Ikawa Line

Ikawa Line
A train on the Ikawa Line
Overview
Locale	Shizuoka Prefecture
Termini	Senzu Ikawa
Stations	14
Website	https://daitetsu.jp/
Service
Type	Heavy rail
Operator(s)	Ōigawa Railway
History
Opened	1935 (1935)
Technical
Line length	25.5 km (15.8 mi) 1.5 km (0.93 mi) rack portion
Rack system	Abt
Track gauge	1,067 mm (3 ft 6 in) (Abt rack system)
Electrification	1,500 V DC overhead (rack portion only)
Route map km Ōigawa Main Line 0.0 Senzu 1.1 Kawane-Ryōgoku 2.4 Sawama Sumata River 3.9 Domoto 5.8 Kawane-Koyama Signal Tunnel No. 9 440 m Signal Tunnel No. 10 393 m 7.5 Okuizumi Ōi River Kawane Ichishiro ( closed 1990 ) former line ( closed 1990 ) 9.9 Abt Ichishiro Dai-Kajima Tunnel Ōkashima Ōigawa Bridge No. 2 Ōi River 11.4 Nagashima Dam Yosekura Tunnel Kawane-Karasawa 12.6 Hiranda Hirata Tunnel old│new Inuma Okuōi Rainbow Bridge Lake Sesso 13.9 Okuōikojō Lake Sesso tunnel 3 15.5 Sessokyō-Onsen 17.8 Omori Sekinosawa Bridge 100 m tunnel 5 20.5 Kanzō Misakubo Tunnel No. 2 264 m 23.4 Kamekubo ( closed 1971 ) tunnel 13 25.5 Ikawa Ikawa Dam 26.6 Dohira ( closed 1971 ) km Electrified rack section

The Ikawa Line (井川線, Ikawa-sen) is a railway line of the Ōigawa Railway. It runs from Senzu Station in Kawanehon, Shizuoka, the end station of the Ōigawa Main Line, and terminates at Ikawa Station in Aoi-ku, Shizuoka. The line has 61 tunnels and 51 bridges along its 25.5 kilometer length and includes the only rack-and-pinion railway section currently operating in Japan.

In September, 2022, the connecting Ōigawa Main Line suffered substantial damage from Typhoon No. 15 and rail services between Kawane-Onsen Sasamado Station and Senzu Station are suspended until further notice. Ōigawa Railway advises customers intending to travel beyond Ieyama Station towards Senzu and Sumatakyo will be required to transfer to Kawane-Honcho Town's community buses at Ieyama Station.

History

The Ikawa line began operations on March 20, 1935, as a private line for the Ōigawa Electric Company, to carry workers and materials upstream to facilitate dam construction. The single track line was originally constructed with 762 mm (2 ft 6 in) narrow gauge; however, in order to have dual usage with carriages on the Senzu-Shinrin Line (now closed) a third rail was added the following year for the Japanese standard gauge (1,067 mm (3 ft 6 in)). In 1954, the line was extended under the aegis of the Chubu Electric Power Company to facilitate the construction of the Ōigawa Dam. Railway operations were spun out of Chubu Electric into a separate company in 1959, with the foundation of the Ōigawa Railway Company. With the completion of the Nagashima Dam, a portion of the line had to be re-routed along a 1.5 km section with a maximum gradient of 9% (~1 in 11). This required the installation of an Abt rack system on October 2, 1990. An automatic train stop system was installed at the end of March 2009.

The line runs through an isolated mountain area with no cities or towns, and has a very small population density. Most of the passengers are tourists visiting one of the hot spring resorts along the line, or alpinists and hikers heading for the peaks of the Southern Alps National Park.

Former connecting lines

• Sawama station - the 762mm gauge Sen-to forest railway, consisting of a 36km 'main line', branches 6km and 4km long and a 1.4km cableway, operated between 1934 and 1968.

Stations

Name		Distance (km)	Connections	Location
Senzu	千頭	0.0	Ōigawa Railway Ōigawa Main Line	Shizuoka	Kawanehon, Haibara District
Kawane-Ryōgoku	川根両国	1.1
Sawama	沢間	2.4
Domoto	土本	3.9
Kawane-Koyama	川根小山	5.8
Okuizumi	奥泉	7.5
Abt Ichishiro	アプトいちしろ	9.9	(
Nagashima Dam	長島ダム	11.4
Hiranda	ひらんだ	12.6
Okuōikojō	奥大井湖上	13.9
Sessokyō-Onsen	接岨峡温泉	15.5
Omori	尾盛	17.8
Kanzō	閑蔵	20.5			Aoi-ku, Shizuoka
Ikawa	井川	25.5

• 
  Okuoi Rainbow Bridge
• 
  Mountainous terrain
• 
  Abt rack rail

See also

• List of railway lines in Japan

External links

• Official website (in Japanese)
• Official website (in English)