The Wakashio (わかしお) is a limited express train service in Japan operated by the East Japan Railway Company (JR East). It runs from Tokyo to Kazusa-Ichinomiya and Awa-Kamogawa on the Bōsō Peninsula in Chiba Prefecture.

JR East 255 Series Mari Be-05 Shinjuku-Wakashio.jpg
255 series EMUs on a Wakashio service in April 2019
Service typeLimited express
LocaleChiba Prefecture
First service15 July 1972
Current operator(s)JR East
Former operator(s)JNR
Distance travelled132.5 km (82.3 mi)
Service frequency12 return trips daily
Line(s) usedKeiyo Line, Sotobo Line
On-board services
Catering facilitiesTrolley service
Rolling stock255 series, E257-500 series EMUs
Track gauge1,067 mm (3 ft 6 in)
Electrification1,500 V DC overhead
Operating speed120 km/h (75 mph)

Station stopsEdit

Wakashio services operate over the Keiyo Line and Sotobo Line, stopping at the following stations.[1] Some services terminate at Kazusa-Ichinomiya, and some services operate as "Local" all-stations services between Katsuura and Awa-Kamogawa.[2] From March 2018, all trains pass through Ubara and Awa-Amatsu stations[3].

Tokyo - Kaihimmakuhari※ - Soga - Toke※ - Ōami - Mobara - Kazusa-Ichinomiya - Ōhara - Onjuku - Katsuura - Kazusa-Okitsu※ - Awa-Kominato - Awa-Kamogawa
※:Some trains pass through these stations.

Shinjuku Wakashio services, operating mainly at weekends only, stop at the following stations between Shinjuku and Soga.[1]

Shinjuku - Akihabara - Kinshichō - Funabashi - Tsudanuma - Chiba - Soga ... Awa-Kamogawa

Rolling stockEdit

Wakashio services are operated using Makuhari-based 9-car 255 series EMU and 5- or 10-car E257-500 series EMU formations. The E257-500 series formations have no Green (first class) cars.[2]


  • 183 series 9-car EMUs (15 July 1972 – October 2004)


Trains are formed as shown below, with car 1 at the Tokyo end.[1][4][5]

9-car 255 seriesEdit

Car No. 1 2 3 4 5 6 7 8 9
Numbering KuHa 254 MoHa 254 MoHa 255 SaRo 255 SaHa 254 SaHa 255 MoHa 254 MoHa 255 KuHa 255
Accommodation Non-reserved Reserved Reserved Green Reserved Non-reserved Non-reserved Non-reserved Non-reserved

5-car E257 seriesEdit

Car No. 1 2 3 4 5
Numbering KuHa E256-500 MoHa E257-1500 MoHa E256-500 MoHa E257-500 KuHa E257-500
Accommodation Reserved Reserved Non-reserved Non-reserved Non-reserved

Car 1 is non-reserved on some services.[1][5]

5+5-car E257 seriesEdit

Car No. 1 2 3 4 5 6 7 8 9 10
Numbering KuHa E256-500 MoHa E257-1500 MoHa E256-500 MoHa E257-500 KuHa E257-500 KuHa E256-500 MoHa E257-1500 MoHa E256-500 MoHa E257-500 KuHa E257-500
Accommodation Non-reserved Non-reserved Non-reserved Reserved Reserved Reserved Reserved Reserved Non-reserved Non-reserved

Cars 4,5,6,7 and 8 are non-reserved on some services.[5]

Past formationsEdit

Trains were originally formed of 9-car 183 series EMUs with formed as shown below, including one Green car, as shown below.[6]

9-car 183 seriesEdit

Car No. 1 2 3 4 5 6 7 8 9
Accommodation Reserved Reserved Reserved Green Non-reserved Non-reserved Non-reserved Non-reserved Non-reserved
  • All cars except the Green car were non-reserved for Ohayo Wakashio and Hometown Wakashio services.[6]


The Wakashio service commenced on 15 July 1972, using 183 series EMUs.[7] Evening Hometown Wakashio services for commuters were introduced from 16 March 1991, operating from Tokyo to Kazusa-Ichinomiya.[8] New 255 series EMUs were introduced from 2 July 1993, initially branded as View Wakashio.[8] Morning Oyaho Wakashio services for commuters were introduced from 3 December 1994, operating from Kazusa-Ichinomiya to Tokyo.[8] New E257-500 series EMUs were introduced from 16 October 2004, displacing the remaining 183 series trainsets.[2] From the start of the revised timetable on 10 December 2005, Wakashio services were made entirely no-smoking.[4]

The opening of the Tokyo Bay Aqua-Line road across the Tokyo Bay in 1997 saw increased competition from long-distance bus services offering cheaper fares, resulting in decreasing ridership figures on the Wakashio services.[9] From the start of the 15 March 2014 timetable revision, the number of services was reduced from 15 to 13 return workings daily.[9]

See alsoEdit


  1. ^ a b c d JR Timetable. Japan: Kotsu Shimbunsha. April 2016. p. 95–95, 984.
  2. ^ a b c JR新幹線&特急列車ファイル [JR Shinkansen & Limited Express Train File]. Japan: Kōtsū Shimbun. 2008. p. 66. ISBN 978-4-330-00608-6.
  3. ^ Information about schedule change in March 2017- EAST JAPAN RAILWAY COMPANY Chiba branch、2017-12-15
  4. ^ a b JR電車編成表 2012冬 [JR EMU Formations - Winter 2012]. Japan: JRR. October 2011. pp. 50–51. ISBN 978-4-330-25611-5.
  5. ^ a b c 千葉を走る列車>わかしお:EAST JAPAN RAILWAY COMPANY Chiba branch (Japanese)
  6. ^ a b こだわりの新幹線&特急列車ガイド [In-depth Shinkansen & Limited Express Guide]. Japan: Ikaros Publishing. August 2000. pp. 84–85. ISBN 4-87149-284-2.
  7. ^ 列車名鑑1995 [Train Name Directory 1995]. Japan: Railway Journal. August 1995. p. 130.
  8. ^ a b c Teramoto, Mitsuteru (July 2001). 国鉄・JR列車名大辞典 [JNR & JR Train Name Encyclopedia]. Tokyo, Japan: Chuoshoin Publishing Co., Ltd. pp. 608–609. ISBN 4-88732-093-0.
  9. ^ a b 房総特急 引き潮 高速道充実で利用者減少 [Boso limited expresses ebbing: Passenger numbers falling due to improved expressway network]. Tokyo Shimbun Web (in Japanese). Japan: The Chunichi Shimbun. 25 March 2015. Retrieved 26 March 2014.

External linksEdit