The is an electric multiple unit (EMU) commuter train type operated by the private railway operator Sagami Railway ("Sotetsu") in Japan in the Tokyo area since February 2018. Ultimately intended to be used on through-running services between Sotetsu and Tokyu Corporation lines commencing in late fiscal 2022, the first train entered revenue service on 11 February 2018, replacing a 7000 series set.
Eight-car sets designated as 21000 series were announced in April 2021, the first of which entered service in September 2021.
Design The fleet of ten-car 20000 series trainsets is being built by Hitachi at its Kasado Factory in Kudamatsu, Yamaguchi. Externally, the trains carry the "Yokohama Navy Blue" corporate livery introduced for refurbished 9000 series trains.
Formation 20000 series
The trains are formed as ten-car sets, as follows, with five motored ("M") cars and five non-powered trailer ("T") cars, and car 1 at the Yokohama end.
Car No. 1 2 3 4 5 6 7 8 9 10 Designation Tc2 M1 T1 M2 M3 T2 M4 T3 M5 Tc1 Numbering 2010x 2020x 2030x 2040x 2050x 2060x 2070x 2080x 2090x 2000x Weight (t) 29.9 31.7 29.8 31.1 31.2 26.9 31.7 29.1 31.1 30.0 Capacity (seated/total) 45/133 51/144 51/143 51/143 51/143 51/143 51/143 51/143 51/143 45/133
21000 series
The trains are formed as eight-car sets with four motored ("M") cars and four non-powered trailer ("T") cars, and car 1 at the Yokohama end, as follows.
Car No. 1 2 3 4 5 6 7 8 Designation Tc2 M1 T1 M2 M3 T2 M4 Tc1 Numbering 2110x 2120x 2130x 2140x 2150x 2160x 2170x 2180x Weight (t) 29.9 31.7 29.8 31.1 31.7 29.1 31.1 30.0 Capacity (seated/total) 45/133 51/144 51/143 51/143 51/143 51/143 51/143 45/133
Interior Passenger accommodation consists of longitudinal bench seating with grey moquette seat covers. Each car includes a space for wheelchairs and pushchairs.
The colour temperature of the interior LED lighting is adjusted automatically according to time of day and season as follows (hues shown are illustrative only).
Season Time of day Colour temperature [K] Intensity [%] Spring(1 April - 30 June) Early morning 02:01:00 - 06:59:59 4400 90 Morning peak 07:00:00 - 09:59:59 5000 90 Daytime 10:00:00 - 15:59:59 4400 90 Evening 16:00:00 - 17:59:59 4400 90 Night 18:00:00 - 02:00:59 3000 100 Summer(1 July - 30 September) Early morning 02:01:00 - 06:59:59 5000 90 Morning peak 07:00:00 - 09:59:59 5000 90 Daytime 10:00:00 - 15:59:59 5000 90 Evening 16:00:00 - 17:59:59 4400 90 Night 18:00:00 - 02:00:59 3000 100 Autumn(1 October - 31 December) Early morning 02:01:00 - 06:59:59 4400 90 Morning peak 07:00:00 - 09:59:59 4400 90 Daytime 10:00:00 - 15:59:59 4400 90 Evening 16:00:00 - 17:59:59 3800 100 Night 18:00:00 - 02:00:59 3000 100 Winter(1 January - 31 March) Early morning 02:01:00 - 06:59:59 3300 100 Morning peak 07:00:00 - 09:59:59 3800 100 Daytime 10:00:00 - 15:59:59 4400 90 Evening 16:00:00 - 17:59:59 4400 90 Night 18:00:00 - 02:00:59 3000 100
History
Details of the new trains were officially announced in June 2017. The first train set was delivered from the Hitachi factory in Kudamatsu, Yamaguchi, in late July 2017.
Originally scheduled to enter revenue service in December 2017, scheduled service entry was subsequently postponed until 11 February 2018.
21000 series An order for a shorter version of the 20000 series was announced on 28 April 2021. These eight-car sets will be designated as 21000 series, and are to be operated through to lines of Tokyu Corporation. The first 21000 series set entered service on 6 September 2021.
nine 21000 series sets have been built.
References
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