Sazanami

A E257-500 series EMU on aSazanami service in October 2006
Overview
Service type	Limited express
Status	Operational
Locale	Chiba Prefecture
First service	15 July 1972
Current operator	JR East
Former operator	JNR
Route
Termini	Tokyo Kimitsu
Distance travelled	128.9 km (80.1 mi)
Lines used	Keiyo Line,Uchibo Line,Chūō Line,Sobu Line
On-board services
Catering facilities	Trolley service
Technical
Rolling stock	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)

TheSazanami (さざなみ) is alimited express train service in Japan operated byEast Japan Railway Company (JR East). It runs betweenTokyo andTateyama via theKeiyo Line andUchibō Line.^[1]

SeasonalShinjuku Sazanami services operate "mainly on weekends and holidays when service is heavy"^[2] betweenShinjuku and Tateyama via theChūō Line andSōbu Line. As of March 2024, trains no longer stop atAkihabara orTsudanuma.^[2]

As of 12 March 2022, 5 outbound trains and 3 inbound trains are operated each day, except on Saturdays and holidays.^[3] These trains stop at the following stations listed below:

Tokyo -Soga -Goi - (Anegasaki) -Kisarazu -Kimitsu

• E257-500 series 5-car EMUs

• 
  A E257-500 series EMU on aShinjuku Sazanami service in May 2010 at Akihabara Station

• 183/189 series 9-car EMUs^[4]
• 255 series 9-car EMUs^[4]

• 
  A 189 series EMU on aShinjuku Sazanami service in February 2007
• 
  A 255 series EMU on aSazanami service in March 2008

Sazanami trains are formed as shown below, with car 1 at the Tokyo end.^[3]

• 15 July 1972 -Sazanami service starts coinciding with opening of the undergroundSōbu Line platforms at Tokyo Station.
• 16 March 1991 -Sazanami service are rerouted via theKeiyo Line from Tokyo.
• 2 July 1993 - 255 series EMUs are introduced onView Sazanami services from Tokyo toChikura.
• 16 October 2004 - E257-500 series EMUs are introduced.
• 10 December 2005 - TheView Sazanami name is discontinued, and all services are made entirely no-smoking.^[5]

The opening of theTokyo 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 theSazanami services.^[6] From the start of the 15 March 2014 timetable revision, the number of services was reduced to six return workings daily.^[6]

• List of named passenger trains of Japan

Wikimedia Commons has media related toSazanami (train).

• JR East 255 series Shiosai/Wakashio/Sazanami(in Japanese)
• JR East E257 series Wakashio/Sazanami/Shiosai/Ayame(in Japanese)

• East Japan Railway Company
• Named passenger trains of Japan
• Railway services introduced in 1972
• 1972 establishments in Japan

• CS1 uses Japanese-language script (ja)
• CS1 Japanese-language sources (ja)
• Articles with short description
• Short description matches Wikidata
• Use dmy dates from March 2016
• Articles containing Japanese-language text
• Commons category link is on Wikidata
• Articles with Japanese-language sources (ja)