The Watarase Keikoku Line (わたらせ渓谷線, Watarase Keikoku-sen) is a Japanese railway line connecting Kiryū Station in Kiryū, Gunma and Matō Station in Nikkō, Tochigi. This is the only railway line that the third-sector company Watarase Keikoku Railway (わたらせ渓谷鐵道, Watarase Keikoku Tetsudō) operates. The company and line are also known as Watakei (わた渓) or Watetsu (わ鐵). The company acquired the line from the East Japan Railway Company (JR East) in 1989. As the name suggests, the line runs along the Watarase River through a deep valley.

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Quick Facts Overview, Native name ...

Watarase Keikoku Line
Watarase Keikoku Railway Wa 89-313 train.
Overview
Native name	わたらせ渓谷線
Termini	Kiryū Matō
Stations	17
History
Opened	15 April 1911; 113 years ago (1911-04-15)
Technical
Line length	44.1 km (27.4 mi)
Number of tracks	1
Track gauge	1,067 mm (3 ft 6 in)
Operating speed	75 km/h (47 mph) (Maximum)
Train protection system	ATS-P ATS-S N

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The Ashio Railway Co. opened the line to Ashio-Motoyama (2 kilometres or 1.2 miles beyond Mato) in 1911–12^{[clarification needed]} to service the Ashio Copper Mine, and leased the line to JNR in 1913. Passenger services were introduced in 1914. In 1918 the line was nationalised.^[1]

The copper mine closed in 1973, the same year the line was deviated for the construction of the Kusaki Dam,^[1] including the 5,242-metre (17,198 ft) Kusaki Tunnel.

Operation of the line between Kiryū and Matō was transferred to the Watarase Keikoku Railway, a third-sector company, in 1989.^[2] Also in 1989, the Ashio-Motoyama – Mato section was closed.

• Distance: 44.1 km (27.4 mi)
• Gauge: 1,067 mm (3 ft 6 in)
• Stations: 17
• Double-tracking: None
• Electrification: None
• Railway signalling:
  • Kiryū — Shimo-Shinden: Automatic
  • Shimo-Shinden — Matō: Simplified Automatic

• Trains stop at stations marked "●" and pass those marked "｜".
• Local trains stop at all stations (other than Shimo-Shinden Signal Box).