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Tōkyū Ōimachi Line

The Tokyu Oimachi Line (東急大井町線, Tōkyū Ōimachi-sen) is a railway line in Japan operated by the private railway operator Tokyu Corporation. It extends from Ōimachi in Shinagawa, Tokyo, to Mizonokuchi in Kawasaki, Kanagawa.

Tokyu Oimachi Line
Tokyu 6020 series Ōimachi Line 20181228.jpg
A 6020 series EMU on an Oimachi Line express service in December 2018
Native name東急大井町線
TypeRapid transit
Opened6 July 1927
OwnerTokyuLogotype.svg Tokyu Corporation
Line length12.4 km (7.7 mi)
Track gauge1,067 mm (3 ft 6 in)
Electrification1,500 V DC overhead catenary


All-stations "Local" services are classified as blue and green. The latter runs on the express track between Futako-Tamagawa and Mizonokuchi and does not stop at Futako-Shinchi or Takatsu. Limited-stop "Express" services are also provided.

No. Station Japanese Distance (km) Stops Transfers Location
OM01 Ōimachi 大井町 0.0
Shinagawa Tokyo
OM02 Shimo-Shinmei 下神明 0.8
OM03 Togoshi-kōen 戸越公園 1.5
OM04 Nakanobu 中延 2.1
A Toei Asakusa Line
OM05 Ebaramachi 荏原町 2.7
OM06 Hatanodai 旗の台 3.2
IK Tokyu Ikegami Line
OM07 Kita-Senzoku 北千束 4.0
OM08 Ōokayama 大岡山 4.8
MG Tokyu Meguro Line Meguro
OM09 Midorigaoka 緑が丘 5.3
OM10 Jiyūgaoka 自由が丘 6.3
TY Tokyu Toyoko Line
OM11 Kuhombutsu 九品仏 7.1
OM12 Oyamadai 尾山台 7.8
OM13 Todoroki 等々力 8.3
OM14 Kaminoge 上野毛 9.2
OM15 Futako-Tamagawa 二子玉川 10.4
DT Tokyu Den-en-toshi Line
DT08 Futako-Shinchi 二子新地 11.1
DT Tokyu Den-en-toshi Line Takatsu-ku, Kawasaki Kanagawa
DT09 Takatsu 高津 11.7
DT Tokyu Den-en-toshi Line
OM16 Mizonokuchi 溝の口 12.4

Rolling stockEdit

Local servicesEdit

Express servicesEdit

  • 6000 series seven-car EMUs (since March 2008, originally delivered as six-car sets)
  • 6020 series seven-car EMUs (from March 2018)

Former Rolling StockEdit


  • 6 July 1927: The section between Ōimachi and Ōokayama was opened by the Meguro-Kamata Electric Railway (目黒蒲田電鉄).
  • 1 November 1929: The section between Jiyūgaoka and Futako-Tamagawa was opened by the Meguro-Kamata Electric Railway.
  • 25 December 1929: The section between Ōokayama and Jiyūgaoka was opened by Meguro-Kamata Electric Railway.
  • 29 June 1938: The Meguro-Kamata Railway was absorbed into the Tokyo-Yokohama Electric Railway (東京横浜電鉄).
  • 15 January 1958: Electric supply was raised to 1,500 V DC.
  • 11 October 1963: The line was renamed the Den-en-toshi Line, together with the section south of Futako-Tamagawa.
  • 16 November 1977: Through running started between Shibuya and Nagatsuta.
  • 12 August 1979: The line was renamed the Ōimachi Line and separated from the Den-en-toshi Line south of Futako-Tamagawa.
  • 23 February 2008: ATS was replaced by ATC.
  • 28 March 2008: Express services started.
  • 11 July 2009: The Ōimachi Line was extended to Mizonokuchi from Futako-Tamagawa.

Express services on the line were lengthened from six to seven cars in late fiscal 2017, and the platforms at Ōimachi, Hatanodai, and Jiyūgaoka were lengthened to handle the longer trains.[1]


  • 80周年を迎え進化する東急大井町線-その1-. Japan Railfan Magazine (in Japanese): 118–125. July 2008.
  1. ^ 田園都市線および大井町線の朝ラッシュ時の混雑緩和施策を実施 [Measures implemented to alleviate morning rush-hour overcrowding on Denentoshi and Oimachi Lines] (PDF). News release (in Japanese). Japan: Tokyu Corporation. 22 March 2017. p. 2. Archived (PDF) from the original on 23 March 2017. Retrieved 23 March 2017.