Keiyō Line
JE
A Keiyō Line E233-5000 series EMU in May 2018
Overview
Native name京葉線
StatusOperational
OwnerJR East
LocaleTokyo, Chiba Prefecture
Termini
Stations19
Service
TypeCommuter rail
Operator(s) JR East
Depot(s)Narashino
Rolling stockE233-5000 series, 209-500 series
Daily ridership714,053 (Daily 2015)[1]
History
Opened1975
Technical
Line length43 km (27 mi)
CharacterUnderground, at-grade, elevated
Track gauge1,067 mm (3 ft 6 in)
Electrification1,500 V DC overhead catenary
Operating speed100 km/h (62 mph)
Route map

The Keiyō Line (京葉線, Keiyō-sen) is a railway line connecting Tokyo and Chiba in Japan, paralleling the edge of Tokyo Bay. It is operated by the East Japan Railway Company (JR East). The line forms part of what JR East refers to as the "Tokyo Mega Loop" (東京メガループ) around Tokyo, consisting of the Keiyō Line, Musashino Line, Nambu Line, and Yokohama Line.[2] It provides the main rail access to Tokyo Disney Resort and the Makuhari Messe exhibition center.

The terminus at Tokyo Station is located underground, some distance to the south of the main station complex approximately halfway to Yūrakuchō Station. This means transferring between other lines at Tokyo Station can take between 15 and 20 minutes.

The name "Keiyō" is derived from the second character of the names of the locations linked by the line, Tokyo (東京) and Chiba (千葉). It should not be confused with the Keiō Line, a privately operated commuter line in western Tokyo.

Services

Map of the Keiyō Line and surrounding JR lines
  •   Keiyō Line "Local" (各駅停車 kakueki-teisha)trains stop at all stations between Tokyo and Soga except Nishi-Funabashi.
  •   Musashino Line ''Local'' through trains stop at all stations between Tokyo and Nishi-Funabashi before continuing to the Musashino Line. Some trains stop at Nishi-Funabashi, Minami-Funabashi, Shin-Narashino, and Kaihimmakuhari.
  •   Keiyō Line "Rapid" (快速 kaisoku) trains stop at Tokyo, Hatchōbori, Shin-Kiba, Maihama, Shin-Urayasu, Minami-Funabashi, Kaihimmakuhari, and all stops to Soga.
  •   Commuter rapid service (通勤快速, tsūkin-kaisoku) trains stop at Tokyo, Hatchōbori, Shin-Kiba, and Soga.

Station list

  • All trains (except limited express services) stop at stations marked "●" and pass those marked "｜". Trains do not travel past those stations marked "∥".
  • For the Wakashio and Sazanami limited express services, see their respective articles.
No. Station Japanese Distance (km) Keiyō
Line		 Musashino
Line (thru)		 Transfers Location
Between
stations		 Total Local Rapid Comm.
Rapid		 Musashino-Chiba Musashino-Tokyo
TYOJE01
 Tokyo 東京 - 0.0 ● ● ●   ●
Chiyoda Tokyo
JE02 Hatchōbori 八丁堀 1.2 1.2 ● ● ● ● H Tokyo Metro Hibiya Line (H-12) Chūō
JE03 Etchūjima 越中島 1.6 2.8 ● ｜ ｜ ●   Kōtō
JE04 Shiomi 潮見 2.6 5.4 ● ｜ ｜ ●  
JE05 Shin-Kiba 新木場 2.0 7.4 ● ● ● ●
JE06 Kasai-Rinkai Park 葛西臨海公園 3.2 10.6 ● ｜ ｜ ●   Edogawa
JE07 Maihama 舞浜 2.1 12.7 ● ● ｜ ● Disney Resort Line (Resort Gateway) Urayasu Chiba
JE08 Shin-Urayasu 新浦安 3.4 16.1 ● ● ｜ ●  
JE09 Ichikawashiohama 市川塩浜 2.1 18.2 ● ｜ ｜ ●   Ichikawa
JM10 Nishi-Funabashi 西船橋 5.9 24.1 ∥
[* 1]		 ∥ ∥ ● ●
Funabashi
JE10 Futamatashimmachi 二俣新町 4.4 22.6 ● ｜ ｜ ∥
[* 2]		 Distance is from Ichikawashiohama Ichikawa
JE11 Minami-Funabashi 南船橋 3.4 26.0 ● ● ｜ ● Distance between Nishi-Funabashi and Minami-Funabashi is 5.4 km Funabashi
JE12 Shin-Narashino 新習志野 2.3 28.3 ● ｜ ｜ ●   Narashino
JE13 Makuharitoyosuna 幕張豊砂 1.7 30.0 ● ｜ ｜ ● New station which opened on 18 March 2023.[3][4][5] Mihama-ku, Chiba
JE14 Kaihimmakuhari 海浜幕張 1.7 31.7 ● ● ｜ ●  
JE15 Kemigawahama 検見川浜 2.0 33.7 ● ● ｜  
JE16 Inagekaigan 稲毛海岸 1.6 35.3 ● ● ｜  
JE17 Chibaminato 千葉みなと 3.7 39.0 ● ● ｜ Chiba Urban Monorail: Line 1 Chūō-ku, Chiba
Soga 蘇我 4.0 43.0 ● ● ●
  1. ↑ Keiyō trains between Tokyo and Soga do not pass through Nishi-Funabashi.
  2. ↑ Musashino Line trains do not pass through Futamatashimmachi.
  3. ↑ Some local and rapid, and all Commuter Rapid trains, run through to the Uchibō Line (mainly to Kimitsu or Kazusa-Minato) or the Sotobō Line (mainly Kazusa-Ichinomiya, Katsuura, and via the Tōgane Line to Narutō).

