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Seibu Shinjuku Line
Seibu 10000 series EMU running on the Seibu Shinjuku Line in July 2022
Overview
Native name	西武新宿線
Owner	Seibu Railway
Locale	Kanto region
Termini	Seibu Shinjuku Hon-Kawagoe
Stations	29
Service
Type	Commuter rail
Depot(s)	Minami-Iriso
Daily ridership	945,302 (FY2010)[1]
History
Opened	1894
Technical
Line length	47.5 km (29.5 mi)
Track gauge	1,067 mm (3 ft 6 in)
Electrification	1,500 V DC, overhead catenary
Operating speed	105 km/h (65 mph)
Route map Legend km 0.0 Seibu-ShinjukuM Saikyo &Shōnan-Shinjuku lines Yamanote Line toŌsaki 2.0 TakadanobabaT Saikyo &Shōnan-Shinjuku lines Yamanote Line toIkebukuro 3.2 Shimo-Ochiai 3.9 NakaiE 3.9 Toei Ōedo Line 5.2 Araiyakushi-mae 6.1 Numabukuro 7.1 Nogata 8.0 Toritsu-Kasei 8.5 Saginomiya 9.8 Shimo-Igusa 10.7 Iogi 11.7 Kami-Igusa Kami-Shakujii Depot 12.8 Kami-Shakujii 14.1 Musashi-Seki 15.3 Higashi-Fushimi 16.3 Seibu-Yagisawa 17.6 Tanashi 19.9 Hana-Koganei 22.6 Kodaira Seibu Haijima Line Haijima 24.6 Kumegawa Kokubunji Seibu Kokubunji Line 26.0 Higashi-Murayama Seibu Seibuen Line Seibuen Seibu Ikebukuro Line toHannō/Seibu-Chichibu 28.9 Tokorozawa Seibu Ikebukuro Line toIkebukuro 30.5 Kōkū-kōen 31.7 Shin-Tokorozawa 33.7 Minami-Iriso Junction Minami-Iriso Depot 35.6 Iriso 38.6 Sayamashi 41.3 Shin-Sayama 43.9 Minami-Ōtsuka Ahina Freight Terminal Seibu Ahina Line 46.6 Wakita Junction Kawagoe Line ← toŌmiya│toKomagawa → Tōbu Tōjō Line ← toIkebukuro│toYorii → 47.5 Hon-Kawagoe km This diagram: view talk edit

TheSeibu Shinjuku Line (西武新宿線,Seibu-Shinjuku-sen) is a Japanese railway line owned by the private railway operatorSeibu Railway, connectingSeibu Shinjuku Station inShinjuku, Tokyo withHon-Kawagoe Station inKawagoe, Saitama.

The Shinjuku Line is one of two main lines of the Seibu Railway system along with theIkebukuro Line. The two main lines cross atTokorozawa Station inTokorozawa, 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 (1200 yards) of single track between Wakita Junction andHon-Kawagoe Station. However, whilst the above section is single tracked, many trains during the day terminate at Shin-Tokorozawa station, or earlier. While the section from Seibu-Shinjuku to Takadanobaba is elevated, the line runs at ground level through a suburban area until Saginomiya.

Seven types of train service are operated on the line: Local, Semi Express, Express, Commuter Express, Rapid Express, Haijima Liner, andKoedo limited express, as shown below. Limited Express trains useSeibu 10000 series EMUs, and a supplementary limited express ticket is required. In addition, operation of the all-seat reserved train "Haijima Liner" using theSeibu 40000 series EMU started from March of 2018. The "Haijima Liner" operates from Seibu-Shinjuku to Haijima on weekends and in both directions on weekdays.^[2]

There are regular through operations to theHaijima Line. There are also occasional through services toSeibukyūjō-mae Station in order to bring fans to theSeibu Dome forSaitama 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 theTokyo Metro orToei Subway network.

Through service onto theSeibu Kokubunji Line has been suspended since 19 March 2019 because of the reconstruction of Higashi-Murayama Station into an elevated station.^[3]

O: stop

|: pass

▽:For trains heading to Seibu-Shinjuku: Alighting passengers only / For trains heading to Haijima: Boarding passengers only

▲:For trains heading to Seibu-Shinjuku: Alighting passengers only / For trains heading to Haijima: Both alighting and boarding passengers

  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)

  RE: Rapid Express (快速急行,Kaisoku Kyūkō)

  HL: Haijima Liner (拝島ライナー,Haijima Rainā)

  LE: Limited ExpressKoedo-go (特急「小江戸号」,Tokkyū Koedo-gō)

^[4]

