Den-en-toshi Line
Template:Short descriptionTemplate:Use dmy datesTemplate:More citations needed
The Template:Nihongo is a major commuter line operated by the private railway operator Tokyu Corporation and connecting south-western suburbs of Tokyo and neighboring Kanagawa Prefecture, with its western terminus of Template:STN, to a major railway junction of western downtown Tokyo, Template:STN. At Shibuya, nearly all the trains continue on the Tokyo Metro Hanzomon Line. With a route length of Template:Convert, it is the longest railway line operated by Tokyu Corporation.
The line's color on maps and station guides is green, and stations carry the prefix "DT" followed by a number.<ref name="TokyuInfo">{{#invoke:citation/CS1|citation |CitationClass=web }}</ref>
History
Prewar predecessors
On 6 March 1907, the Template:Nihongo opened the first section of an interurban line between Shibuya and what is now Template:STN, using Template:RailGauge gauge.<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref> The line was called the Template:Nihongo and is not to be confused with today's Tokyu Tamagawa Line (東急多摩川線). The branch from Sangen-Jaya Station opened on 18 January 1925.
Tama Den-En-Toshi Plan
In 1953, Tokyu Group president Keita Gotō unveiled a "new town" planning scheme called the South-Western Area Development Plan. He envisioned new railway line and freeway and large, clean houses for commuters working in Tokyo.<ref name="TokyuHistory">{{#invoke:citation/CS1|citation |CitationClass=web }}</ref> The railway line would become the Tama Den-En-Toshi Line and the expressway the Tōmei Expressway. The parts of the new line completely overlaps the Tamagawa Line and the project is known as the Shin-Tamagawa Line or "New Tamagawa Line" which runs in an underground alignment under the old interurban line. The Tamagawa Line was closed in 1969 in anticipation for the opening of the Shin-Tamagawa Line, with the remaining branch line of the Tamagawa Electric Railway split off into the present Tokyu Setagaya Line. The underground Shin-Tamagawa Line opened a few years later in 1977, completely replacing the closed interurban line. Upon opening it was treated as a separate line from the Ōimachi Line connecting to said line at Futako-Tamagawa.Template:Citation needed
Development of the line
In 2000, Tama Den-En-Toshi Line as depicted today was created by merging the Shin-Tamagawa Line and the section of the Ōimachi Line west of Template:STN.Template:Citation needed Trains through servicing into the Tokyo Metro Hanzōmon Line was extended beyond Template:STN into Isesaki Line and Nikkō Line of Tobu Railway on 19 March 2003.<ref name="TokyuHistory"/>
Tokyu has expanded the line to four tracks from Futako-Tamagawa to Mizonokuchi; most trains of the Ōimachi line run through this section to Mizonokuchi, with some local trains making the intermediate stops. This service began in June 2009, postponed from fiscal 2007. Ōimachi line trains, which are 5- or 7-car sets, will then run between Template:STN and Mizonokuchi. <ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref>
Accidents and incidents
On 5 October 2025, around 11:00 p.m, the rear car of an out-of-service Tokyu 5000 series (set 5101) was struck by an oncoming Shibuya-bound Tokyu 2020 series train (set 2035) as it was entering a layover track. The impact caused the out-of-service train to derail. It was hosting a trainee driver under instruction and had reportedly stopped slightly ahead of its designated position, leaving part of the train protruding onto the active track.<ref name="collision">{{#invoke:citation/CS1|citation |CitationClass=web }}</ref> The collision caused visible damages but no serious injuries were reported among the 149 passengers on board the moving train or among the crew on the stationary train.<ref name="collision" /> Following the collision, the operator disclosed that a "signal-setting error" had persisted for years since maintenance works were carried out in 2015.<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref> Following the collision, normal services on the Den-en-toshi Line were partially suspended for a few days, with nearby lines such as the Ōimachi Line and the Tokyo Metro Hanzōmon Line also experiencing service suspensions and disruptions. This was caused by the collided trains blocking the trains in train depot from exiting.<ref name=":0">{{#invoke:citation/CS1|citation |CitationClass=web }}</ref> Tokyu Railways deployed maintenance crews to remove the derailed 5000 series car and to inspect track and signal equipment near Kajigaya Station.<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref> To prevent similar accidents, Tokyu Railways inspected 33 other stations with similar track layout.<ref name=":0" />
Operation
Nearly all trains on the Den-en-toshi Line are operated through to/from the Tokyo Metro Hanzomon Line using Tokyu, Tokyo Metro, and Tobu Railway 10-car EMUs. Around half of them continue beyond Template:STN, the terminus of the Hanzomon Line, to the Tobu Skytree Line (Kita-Koshigaya Station, Kita-Kasukabe Station and Tōbu-Dōbutsu-Kōen Station), Tobu Isesaki Line (Kuki Station), and Tōbu Nikkō Line (Minami-Kurihashi Station).<ref name="TokyuTimetable">{{#invoke:citation/CS1|citation |CitationClass=web }}</ref> At rush hour, an inbound train arrives as frequently as every 2 minutes 10 seconds.
Service types
The following three types of service are operated on the line.<ref name="TokyuTimetable"/>
- Template:Colorbox Template:Nihongo (L)
- Stops at all stations. Eight services per hour in each direction during the daytime. Two of eight are not through service to the Hanzōmon Line.
- Template:Colorbox Template:Nihongo (SE)
- In the morning rush hour, all limited-stop services are semi-express.
- In the daytime, two services are operated per hour in each direction and connect to a local train at Shibuya (outbound only), Saginuma and Nagatsuta (inbound only).
- Template:Colorbox Template:Nihongo (Ex)
- Not operated in morning rush hour. In the daytime, six services are operated per hour in each direction and two of six is through to the Ōimachi Line. Most express connect to a local train at Sangen-jaya (inbound only), Futako-tamagawa (outbound and through service to the Ōimachi Line), Saginuma and Nagatsuta.
Through trains to Ōimachi Line
On weekends, two seven-car express trains per days are operated to/from Template:STN and Template:STN. Also, a few trains are operated through to/from the Tōkyū Ōimachi Line to utilize forwarding operations to/from Saginuma depot, up to Ōimachi in the mornings, and down to Template:STN in the late evenings. These formations are 7-car sets, unlike the 10-car trains normally used on the line. A few express trains during the holidays also serve from Template:STN in the mornings, down in the evenings.Template:Citation needed
Stations
Footnotes
Rolling stock
Current
- Tokyu 2020 series<ref name="mynavi20170317">{{#invoke:citation/CS1|citation
|CitationClass=web }}</ref>
- Tokyu 5000 series
- Tokyo Metro 8000 series
- Tokyo Metro 08 series
- Tokyo Metro 18000 series
- Tobu 50000 series
- Tobu 50050 series
-
Tokyu 2020 series
-
Tokyu 5000 series
-
Tokyo Metro 8000 series
-
Tokyo Metro 08 series
-
Tokyo Metro 18000 series
-
Tobu 50050 series
Former
- Tobu 30000 series
- Tokyu 2000 series
- Tokyu 8500 series (1975–2023)<ref>{{#invoke:citation/CS1|citation
|CitationClass=web }}</ref>
-
Tobu 30000 series
-
Tokyu 2000 series
-
Tokyu 8500 series
-
Tokyu 8590 series
