An E257-500 series EMU on a Wakashio service in July 2010
|Service type||Limited express|
|First service||15 July 1972|
|Current operator(s)||JR East|
|Distance travelled||132.5 km (82.3 mi)|
|Service frequency||12 return trips daily|
|Line used||Keiyo Line, Sotobo Line|
|Catering facilities||Trolley service|
|Rolling stock||255 series, E257-500 series EMUs|
|Track gauge||1,067 mm (3 ft 6 in)|
|Electrification||1,500 V DC overhead|
|Operating speed||120 km/h (75 mph)|
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 Boso Peninsula in Chiba Prefecture.
Wakashio services operate over the Keiyo Line and Sotobo Line, stopping at the following stations. Some services terminate at Kazusa-Ichinomiya, and some services operate as "Local" all-stations services between Katsuura and Awa-Kamogawa.
Shinjuku Wakashio services, operating mainly at weekends only, stop at the following stations between Shinjuku and Soga.
- 183 series 9-car EMUs (15 July 1972 – October 2004)
9-car 255 series
|Numbering||KuHa 254||MoHa 254||MoHa 255||SaRo 255||SaHa 254||SaHa 255||MoHa 254||MoHa 255||KuHa 255|
5-car E257 series
|Numbering||KuHa E256-500||MoHa E257-1500||MoHa E256-500||MoHa E257-500||KuHa E257-500|
Car 1 is non-reserved on some services, and car 3 is reserved on some services.
5+5-car E257 series
|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|
9-car 183 series
- All cars except the Green car were non-reserved for Ohayo Wakashio and Hometown Wakashio services.
The Wakashio service commenced on 15 July 1972, using 183 series EMUs. Evening Hometown Wakashio services for commuters were introduced from 16 March 1991, operating from Tokyo to Kazusa-Ichinomiya. New 255 series EMUs were introduced from 2 July 1993, initially branded as View Wakashio. Morning Oyaho Wakashio services for commuters were introduced from 3 December 1994, operating from Kazusa-Ichinomiya to Tokyo. New E257-500 series EMUs were introduced from 16 October 2004, displacing the remaining 183 series trainsets. From the start of the revised timetable on 10 December 2005, Wakashio services were made entirely no-smoking.
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. From the start of the 15 March 2014 timetable revision, the number of services was reduced from 15 to 13 return workings daily.
- JR Timetable. Japan: Kotsu Shimbunsha. April 2016. p. 95-95, 984.
- 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.
- 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.
- 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.
- 列車名鑑1995 [Train Name Directory 1995]. Japan: Railway Journal. August 1995. p. 130.
- 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.
- 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.
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