Seibu Shinjuku Line

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     Seibu Shinjuku Line
10000 Kokukoen 20070722.JPG
Seibu Shinjuku Line 10000 series EMU on a Koedo limited express service, July 2007
Type Commuter rail
Locale Kanto region
Termini Seibu Shinjuku
Stations 29
Daily ridership 945,302 (FY2010)[1]
Opening 1894
Owner Seibu Railway
Depot(s) Minami-Iriso
Line length 47.5 km (29.5 mi)
Track gauge 1,067 mm (3 ft 6 in)
Electrification 1,500 V DC, overhead catenary

The Seibu Shinjuku Line (西武新宿線 Seibu-Shinjuku-sen?) is a Japanese railway line owned by the private railway operator Seibu Railway, running from Seibu Shinjuku Station in Shinjuku, Tokyo to Hon-Kawagoe Station in Kawagoe, Saitama.

The Shinjuku Line is one of two main lines of the Seibu Railway system along with the Ikebukuro Line. The two main lines cross at Tokorozawa Station in Tokorozawa, Saitama. The line serves the western suburbs of Tokyo, connecting them to Shinjuku and other areas of downtown Tokyo.


The line is mostly double-track, except for 1.1 km of single track between the Wakita Signal and Hon-Kawagoe Station. While the section from Seibu-Shinjuku to Takadanobaba is elevated, the line runs at ground level through a suburban area until Saginomiya. This portion of the line has numerous curves and level crossings and is therefore subject to speed restrictions; further west, there are more tunnels and overpasses.


Five types of train service are operated on the line: Local, Semi Express, Express, Commuter Express, and Koedo limited express, as shown below. Limited Express trains use Seibu 10000 series EMUs, and a supplementary limited express ticket is required.

There are regular through operations to the Haijima Line and the Kokubunji Line. There are also occasional through services to Seibu-Kyūjō-mae Station in order to bring fans to the Seibu Dome for Saitama Seibu Lions baseball games. The Seibu Shinjuku Line is one of the few major commuter rail lines in Tokyo that does not have through service to the Tokyo Metro or Toei Subway network.


O: stop
|: pass
     L: Local (各停 Kakutei?) stop at all stations, not shown
     SE: Semi Express (準急 Junkyū?)
     E: Express (急行 Kyūkō?)
     CE: Commuter Express (通勤急行 Tsūkin Kyūkō?)
     LE: Koedo Limited Express (特急 "小江戸"?)[2]
No. Station Japanese Distance
SE E CE LE Transfers Location
SS01 Seibu-Shinjuku 西武新宿 0.0 O O O O Yamanote Line (Shinjuku Station) Shinjuku Tokyo
SS02 Takadanobaba 高田馬場 2.0 O O O O Yamanote Line
Subway TokyoTozai.png Tokyo Metro Tōzai Line (T-03)
SS03 Shimo-Ochiai 下落合 3.2 | | | |  
SS04 Nakai 中井 3.9 | | | |
SS05 Araiyakushimae 新井薬師前 5.2 | | | | Nakano
SS06 Numabukuro 沼袋 6.1 | | | |
SS07 Nogata 野方 7.1 | | | |
SS08 Toritsukasei 都立家政 8.0 | | | |
SS09 Saginomiya 鷺ノ宮 8.5 O O O |
SS10 Shimo-Igusa 下井草 9.8 | | | | Suginami
SS11 Iogi 井荻 10.7 | | | |
SS12 Kami-Igusa 上井草 11.7 | | | |
SS13 Kami-Shakujii 上石神井 12.8 O O O | Nerima
SS14 Musashiseki 武蔵関 14.1 O | | |
SS15 Higashi-Fushimi 東伏見 15.3 O | | | Nishitōkyō
SS16 Seibu-Yagisawa 西武柳沢 16.3 O | | |
SS17 Tanashi 田無 17.6 O O O |
SS18 Hanakoganei 花小金井 19.9 O O | | Kodaira
SS19 Kodaira 小平 22.6 O O | | Seibu Haijima Line
SS20 Kumegawa 久米川 24.6 O O | |   Higashimurayama
SS21 Higashi-Murayama 東村山 26.0 O O O O Seibu Kokubunji Line
Seibu Seibuen Line
SS22 Tokorozawa 所沢 28.9 O O O O Seibu Ikebukuro Line Tokorozawa Saitama
SS23 Kōkū-kōen 航空公園 30.5 O O | |  
SS24 Shin-Tokorozawa 新所沢 31.7 O O O |
SS25 Iriso 入曽 35.6 O O | | Sayama
SS26 Sayamashi 狭山市 38.6 O O O O
SS27 Shin-Sayama 新狭山 41.3 O O | |
SS28 Minami-Ōtsuka 南大塚 43.9 O O | | Kawagoe
SS29 Hon-Kawagoe 本川越 47.5 O O O O Tobu Tojo Line (Kawagoeshi Station)


