Seibu Tamagawa Line
| Seibu Tamagawa Line | |
|---|---|
A Seibu Tamagawa Line train | |
| Overview | |
| Native name | 西武多摩川線 |
| Owner | Seibu Railway |
| Line number | SW |
| Locale | Tokyo |
| Termini | |
| Stations | 6 |
| Service | |
| Type | Commuter rail |
| Rolling stock | New 101 series |
| History | |
| Opened | 22 October 1917 |
| Technical | |
| Line length | 8.0 km (5.0 mi) |
| Number of tracks | 1 |
| Track gauge | 1,067 mm (3 ft 6 in) |
| Minimum radius | 300 m |
| Electrification | 1,500 V DC, overhead catenary |
| Operating speed | 95 km/h (60 mph) |
The Seibu Tamagawa Line (西武多摩川線, Seibu Tamagawa-sen) is an 8.0 km (5.0 mi) railway line in the western suburbs of Tokyo operated by the private railway operator Seibu Railway. The line connects Musashi-Sakai Station on the Chūō Main Line with Koremasa Station along the Tama River. The line has only six stations and is not connected to any other part of the Seibu Railway system. The only connection to any other rail line is a rarely used maintenance connection to the JR East Chūō Main Line (just west of Musashi-Sakai Station) that is used to transfer trains requiring inspection or major repairs to Seibu's Musashigaoka Vehicle Inspection and Repair Shop.
The Seibu Tamagawa Line is single-track: trains traveling in opposite directions pass each other as necessary at the stations, which are double-track. As of January 2025, during 12-minute frequency trains pass at Shin-Koganei and Shiraitodai, and during 20-minute frequency trains pass at Shiraitodai only.
Although the line is short, it provides access to the Tokyo University of Foreign Studies, the Tokyo Racecourse, the Ajinomoto Stadium, the Tokyo Metropolitan Police Department police school, many cemeteries (including Tokyo's largest, Tama Cemetery), the American School in Japan, and the Tama River.