Rolling stock

All Keiyō Line and Musashino Line rolling stock is based at the Keiyō Rolling Stock Center near Shin-Narashino Station.

Keiyō Line

Musashino Line through services

  • 209-500 series 8-car EMUs (orange/brown stripe) (since 4 December 2010)[7]
  • E231-0 series 8-car EMUs (orange/brown stripe) (since November 2017)
  • E231-900 series 8-car EMU (orange/brown stripe) (since 20 July 2020)[8]

Former rolling stock

Keiyō Line

  • 103 series 4/6/10-car EMUs (sky blue livery) (from 1986 until November 2005)
  • 165 series 3-car EMU (x1) Shuttle Maihama (from 1990 until 1995)
  • 201 series 10-car EMUs (sky blue livery) (from August 2000 until 20 June 2011)[9]
  • 205-0 series 10-car EMUs (magenta stripe) (from March 1990 until 2011)
  • E331 series 14-car EMU (x1) (magenta stripe) (from March 2007 until 2011)[10]

Musashino Line through services

Inter-running from the Musashino Line to the Keiyō Line commenced on 1 December 1988.[11]

  • 103 series 6-car (later 8-car) EMUs (orange livery) (from 1 December 1988 - 8 December 2005)
  • 201 series 6-car EMUs (orange livery) (from 1 December 1988 - November 1996)
  • 205-0 series 8-car EMUs (orange/brown stripe) (from December 1991 - October 2019)
  • 205-5000 series 8-car EMUs (orange/brown stripe) (from 2002 - 19 October 2020)

Timeline

103 series
165 series
205 series
201 series
E331 series
209-500 series
E233-5000 series
103 series
201 series
205-0 series
205-5000 series
209-500 series
E231-0 series
E231-900 series
│
1985
│
1990
│
1995
│
2000
│
2005
│
2010
│
2015
│
2020
Rolling stock transitions since 1986

History

The Keiyo Line was initially planned as a freight-only line. Its first section opened on 10 May 1975 as a 6.5 km (4.0 mi) link between the Chiba Freight Terminal (now the Mihama New Port Resort between Inagekaigan and Chibaminato Stations) and the freight yard next to Soga Station.[12] Passenger service began on 3 March 1986 between Minami-Funabashi and Chibaminato, and was extended east to Soga and west to Shin-Kiba on 1 December 1988.[12]

The final section of the Keiyo Line between Tokyo and Shin-Kiba opened on 10 March 1990.[12] The platforms at Tokyo Station were originally built to accommodate the Narita Shinkansen, a planned (but never built) high-speed rail line between central Tokyo and Narita International Airport.[13]

Planners originally envisioned the Keiyo Line interfacing with the Rinkai Line at Shin-Kiba, thus providing a through rail connection between Chiba and the Tokyo Freight Terminal in eastern Shinagawa, and also completing the outer loop for freight trains around Tokyo formed by the Musashino Line. This original plan would also allow through service with the Tokaido Main Line, allowing freight trains from central and western Japan to reach Chiba and points east.

However, in the 1990s, as the artificial island of Odaiba began developing as a commercial and tourist area in the middle of the Rinkai Line route, the Rinkai Line was re-purposed for use as a passenger line. While there is a through connection between the Rinkai Line and the Keiyo Line, it is only used by passenger trains in charter service, usually carrying groups to the Tokyo Disney Resort.

