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{{More citations needed|date=September 2014}}
{{Infobox rail line
 | name        = Seibu Tamagawa Line
 | native_name = 西武多摩川線
 | native_name_lang = ja
 | color       = FFA500 <!-- Orange -->
 | logo        =
 | logo_width  =
 | image       = Series New101 259F in Kyoteijyo-mae 20101117.jpg
 | image_width = 300px
 | caption     = A Seibu Tamagawa Line train
 | type        = [[Commuter rail]]
 | system      =
 | status      =
 | locale      = [[Tokyo]]
 | start       = {{STN|Musashi-Sakai}}
 | end         = {{STN|Koremasa}}
 | stations    = 6
 | routes      =
 | daily_ridership   =
 | open        = 22 October 1917
 | close       =
 | owner       = [[Seibu Railway]]
 | operator    =
 | character   =
 | depot       = 
 | stock       =
 | linelength  = {{Convert|8.0|km|mi|abbr=on}}
 | tracklength = 
 | minradius   = 300 m
 | tracks     = 1
 | gauge       = {{RailGauge|1067mm}}
 | electrification          = 1,500 V DC, overhead catenary
 | speed       = {{Convert|95|km/h|mph|round=5|abbr=on}}
 | elevation   =
 | map         =
 | map_state   = 
}}
The {{nihongo|'''Seibu Tamagawa Line'''|西武多摩川線|Seibu Tamagawa-sen}} is an 8.0&nbsp;km 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 directly connected to any other part of the Seibu Railway system  (rather, only indirectly via a rarely used maintenance interconnection via the Chūō Main Line near Musashi-Sakai). The line is single-track: trains traveling in opposite directions pass each other as necessary at the stations, which are double-tracked.

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.

==Stations==
[[File:Musashi-Sakai Station-2008.02.02 2.jpg|thumb|At Musashi-Sakai Station]]
{|class=wikitable
|-
!No.
!Station
!Japanese
!Distance (km)
!Transfers
! 
!Location
!Prefecture
|-
| {{SBSN|SW|01}}
| [[Musashi-Sakai Station|Musashi-Sakai]]
| 武蔵境
| style="text-align:center;"|0.0
| {{JRLS|JC|fontsize=13}} [[Chūō Line (Rapid)]] {{JRSN|JC|13|size=30}}
| style="text-align:center;"|∨
| [[Musashino, Tokyo|Musashino]]
| rowspan="6"|[[Tokyo prefecture|Tokyo]]
|-
| {{SBSN|SW|02}}
| [[Shin-Koganei Station|Shin-Koganei]]
| 新小金井
| style="text-align:center;"|1.9
| rowspan="2"| 
| style="text-align:center;"|◇
| [[Koganei, Tokyo|Koganei]]
|-
| {{SBSN|SW|03}}
| [[Tama Station|Tama]]<br />(Tokyo University of Foreign Studies)
| 多磨<br/>(東京外国語大学)
| style="text-align:center;"|4.1
| style="text-align:center;"|｜
| rowspan="4"|[[Fuchū, Tokyo|Fuchū]]
|-
| {{SBSN|SW|04}}
| [[Shiraitodai Station|Shiraitodai]]
| 白糸台
| style="text-align:center;"|5.5
| [[File:Number prefix Keiō.PNG|15px]] [[Keio Line]] ([[Musashinodai Station|Musashinodai]] [[File:KO-21 station number.png|25px]], [[Tama-reien Station|Tama-reien]] [[File:KO-22 station number.png|25px]])
| style="text-align:center;"|◇
|-
| {{SBSN|SW|05}}
| [[Kyōteijō-mae Station|Kyōteijō-mae]]
| 競艇場前
| style="text-align:center;"| 7.0
| rowspan="2"| 
| style="text-align:center;"|｜
|-
| {{SBSN|SW|06}}
| [[Koremasa Station|Koremasa]]
| 是政
| 8.0
| style="text-align:center;"|｜
|}

==Rolling Stock==

As of March 2010, the line's services are operated exclusively by a fleet of 16 New 101 Series. These trains are wrapped with different liveries on various occasions. However, the New 101 Series trains typically operate a white livery. 

===Liveries===

Izu Hakone Color

To commemorate the 100th anniversary of the opening of the Tamagawa Line from 2017 to 2018, which coincided with the 100th anniversary of the Izu Hakone Railway, the two lines celebrated by adopting each other's liveries.

Akaden painting

By request from a questionnaire at the 100th-anniversary event of the Tamagawa Line, from January 24, 2018, Seibu Railway's old livery "Akaden Paint" (red x beige) was used.

Two-tone color 

From April 18, 2018, the trains were reprinted with the two-tone color of yellow x beige. The paint color is derived from the livery that was used during the time of the debut of the New 101 series train. The livery was also used before the fleet renewal of 2010, as the Old 101 Series train was featured in the same livery. This livery was the most requested after Akaden painting in the questionnaire at the 100th-anniversary event of Tamagawa Line. 

Omi Railway Color (1251 formation)

From July 11, 2018, To commemorate the 120th anniversary of the Ohmi Railway and the 100th anniversary of the Tamagawa line a wrapping featuring the "Mizuumifugo" (light blue) livery was introduced.

===Former Rolling Stock===

Before the New 101 series, the line's services were operated by the Old 101 series, which were in use from 1996 to 2010. These trains originally were introduced as "One-Man" (ワンマン) services. Prior to the One-Man train service on the New 101 Series The following trains were also used: The 401 series, 701 series, which had been transferred from the Shinjuku line system to the Tamagawa line, and the 451 series, 551 series, and the 571 series, which were called Akaden trains due to their red and beige livery. 

==History==
The first section of the line, between Musashi-Sakai and Kita-Tama Station (present-day Shiraitodai Station), opened on 22 October 1917.<ref name="terada2013">{{cite book |last = Terada |first = Hirokazu |title = データブック日本の私鉄 |trans-title=Databook: Japan's Private Railways |publisher = Neko Publishing |date = 19 January 2013 |location = Japan |page =227 |isbn = 978-4-7770-1336-4}}</ref> The line was extended to Koremasa on 20 June 1922.<ref name="terada2013"/> In 1927, the company was absorbed by the [[Seibu Railway]].{{citation needed|date=September 2014}} The entire line was electrified in 1950. Freight operations ceased in 1967.{{citation needed|date=September 2014}}



==References==
This article incorporates material from the corresponding article in the Japanese Wikipedia.
{{Reflist}}

==External links==
*[https://www.seiburailway.jp/railway/station/ Seibu Railway website - 3rd tab Tamagawa Line] {{in lang|ja}}
*[https://web.archive.org/web/20181105025003/http://www.geocities.co.jp/daichicrazy/ Seibu-Tamagawa Line Guide 2018 archive]: information on stations and their neighbours, tickets, and transfers in both English and Japanese

{{seibu transit}}
{{Tokyo transit}}

{{coord|35.68212|N|139.51950|E|source:placeopedia|display=title}}

[[Category:Seibu Tamagawa Line| ]]
[[Category:Railway lines in Tokyo]]
[[Category:Lines of Seibu Railway|Tamagawa Line]]
[[Category:1067 mm gauge railways in Japan]]
[[Category:Railway lines opened in 1917]]