Nakai Station

For the former railway station in Ishikawa Prefecture, see Nakai Station (Ishikawa).
Nakai Station

Seibu station entrance, August 2008
Location Shinjuku, Tokyo, Tokyo
Operated by
  • Bus stop
Other information
Station code SS04 (Seibu)
E-32 (Toei)
Opened 1927
Passengers 28,264 (Seibu, FY2013), 11,086 (Toei, FY2012 [boarding only]) daily

Nakai Station (中井駅 Nakai-eki) is the name of two railway stations in Shinjuku, Tokyo, Japan, served by the Seibu Shinjuku Line (station number SS04) and the Toei Ōedo Line (station number E-32) respectively. The two stations are separated by approximately two minutes' walk through a shopping street.


Nakai Station is served by the following two lines.

Station layout


The Seibu station has two side platforms serving two tracks.[1] The station has a third central track used for passing express trains in both directions.[2] Due to ongoing bridge construction on Yamate-dori, which runs above and perpendicular to the station, the only passenger gate is located by the inbound platform; access to the outbound platform is limited to an elevated bridge crossing the tracks.

1  Seibu Shinjuku Line for Kodaira, Tokorozawa, and Hon-Kawagoe
2  Seibu Shinjuku Line for Takadanobaba and Seibu-shinjuku


The Toei station has an island platform with two tracks, located underground parallel to and below both Yamate-dori and the Central Circular Route.

1  Toei Oedo Line for Tochōmae, Roppongi, and Daimon
2  Toei Oedo Line for Nerima and Hikarigaoka

Adjacent stations

Seibu Shinjuku Line
Koedo limited express: Does not stop at this station
Commuter express: Does not stop at this station
Express: Does not stop at this station
Semi express: Does not stop at this station
Shimo-Ochiai   Local   Araiyakushi-mae
Toei Oedo Line
Higashi-nakano - Ochiai-minami-nagasaki


The Seibu station opened on 16 April 1927.[3] The Toei station opened in 1997.

Station numbering was introduced on all Seibu Railway lines during fiscal 2012, with Nakai Station becoming "SS04".[4] The station number for the Ōedo Line is E-32.[5]

Passenger statistics

In fiscal 2013, the station was the 35th busiest on the Seibu network with an average of 28,264 passengers daily.[6] In fiscal 2012, an average of 11,086 people used the Toei station to board a train per day.[7]

The passenger figures for the Seibu station in previous years are as shown below.

Fiscal year Daily average
2009 28,807[8]
2010 28,532[8]
2011 27,662[9]
2012 28,011[6]
2013 28,264[6]


  1. Nakai Station information (Seibu Railway) (Japanese)
  2. Kawashima, Ryozo (March 2011). 日本の鉄道 中部ライン 全線・全駅・全配線 第12巻 東京都心北部 [Railways of Japan - Chubu Line - Lines/Stations/Track plans - Vol 12 Northern Central Tokyo]. Japan: Kodansha. p. 35/59. ISBN 978-4-06-270072-6.
  3. Terada, Hirokazu (July 2002). データブック日本の私鉄 [Databook: Japan's Private Railways]. Japan: Neko Publishing. p. 202. ISBN 4-87366-874-3.
  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 2 April 2013.
  5. 各駅情報(中井) [Information of each station (Nakai)] (in Japanese). Japan: Tokyo Metropolitan Bureau of Transportation. Retrieved 16 July 2014.
  6. 1 2 3 駅別乗降人員 2013(平成25)年度 1日平均 [Average daily station usage figures (fiscal 2013)] (PDF) (in Japanese). Japan: Seibu Railway. Retrieved 16 July 2014.
  7. 地下鉄関連情報 [Information in relation to the subway] (in Japanese). Tokyo Metropolitan Bureau of Transportation. Retrieved 16 July 2014.
  8. 1 2 駅別乗降人員 2010(平成22)年度 1日平均 [Average daily station usage figures (fiscal 2010)] (PDF) (in Japanese). Japan: Seibu Railway. Retrieved 26 January 2013.
  9. 駅別乗降人員 2011(平成23)年度 1日平均 [Average daily station usage figures (fiscal 2011)] (PDF) (in Japanese). Japan: Seibu Railway. Retrieved 26 January 2013.
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Coordinates: 35°42′53″N 139°41′12″E / 35.7146°N 139.6867°E / 35.7146; 139.6867

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