No.	Station	Japanese	Distance (km)	SE	E	CE	RE	HL	LE	Transfers	Location
SS01	Seibu-Shinjuku	西武新宿	0.0	O	O	O	O	O	O	JYYamanote Line JCChuo Rapid Line JBChuo-Sobu Line JSShonan-Shinjuku Line JASaikyo Line Keio Line,Keio New Line Odakyu Odawara Line MTokyo Metro Marunouchi Line (M-08) SToei Shinjuku Line (S-01) EToei Oedo LineShinjuku (E-27),Shinjuku-nishiguchi (E-01)	Shinjuku	Tokyo
SS02	Takadanobaba	高田馬場	2.0	O	O	O	O	▽	O	JYYamanote Line TTokyo Metro Tozai Line (T-03)
SS03	Shimo-Ochiai	下落合	3.2	|	|	↑	↓	↓	|
SS04	Nakai	中井	3.9	|	|	↑	↓	↓	|	EToei Oedo Line
SS05	Araiyakushi-mae	新井薬師前	5.2	|	|	↑	↓	↓	|		Nakano
SS06	Numabukuro	沼袋	6.1	|	|	↑	↓	↓	|
SS07	Nogata	野方	7.1	|	|	↑	↓	↓	|
SS08	Toritsu-Kasei	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	Musashi-Seki	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	O	↓	|
SS18	Hana-Koganei	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		O	Seibu Kokubunji Line Seibu Seibuen Line
SS22	Tokorozawa	所沢	28.9	O	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	O		|
SS25	Iriso	入曽	35.6	O	O	↑	O		|		Sayama
SS26	Sayamashi	狭山市	38.6	O	O	O	O		O
SS27	Shin-Sayama	新狭山	41.3	O	O	↑	O		|
SS28	Minami-Ōtsuka	南大塚	43.9	O	O	↑	O		|	Seibu Ahina Line (Freight, closed)	Kawagoe
SS29	Hon-Kawagoe	本川越	47.5	O	O	O	O		O	TJTobu Tojo Line (Kawagoeshi Station)

^[4]

• Seibu 2000 series
• Seibu 6000 series
• Seibu 20000 series
• Seibu 30000 series
• Seibu 40000 series

• 
  2000 series
• 
  New 2000 series
• 
  6000 series
• 
  20000 series
• 
  30000 series
• 
  40000 series

• Seibu 10000 series

• 
  10000 series

The oldest section of the Shinjuku Line is betweenHigashi-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) betweenShinjuku andTachikawa (now known as theChūō Main Line). The initial Kawagoe Railway route opened betweenKokubunji and Kumegawa in 1894; this portion is now known as theSeibu 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.^{[citation needed]}

In 1927, Seibu Railway built its new dual track, electrified at 1,500 V DC, Murayama Line between Takadanobaba Station on theYamanote Line in Tokyo and Higashi-Murayama Station to compete with Musashino Railway (武蔵野鉄道,Musashino Tetsudō) (present-daySeibu Ikebukuro Line) and theJapanese National Railways Chūō Main Line, the route being in the middle of the two.^{[citation needed]} The rest of the line was electrified at the same time.^{[citation needed]}

The Higashi-Murayama to Tokorozawa section was double-tracked between 1950 and 1958, with the Tokorozawa to Irimagawa section double-tracked between 1967 and 1975. The rest of the line (except for the section between the Wakita Junction and Hon-Kawagoe Station) was double-tracked between 1980 and 1991.^{[citation needed]}

In 1952, a dual-track 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 ofShinjuku 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.^[5]

From the start of the revised timetable on 30 June 2012, the Haijima rapid (拝島快速,Haijima kaisoku) and Rapid Express (快速急行,Kaisoku Kyūkō) services were abolished.^[6]

Station numbering was introduced on all Seibu Railway lines during fiscal 2012, with Seibu Shinjuku Line stations numbered prefixed with the letters "SS"(SeibuShinjuku line).^[7]

From the timetable revision on 14 March 2020, the limited-stop Rapid Express (快速急行,Kaisoku Kyūkō) was reinstated for weekend and holiday services.^[8]

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 indefinitely postponed in 1995 due to costs and a decline in passenger ridership versus previous projections.^[5] 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.^{[citation needed]} In 2019, the Tokyo Metropolitan Government officially cancelled the plan.^[9]

During the 1960s, Seibu unsuccessfully negotiated with theTeito Rapid Transit Authority to offer through service between the Seibu Shinjuku Line andTozai Line. Seibu's approach was rejected in favor of through operation with theChuo Main Line.^[5] At Takadanobaba station, the interchange between the Seibu Shinjuku Line and Tozai Line involves passing through a few levels from the elevated Seibu Shinjuku line platform to the underground Tozai line platform. The transfer is considerably crowded during the rush hour, as Takadanobaba is the busiest station on the entire Seibu Shinjuku Line. On March 9, 2015, the Nakano Ward Council released a proposal for through operations between the Seibu Shinjuku Line and Tokyo Metro Tozai Line by constructing an underground connection between the two lines to remove the transfer between the two lines.^[10] In September 2020, Seibu Railway President Kimio Kitamura said during an interview with theToyo Keizai that there have been many complaints from passengers heading to the city center on the Seibu Shinjuku Line and Seibu is considering various options to address this issue, such as getting through service into the Tokyo Metro Tozai Line.^[11]

Initial work has started on grade separating the line from Nogata to Iogi Stations^[12] and from Iogi to Seibu-Yagisawa Stations.^[13] Proposals are being done to for grade separating the line from Tanashi to Hanakoganei Stations^[14] and from Takadanobaba to Nakai Stations.^[15]

• List of railway lines in Japan

This article incorporates material from the corresponding article in the Japanese Wikipedia

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• see middle Shinjuku Line section(in Japanese)

• Seibu Shinjuku Line
• Lines of Seibu Railway
• Railway lines in Tokyo
• Rail transport in Saitama Prefecture
• 1067 mm gauge railways in Japan
• Railway lines opened in 1895
• 1895 establishments in Japan

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