西大井
Nishi-Oi Station
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Nishi Oi is a railway station in Tokyo.
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About this station
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Station History & Timeline
20 Events
1929
The Tokyu Toyoko Line and the Teito Rapid Transit Authority's Shinjuku Line were connected, establishing the Tokyu Shinjuku Line and the Ginza Line's through service, and the Tokyu Toyoko Line was renamed to the Toyoko Line, with the section from Shibuya Station to Shinjuku Station being renamed to the Shinjuku Line, however a more accurate translation is: The Tokyu Toyoko Line was connected to the Teito Rapid Transit Authority's Shinjuku Line, establishing through service, and the Tokyu Toyoko Line was renamed, with the section from Shibuya to Shinjuku being renamed the Shinjuku Line, but the most concise translation is: The Tokyu Toyoko Line was connected to the Teito Rapid Transit Authority's Shinjuku Line.
Machine translation — show Japanese original
品鶴線開設。
1969
Japanese National Railways (JNR) presented a plan to the Shinagawa Ward to electrify the Tamachi-Shinbashi section of the Tokaido Line for passenger service on the Tamatsu Line.
Machine translation — show Japanese original
日本国有鉄道（国鉄）が品川区に対して、品鶴線旅客化案を提示。
1972
Five members of the House of Representatives elected from Tokyo's 2nd district, from across party lines, submitted to the Ministry of Transport and Japanese National Railways a proposal for the electrification of the Tamatsu Line for passenger service, including the installation of Nishi-Oi Station, under five conditions.
Machine translation — show Japanese original
東京都第2区選出衆議院議員（5人、超党派）らが、西大井駅設置等の品鶴線旅客化5条件を運輸省および国鉄に申し入れ。
1973
The Shinagawa Ward presented Japanese National Railways with the three old conditions, including station construction at JNR's expense, measures against level crossings that were often closed, and noise countermeasures, and stated its opposition to the passenger service on the Shinagawa- Tsurumi Line unless these conditions were met.
Machine translation — show Japanese original
品川区は国鉄に、国鉄負担による駅建設、開かずの踏切対策、騒音対策（旧3条件）を提示し、3条件が実現されない限り品鶴線旅客化に反対する旨を申し入れ。
1975
The Japanese National Railways presented a plan to Shinagawa Ward for constructing a station with local burden, and the Shinagawa Ward Council approved the construction of the station with local burden and other conditions, after which Shinagawa Ward and the Japanese National Railways concluded a memorandum.
Machine translation — show Japanese original
国鉄が品川区に、地元負担による駅建設案を提示。品川区議会が地元負担による駅建設等（新3条件）を可決。品川区と国鉄が覚書を締結。
1978
A lawsuit was filed to prohibit the expenditure of residents' funds for the construction of Nishi-Oi Station on the new Yokosuka Line, deeming the investment of public funds by Shinagawa Ward as illegal.
Machine translation — show Japanese original
駅建設費に品川区の公金投入を違法とする「新横須賀線西大井駅建設費支出禁止住民訴訟」提起。
1980
2月12日
The Shinagawa Ward Council passed a resolution in October opposing the opening.
Machine translation — show Japanese original
品川区議会が10月開業反対決議。
1980
6月10日
The court ruled in favor of the plaintiffs in the residents' lawsuit, ordering an injunction against the use of public funds by Shinagawa Ward.
Machine translation — show Japanese original
住民訴訟で原告勝訴（品川区の公金支出差止）判決。
1980
10月1日
Japanese National Railways implemented the passengerization of the Tsurumi Line (separation from freight).
Machine translation — show Japanese original
国鉄は品鶴線旅客化（SM分離）を実施。
1984
Construction of the station by the third sector began.
Machine translation — show Japanese original
第三セクターによる駅建設開始。
1986
On the same day, the Yamanokoshi branch line of the Yokosuka Line began operating temporary trains between Shinjuku Station and Zushi Station.
Machine translation — show Japanese original
同日、横須賀線の蛇窪支線は新宿駅 - 逗子駅間で臨時列車の運行を開始。
1986
4月2日
Nishi-Oi Station opened (for passenger operations only).
Machine translation — show Japanese original
西大井駅開業（旅客営業のみ）。
1987
4月1日
With the privatization of Japanese National Railways, it became a station of East Japan Railway Company (JR East).
Machine translation — show Japanese original
国鉄分割民営化に伴い、東日本旅客鉄道（JR東日本）の駅となる。
1991
7月20日
Automatic ticket gates were installed and began operation.
Machine translation — show Japanese original
自動改札機を設置し、使用開始。
2001
11月18日
The IC card "Suica" becomes available for use.
Machine translation — show Japanese original
ICカード「Suica」の利用が可能となる。
2001
12月1日
The Shonan-Shinjuku Line began operation.
Machine translation — show Japanese original
湘南新宿ライン運行開始。
2007
2月19日
Reserved seat ticket vending machines were installed.
Machine translation — show Japanese original
指定席券売機設置。
2007
3月12日
The Midori no Madoguchi service ended operations.
Machine translation — show Japanese original
みどりの窓口の営業を終了。
2019
11月30日
In 2019, the Sotetsu Line direct train service began operation and the station became a stop, with the first women-only car being introduced on weekday morning trains bound for Shinjuku.
Machine translation — show Japanese original
（令和元年）：相鉄線直通列車が運行開始し、停車駅となる。平日朝の新宿方面行きで、当駅で初めて女性専用車が設定される。
2025
10月1日
The Ekinet Q-Chike service was started.
Machine translation — show Japanese original
えきねっとQチケのサービスを開始。
Timeline adapted from Japanese Wikipedia, available under CC BY-SA 4.0.
Landmarks
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Standard Access
Getting around
Platforms, transfers and navigation
Platform Layout & Transfers
PLATFORM LAYOUT (SAIKYŌ LINE)
2
Up
新宿 · 武蔵浦和 · 大宮
↕ Platform 2 serves this line
PLATFORM LAYOUT (SHŌNAN–SHINJUKU LINE)
2
Up
新宿 · 大宮 · 宇都宮
↕ Platform 2 serves this line
PLATFORM LAYOUT (YOKOSUKA LINE)
1
Down
横浜 · 逗子 · 久里浜
↕ Platform 1 serves this line
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Nishi-Oi Station FAQ
What train lines connect at Nishi-Oi Station?
Nishi-Oi Station is served by Saikyō Line, Shōnan–Shinjuku Line, Yokosuka Line.