan Train" operates on the Senseki Line, with a livery featuring Ishinomori Manga characters.

Service was halted since the 2011 Tōhoku earthquake and tsunami, as several trains, stations, and sections of the line were destroyed, heavily damaged, or flooded. Service for the first 16 miles of the line from Sendai was expected to be restored by the end of May 2011.^[1] By mid-July, the Sendai – Matsushima-Kaigan and Yamoto – Ishinomaki sections had service restored, although the latter segment was with diesel trains due to the loss of the power substation.^[2] The remainder of the line between Matsushima-Kaigan and Yamoto was obliterated by the tsunami.^[2]

From March October 2012, services resumed on all but the Takagimachi to Rikuzen-Ono section,^[3] with services on that section restored on 30 May 2015, and a new 400m link was constructed from between Shiogama Station and Matsushima Station on the Tohoku Main Line to a point between Matsushima-Kaigan and Takagimachi Station on the Senseki Line. Costing approximately 2 billion yen to build, the new link allows through-running services from the Tohoku Main Line to the Senseki Line, and cut approximately 10 minutes off the journey time between Sendai and Ishinomaki.^[4] On 26 March 2016, a new station located between Rikuzen-Akai Station and Hebita Station, called Ishinomakiayumino Station was opened.

All stations are in Miyagi Prefecture.

The distances shown above are as of May 30, 2015 following the rerouting of the section between Rikuzen-Ōtsuka and Rikuzen-Ono, by which the section was shortened by 1.2 kilometers.^[5]

• 205-3100 series 4-car EMUs
• HB-E210 series 2-car hybrid DMUs

New HB-E210 series 2-car hybrid diesel multiple unit (DMU) trains are scheduled to be introduced on the line from 30 May 2015 between Takagimachi and Ishinomaki following the start of new Senseki-Tohoku Line services using a newly built link connecting with the Tohoku Main Line at Shiogama.^[6]

• 
  A 205-3100 series EMU
• 
  An HB-E210 series hybrid DMU

• 72 series (Since 1974)
• 79 series (Since 1974)
• 103 series (1979-2004, 2006-2009)
• 105 series (March 1987 – 1998)

• 
  A Senseki Line 103 Series Approaching Hon-Shiogama station

The Miyagi Electric Railway opened the line in sections between 1925 and 1928. Individual opening dates are given in the timeline section below. The Rikuzen-Haranomachi to Nishi-Shiogama section was double-tracked between 1968 and 1969, and extended to Higashi-Shiogama in 1981.

In 2000, the surface section between Rikuzen-Haranomachi and Sendai was replaced by a double-track underground line, with a new section to Aoba-dori to connect to the Sendai subway.

Parts of the line were extensively damaged by the 2011 Tohoku earthquake and tsunami, and whilst service was restored on the majority of the line by March 2012, the Takagimachi – Rikuzen-Ono section was returned to service on 30 May 2015.

• 5 June 1925: Miyagi Electric Railway (later Senseki Line): Sendai – Nishi-Shiogama.
• 1 January 1926: Miyaginohara Station opens.
• 14 April 1926: Nishi-Shiogama – Hon-Shiogama section opens.
• 18 April 1927: Hon-Shiogama – Matsushima-Kōen (later Matsushima-Kaigan Station) section opens.
• 10 April 1928: Matsushima-Kōen – Rikuzen-Ono section opens.
• 15 May 1928: Nigatake Station opens.
• 22 November 1928: Rikuzen-Ono – Ishinomaki section opens, connecting Sendai to Ishinomaki.
• 1 June 1929: Kazuma Station opens.
• 23 October 1931: Nobiru Station becomes Tōhoku-Suma Station.
• 1 December 1931: Tōna Station opens.
• 8 January 1932: Ishinomaki station becomes Miyaden-Ishinomaki Station.
• 1 August 1932: Geba Station opens.
• 1 February 1939: Miyaden-Yamashita Station (later Rikuzen-Yamashita Station) opens.
• 7 November 1939: Miyaden-Yamashita – Kama (later Ishinomaki Port Station) freight connection opens.
• 1 May 1944: Miyagi Electric Railway is nationalized, becomes the Senseki Line; Higashi-Nanabanchō Station becomes Sendai Higashi-Guchi Station, Hamada Station becomes Rikuzen-Hamada Station, Matsushima-Kōen becomes Matsushima-Kaigan Station, Tomiyama becomes Rikuzen-Tomiyama Station, Ōtsuka becomes Rikuzen-Ōtsuka Station, Tōhoku-Suma becomes Nobiru Station, and Miyaden-Ishinomaki becomes Ishinomaki Station.
• 1 June 1952: Sendai – Sendai Higashi-Guchi section stops operation.
• 26 September 1952: Sendai – Sendai Higashi-Gushi section abolished.
• 1957: Rapid trains begin operation.
• 23 February 1968: Track doubled on Fukudamachi – Tagajō section.
• 19 March 1968: Track doubled on Rikuzen-Haranomachi – Fukudamachi section.
• 11 October 1968: Kama – Ishinomaki-Futō freight connection opens
• 26 September 1969: Track doubled on Tagajō to Nishi-Shiogama section.
• 1 April 1971: Kama – Ishinomaki-Minato freight connection abolished.
• 15 March 1972: Kama Station becomes Ishinomaki-Minato Station.
• 1974: 72 series and 79 series trains begin operation.
• 1 October 1979: 103 series trains begin operation.
• 1 April 1981: Nakanosakae Station opens.
• 1 November 1981: Nishi-Shiogama – Higashi-Shiogama section elevated, double-tracked; Hon-Shiogama Station and Higashi-Shiogama Station moved.
• 2 October 1983: New weekend schedule introduced.
• 31 March 1987: Higashi-Yamoto Station opens.
• 1 April 1987: Senseki Line becomes part of the East Japan Railway Company (JR East).
• 13 March 1988: Rapid trains renamed Umikaze; scheduling changes.
• 21 July 1990: Ishinomaki and Senseki Lines' Ishinomaki stations are merged.
• 1 November 1999: Ishinomaki-Minato – Ishinomaki-Futō; freight connection abolished.

• 11 March 2000: Sendai – Rikuzen-Haranomachi section moved underground; Aoba-dōri – Sendai section added.
• 5 November 2002: 205-3100 series trains begin operation.
• July 2004: Last remaining 103 series trains withdrawn.^[7]
• 13 March 2004: Kozurushinden Station opens.
• 16 October 2004: "Umikaze" name is discontinued; weekday and Saturday schedules are merged.
• 16 March 2005: Nishi-Shiogama Station becomes unmanned.
• November 2006: One 4-car 103 series train is brought out of storage and reinstated into service.
• 21 October 2009: JR East's last remaining 103 series train is withdrawn from service.^[7]
• 11 March 2011: Two Senseki Line trains were derailed and badly damaged by the 2011 Tōhoku earthquake and tsunami.^[8]
• 2015: Services are restored over the entire length of the line.
• 26 March 2016: Ishinomakiayumino Station opens.