The oldest section of the Shinjuku Line is between Higashi-Murayama Station and Hon-Kawagoe Station. This section was built by the Kawagoe Railway (川越鉄道 Kawagoe Tetsudō?) to serve as a freight feeder for the Kōbu Railway (甲武鉄道 Kōbu Tetsudō?) between Shinjuku and Tachikawa (now known as the Chūō Main Line). The initial Kawagoe Railway route opened between Kokubunji and Kumegawa in 1894; this portion is now known as the Seibu Kokubunji Line. Its northward extension to Kawagoe, the first part of what is now the Seibu Shinjuku Line, opened in 1895. Following several mergers and name changes between 1920 and 1922, the Kawagoe Railway became part of the Seibu Railway.

In 1927, Seibu Railway built its new Murayama Line between Takadanobaba Station on the Yamanote Line in Tokyo and Higashi-Murayama Station to compete with Musashino Railway (武蔵野鉄道 Musashino Tetsudō?) (present-day Seibu Ikebukuro Line) and the state-owned Chūō Main Line with the route being in the middle of the two.

In 1952, an extension from Takadanobaba to Seibu-Shinjuku Station was completed. At this time the line was renamed the Shinjuku Line, integrating the Murayama Line and the northern section of the Kawagoe Line. The new Seibu-Shinjuku terminal was built as a temporary station, as Seibu planned to extend the line to the second floor of what is now known as Lumine Est on the east side of Shinjuku Station. This plan was later scrapped due to insufficient space to handle trains longer than six cars. Seibu-Shinjuku Station was expanded to include a high-rise hotel in 1977.

In the 1980s, Seibu drew up a plan to build an underground line for express trains between Seibu-Shinjuku and Kami-Shakujii, including a new underground station between Seibu-Shinjuku and the Metro Promenade. This plan was eventually abandoned due to costs and a decline in passenger ridership versus previous projections. Seibu was also a bidder to acquire the former JR freight terminal site in 1989, where they planned to build a new underground terminal; Takashimaya won the bid and constructed the Takashimaya Times Square complex on the site.

From the start of the revised timetable on 30 June 2012, the limited-stop Rapid Express (快速急行 kaisoku-kyūkō?) services were abolished.[3]

Station numbering was introduced on all Seibu Railway lines during fiscal 2012, with Seibu Shinjuku Line stations numbered prefixed with the letters "SS".[4]


  1. ^ Seibu ridership in 2010 Train Media (sourced from Seibu) Retrieved May 28, 2012.
  2. ^ "西武新宿線停車駅あんない". Seibu Railway. Retrieved August 5, 2013. 
  3. ^ "西武鉄道6月30日ダイヤ改正 新宿線系快速急行・拝島快速は廃止" [Seibu 30 June Timetable Revision: Shinjuku Line Rapid Express and Haijima Rapid to be Abolished]. Tetsudo Hobidas (in Japanese). Japan: Neko Publishing. 21 May 2012. Retrieved 13 July 2012. 
  4. ^ "西武線全駅で駅ナンバリングを導入します" [Station numbering to be introduced at all Seibu stations] (PDF). News Release (in Japanese). Japan: Seibu Railway. 23 February 2012. Retrieved 27 March 2013. 

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