The Ōito Line (大糸線, Ōito-sen) is a railway line in Japan which connects Matsumoto Station in Nagano Prefecture with Itoigawa Station in Niigata Prefecture. There are two operators on the line: East Japan Railway Company (JR East) and West Japan Railway Company (JR West). Minami-Otari is the boundary for the two companies. The section of the line operated by JR East, between Minami-Otari and Matsumoto, is electrified and trains are fairly regular along this section. The JR West section from Minami-Otari to Itoigawa, however, is not electrified and sees less use. Trains operate less frequently along this section.

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Quick Facts Overview, Native name ...

Ōito Line
A JR East E127 series EMU on the Oito Line in Hakuba, Nagano Prefecture
Overview
Native name	大糸線
Status	In operation
Owner	JR East, JR West
Locale	Nagano, Niigata Prefectures
Termini	Matsumoto Itoigawa
Stations	41
Service
Type	Heavy rail
Operator(s)	JR East, JR West
Rolling stock	E127 series EMU, 211 series EMU, E353 series EMU, KiHa 120 series DMU
History
Opened	1915
Technical
Line length	105.4 km (65.5 mi)
Number of tracks	Entire line single tracked
Character	Rural and scenic
Track gauge	1,067 mm (3 ft 6 in)
Electrification	1,500 V DC (Matsumoto - Minami-Otari) None (Minami-Otari - Itoigawa)
Operating speed	95 km/h (59 mph)
Route map Legend 0.0 Matsumoto (Shinonoi); Alpico Kōtsū (Kamikōchi) 0.7 Kita-Matsumoto 2.6 Shimauchi 3.8 Shimatakamatsu 5.2 Azusabashi 6.8 Hitoichiba 8.4 Nakagaya 10.4 Minami-Toyoshina 11.4 Toyoshina 14.2 Hakuyachō 16.2 Hotaka 18.4 Ariake 19.9 Azumi-Oiwake 22.8 Hosono 23.8 Kita-Hosono 26.0 Shinano-Matsukawa 28.6 Azumi-Kutsukake 30.9 Shinano-Tokiwa 34.0 Minami-Ōmachi 35.1 Shinano-Ōmachi 37.2 Kita-Ōmachi 39.4 Shinano-Kizaki 41.6 Inao 42.9 Uminokuchi 46.3 Yanaba 47.9 Yanabaskijōmae (defunct) 52.8 Minami-Kamishiro 55.2 Kamishiro 56.7 Iimori 59.7 Hakuba 61.6 Shinano-Moriue 65.4 Hakuba-Ōike 68.7 Chikuni 70.1 Minami-Otari JR East JR West 74.1 Nakatsuchi 78.5 Kita-Otari 85.0 Hiraiwa 91.8 Kotaki 95.4 Nechi 100.3 Kubiki-Ōno 102.2 Himekawa 105.4 Itoigawa This diagram: view talk edit

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• Operators, services:
  • East Japan Railway Company (Services and tracks)
    • Matsumoto — Minami-Otari: 70.1 km
  • West Japan Railway Company (Services and tracks)
    • Minami-Otari — Itoigawa: 35.3 km
• Stations:
  • JR East: 34
  • JR West: 8 including Itoigawa, excluding Minami-Otari
• Double-tracked section: None
• Electrification: Matsumoto — Minami-Otari (1,500 V DC)
  Minami-Otari — Itoigawa (None)
• Railway signalling:
  • Matsumoto — Itoigawa: Automatic Train Stop, S-type

The section between Matsumoto and Shinano-Ōmachi was built between 1915 and 1916 by the Shinano Railway (信濃鉄道, Shinano Tetsudō), which electrified the line in 1926. The company was nationalised in 1937 and was not the same entity as the present Shinano Railway.^{[citation needed]}

The rest of the line was built by the Japanese Government Railways (JGR) and the Japanese National Railways (JNR) between 1929 and 1957. The Shinano-Ōmachi to Minami Otari section was electrified between 1959 and 1967. CTC signalling was commissioned in 1983, and freight services ceased in 1987.^{[citation needed]}

Following privatization of JNR on 1 April 1987, the line was divided and assigned to JR East and JR West.

Station numbering was introduced on the line by JR East from 12 December 2016, with stations numbered in sequence from 9 (Minami-Otari) to 42 (Matsumoto).^[2]

• List of railway lines in Japan