Timeline

Future plans

Effective the timetable revision scheduled for 16 March 2024, all rapid and commuter rapid services on the Keiyo Line are set to be discontinued during both the morning and evening rush hour, leaving local service as the only service variation during these time periods.[18] However, following requests from local and prefectural governments, two westbound services to Tokyo Station in the morning rush were reinstated by JR East for the upcoming schedule revision.[19]

References

  1. ↑ "平成27年 大都市交通センサス 首都圏報告書" (PDF). P.92. 国土交通省.
  2. ↑ Saka, Masayuki (August 2014). 東京メガループ 車両・路線の沿革と現況 [Tokyo Megaloop: History and current situation of trains and line]. Tetsudō Daiya Jōhō Magazine (in Japanese). Vol. 43, no. 364. Japan: Kōtsū Shimbun. pp. 28–39.
  3. ↑ 幕張新都心拡大地区新駅設置に係る基本調査結果の概要について (in Japanese). Japan: Chiba Prefectural Government. Archived from the original on 11 August 2019. Retrieved 4 February 2017.
  4. ↑ 幕張新都心拡大地区新駅の事業進捗について (PDF). 30 October 2020.
  5. ↑ ２０２３年３月にダイヤ改正をについて [About the March 2023 timetable revision] (PDF). 12 December 2022.
  6. ↑ "E233系5000番代 営業運転開始 (E233-5000 series enters revenue service)". Hobidas (in Japanese). Neko Publishing. 1 July 2010. Archived from the original on 25 March 2017. Retrieved 24 March 2014.
  7. ↑ JR電車編成表 2013夏 [JR EMU Formations - Summer 2013]. Japan: JRR. May 2013. p. 47. ISBN 978-4-330-37313-3.
  8. ↑ "【元209系】E231系900番台試作車・MU1編成として武蔵野線で"再出発"" [[Former 209 series] E231-900 series prototype train restarts on Musashino Line as MU1]. 20 July 2020.
  9. ↑ 京葉線の201系が定期運用を終える [Keiyō Line 201 series withdrawn from regular service]. Japan Railfan Magazine Online (in Japanese). Japan: Koyusha Co., Ltd. 21 June 2011. Retrieved 21 June 2011.
  10. ↑ "E331系AK1編成長野へ配給" [E331 series set AK1 moved to Nagano]. RM News (in Japanese). Japan: Neko Publishing Co., Ltd. 27 March 2014. Archived from the original on 27 March 2014. Retrieved 10 April 2014.
  11. ↑ 首都圏鉄道完全ガイド 主要JR路線編 [Tokyo Area Complete Railway Guide - Major JR Lines]. Japan: Futabasha. 6 December 2013. pp. 87–97. ISBN 978-4-575-45414-7.
  12. 1 2 3 Ishino, Tetsu, ed. (1998). 停車場変遷大辞典 国鉄・JR編 [Station Transition Directory - JNR/JR]. Vol. I. Japan: JTB. p. 211. ISBN 4-533-02980-9.
  13. ↑ "東京駅の京葉線、なぜ遠い？近道は有楽町 成田新幹線構想を再利用" [Why is Keiyo Line so far away at Tokyo Station?]. Nikkei Shimbun. 4 February 2014. Retrieved 4 February 2014. (registration required)
  14. 1 2 3 4 5 6 Kubo, Satoshi (August 2015). 東京駅開業100周年-5 京葉線ターミナル [Tokyo Station 100th Anniversary (5) Keiyo Line Terminal]. Japan Railfan Magazine (in Japanese). Vol. 55, no. 652. Japan: Koyusha Co., Ltd. p. 105.
  15. ↑ "⾸都圏エリアへ 「駅ナンバリング」を導⼊します" [Introduce “station numbering” to the Tokyo metropolitan area] (PDF). jreast.co.jp (in Japanese). 6 April 2016. Archived from the original (PDF) on 7 December 2022. Retrieved 7 January 2023.
  16. ↑ Kusamachi, Yoshikazu (7 April 2016). "JA・JK・JT・AKB…JR東日本、首都圏で駅ナンバリングなど導入へ" [JA, JK, JT, AKB … JR East to introduce station numbering in the Tokyo metropolitan area]. Response Automotive Media (in Japanese). Archived from the original on 6 August 2022. Retrieved 7 January 2023.
  17. ↑ "幕張新都心エリアの新駅「幕張豊砂駅」開業 千葉県内では25年ぶり". newsdig.tbs.co.jp. 18 March 2023. Retrieved 18 March 2023.
  18. ↑ "朝時間帯の2本が各駅停車から快速に変更へ！　2024年3月ダイヤ改正内容の一部変更" [Partial Changes To Schedule Revisions in March 2024 Include Changing Two Trains to Run Rapid Service]. rail.hobidas.com (in Japanese). 17 January 2024.
  19. ↑ "JR東日本ダイヤ改正 京葉線 早朝の上り快速2本の運行継続決定" [JR East Revises March Schedule Revision; Reinstates Rapid Service in the Morning Rush]. NHK News (in Japanese). 16 January 2024.
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