E257-500 Sazanami Kaihin-Makuhari 20061021.JPG
A E257-500 series EMU on a Sazanami service in October 2006
Service typeLimited express
LocaleChiba Prefecture
First service15 July 1972
Current operator(s)JR East
Former operator(s)JNR
Distance travelled128.9 km (80.1 mi)
Service frequency4 return services daily
Line(s) usedKeiyo Line, Uchibo Line, Sobu Line
On-board services
Catering facilitiesTrolley service
Rolling stockE257-500 series EMUs
Track gauge1,067 mm (3 ft 6 in)
Electrification1,500 V DC overhead
Operating speed120 km/h (75 mph)

The Sazanami (さざなみ) is a limited express train service in Japan operated by East Japan Railway Company (JR East). It runs between Tokyo and Tateyama via the Keiyo Line and Uchibō Line.[1]

Seasonal Shinjuku Sazanami services operate at certain weekends between Shinjuku and Tateyama.

Principal stations served Tokyo - Soga - Goi - (Anegasaki) - Kisarazu - Kimitsu

Rolling stock

Former rolling stock


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 Sazanami services.[4] From the start of the 15 March 2014 timetable revision, the number of services was reduced to six return workings daily.[4]

See also


  1. ^ JR新幹線&特急列車ファイル [JR Shinkansen & Limited Express Train File]. Japan: Kotsu Shimbun. 2008. p. 66. ISBN 978-4-330-00608-6.
  2. ^ a b 日本と世界の鉄道カタログ'97~'98 [Japan and World Railway Catalogue 1997-1998] (in Japanese). Japan: Seibido Publishing. 17 August 1997. pp. 147, 157. ISBN 4-415-09254-3.
  3. ^ 2005年12月ダイヤ改正について [Details of December 2005 Timetable Revision] (PDF) (Press release) (in Japanese). East Japan Railway Company. 30 September 2005. Retrieved 25 June 2012.
  4. ^ 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. Archived from the original on 26 March 2014. Retrieved 26 March 2014.