Ōimachi Line

The Ōimachi Line (大井町線, 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.

Ōimachi Line
OM
A 6020 series EMU on an Ōimachi Line express service in December 2018
Overview
Native name大井町線
Owner Tōkyū Railways
LocaleTokyo
Termini
Stations16
Color on map  Orange (#f18c43)
Service
TypeRapid transit
Daily ridership511,214 (FY2018)[1]
History
Opened6 July 1927 (6 July 1927)
Technical
Line length12.4 km (7.7 mi)
Track gauge1,067 mm (3 ft 6 in)
Electrification1,500 V DC overhead catenary
Operating speed95 km/h
Route map
km
0.0
 Ōimachi
JK R
Tokyo Waterfront Area
Rapid Transit
0.8
 Shimo-Shimmei
Yokosuka Line
Tōkaidō Shinkansen
1.5
 Togoshi-kōen
Toei Asakusa Line
2.1
 Nakanobu
2.7
 Ebaramachi
Tōkyū Ikegami Line
3.2
 Hatanodai
4.0
 Kita-Senzoku
Tōkyū Meguro Line
4.8
 Ōokayama
Okusawa depot
5.3
 Midorigaoka
6.3
 Jiyūgaoka
Tōkyū Tōyoko Line
Jiyūgaoka depot
7.1
 Kuhombutsu
7.8
 Oyamadai
8.3
 Todoroki
9.2
 Kami-noge
Tōkyū Den-en-toshi Line
10.4
 Futako-Tamagawa
Tama
River
Tokyo
Kanagawa
border
11.1
 Futako-Shinchi
11.7
 Takatsu
12.4
 Mizonokuchi
Musashi-
Mizonokuchi
Nambu
line
Kajigaya
Kajigaya depot
Saginuma depot
 Saginuma
Nagatsuta
Nagatsuta depot
 Chūō-Rinkan

Stations

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.

On weekends, two seven-car express trains per days are operated to/from Ōimachi and Nagatsuta on the Tokyu Den-en-toshi Line. Also, a few trains are operated through down to Saginuma in the late evenings. A few express trains during the holidays also serve from Chūō-Rinkan in the mornings, down in the evenings.

No. Station Japanese Distance (km) Stops Transfers Location
"Blue"
Local		 "Green"
Local		 Express
OM01 Ōimachi 大井町 0.0
●
●
●
Shinagawa Tokyo
OM02 Shimo-shimmei 下神明 0.8
●
●
|
OM03 Togoshi-kōen 戸越公園 1.5
●
●
|
OM04 Nakanobu 中延 2.1
●
●
|
 A Toei Asakusa Line (A03)
OM05 Ebaramachi 荏原町 2.7
●
●
|
OM06 Hatanodai 旗の台 3.2
●
●
●
 IK Tokyu Ikegami Line (IK05)
OM07 Kita-senzoku 北千束 4.0
●
●
|
 Ōta
OM08 Ōokayama 大岡山 4.8
●
●
●
 MG Tokyu Meguro Line (MG06) Meguro
OM09 Midorigaoka 緑が丘 5.3
●
●
|
OM10 Jiyūgaoka 自由が丘 6.3
●
●
●
 TY Tokyu Toyoko Line (TY07)
OM11 Kuhombutsu 九品仏 7.1
●
●
|
 Setagaya
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 (DT07)
DT08 Futako-shinchi 二子新地 11.1
●
|
|
 DT Tokyu Den-en-toshi Line (DT08) Takatsu-ku, Kawasaki Kanagawa
DT09 Takatsu 高津 11.7
●
|
|
 DT Tokyu Den-en-toshi Line (DT09)
OM16 Mizonokuchi 溝の口 12.4
●
●
●

Rolling stock

Local services
  • A 9000 series EMU in December 2021
    A 9000 series EMU in December 2021
  • A 9020 series EMU in December 2021
    A 9020 series EMU in December 2021

Express services
  • 6000 series seven-car EMUs (since March 2008, originally delivered as six-car sets)
  • 6020 series seven-car EMUs (from March 2018)
  • A 6000 series EMU in March 2018
    A 6000 series EMU in March 2018
  • A 6020 series EMU in December 2018
    A 6020 series EMU in December 2018

Former rolling stock

History
  • 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.[3] Since December 2018, "Q Seat" reserved seating has been implemented on some express services that run between Ōimachi and Nagatsuta stations.[4]

References
  • 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. "TOKYU CORPORATION 2019-2020". www.tokyu.co.jp. Retrieved 6 August 2023.
  2. Hirose, Atsushi (18 February 2019). "東急2000系改め，9020系が登場" [Tokyu 2000 series reclassified as 9020 series]. Japan Railfan Magazine Online (in Japanese). Retrieved 20 December 2021.
  3. 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 Ōimachi 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.
  4. "東急東横線「Q SEAT」導入、10両中2両をロング・クロス転換車両に". Mynavi News (in Japanese). Tokyu Toyoko Line "Q Seat" to be introduced, 2 out of 10 cars to use rotating transverse seating. 29 July 2022. Retrieved 30 July 2022.{{cite web}}: CS1 maint: others (link)
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