121 series

{{short description|Japanese electric multiple unit train type}} {{Use dmy dates|date=June 2021}} {{Infobox train | name = 121 series 7200 series | image = JNR 121 series 04.jpg | imagesize = 300px | caption = A pair of 121 series sets on the Yosan Line in May 2009 | service = {{Plainlist| * March 1987 – 2019 (as 121 series) * April 2016 – present (as 7200 series) }} | manufacturer = [[Hitachi]], [[Kawasaki Heavy Industries]], [[Kinki Sharyo]], [[Tokyu Car Corporation]] | factory = | family = | replaced = 121 series (until 2019) | yearconstruction = 1986–1987 | yearservice = | refurbishment = 2016–2019 | yearscrapped = | numberconstruction = | numberbuilt = 38 vehicles (19 sets) | numberservice = 38 vehicles (19 sets) | numberpreserved = | numberscrapped = | formation = 2 cars per trainset | fleetnumbers = | capacity = | operator = '''121 series:''' [[JNR]] (1987) [[JR Shikoku]] (1987–2019) ''' 7200 series:''' JR Shikoku (2016–present) | depots = Takamatsu | lines = [[Dosan Line]], [[Yosan Line]] | carbody = Stainless steel | trainlength = | carlength = {{convert|20000|mm|ftin|abbr=on}} | width = {{convert|2800|mm|ftin|abbr=on}} | height = {{convert|3670|mm|ftin|abbr=on}} | floorheight = {{convert|1180|mm|ftin|abbr=on}} | entrylevelorstep = | doors = 3 pairs per side | maxspeed = {{convert|100|km/h|mph|abbr=on}} | weight = | acceleration = {{cvt|2.0|km/h/s}} | deceleration = | traction = {{Plainlist| * '''121 series:''' {{nowrap|[[Resistor|Resistor control]]}} * '''7200 series:''' {{nowrap|Toyo S-CS63A [[IGBT]]-[[VVVF]]}} }} | traction motors = {{Plainlist| * MT55A (121 series) * S-MT64 (7200 series)}} | poweroutput = '''121 series:''' 110 kW x 4 '''7200 series:''' 140 kW x 4 | transmission = | aux = | powersupply = | hvac = | electricsystem = {{1,500 V DC}} ([[overhead catenary]]) | collectionmethod = [[Pantograph (transport)|Pantograph]] | bogies = ''' 121 series: ''' DT33A (motored) DT12T (trailer) ''' 7200 series: ''' S-DT67ef (motored) S-TR67ef (trailer) | brakes = | safety = | coupling = | multipleworking = ''' 7200 series: ''' [[JR Shikoku 7000 series|7000 series]] | gauge = {{RailGauge|1067mm|lk=on}} }} The {{nihongo|'''121 series'''|121系}} is an [[electric multiple unit]] (EMU) train type introduced in March 1987 by [[Japanese National Railways]] (JNR), and currently operated by [[Shikoku Railway Company]] (JR Shikoku) on local services in [[Shikoku]], Japan, as the 7200 series.<ref name="haraguchi2009">{{cite book | last = Haraguchi| first = Takayuki | script-title=ja: Encyclopedia of JR's Railway Cars: ＪＲ全車輌 | publisher = Sekai Bunka | date = 2009 | location = Japan | page = 75| isbn = 978-4-418-09905-4| title = Jr全車両: ビジュアル決定版 }}</ref><ref name="neko2009">{{cite book | script-title=ja: JR全車輌ハンドブック2009 |trans-title= JR Rolling Stock Handbook 2009| publisher = Neko Publishing | date = 2009 | location = Japan | page = 256| isbn = 978-4-7770-0836-0|title= Jēāru zensharyō handobukku: Rail Magazine 2009}}</ref>

==Design== The 121 series design was based on the earlier [[105 series]], with lightweight stainless steel bodies.<ref name="railfan664_1">{{cite magazine|last = Fukuhara|first = Shunichi|script-title=ja: 121系近郊形直流電車のあゆみ part1|trans-title= The history of the 121 series suburban DC EMU trains (part 1)|magazine = [[Japan Railfan Magazine]] |volume = 56|issue = 664 |pages = 84–87 |publisher = Koyusha Co., Ltd. |location = Japan |language = Japanese |date = August 2016}}</ref>

The motor bogies were the same DT33A bogies as used on the JNR-era [[103 series]] EMUs, and the trailer cars used DT21T bogies recovered from withdrawn [[101 series]] EMUs.<ref name="railfan665">{{cite magazine|last = Fukuhara|first = Shunichi|script-title=ja: 121系近郊形直流電車のあゆみ part2|trans-title= The history of the 121 series suburban DC EMU trains (part 2)|magazine = [[Japan Railfan Magazine]] |volume = 56|issue = 665 |pages = 94–99 |publisher = Koyusha Co., Ltd. |location = Japan |language = Japanese |date = September 2016}}</ref> The [[Pantograph (rail)|pantographs]] were also recovered from withdrawn 101 series EMUs.<ref name="railfan665"/>

<gallery> File:JRS EC kuha120-14 DT21T.jpg|A DT21T trailer bogie </gallery>

==Operations== The sets are based at [[Takamatsu, Kagawa|Takamatsu]] Depot and operate on the [[Yosan Line]] and [[Dosan Line]] in 2-, 4-, or 6-car formations.<ref name="neko2009"/><ref name="jrr2016_summer"/>

==Formations== In 2019 the fleet consisted of 18 two-car 121 series sets and one 7200 series formed of one motored "Mc" car and one non-powered "Tc" trailer car as shown below with the motored "Mc" cars at the Takamatsu end.<ref name="jrr2016_summer">{{cite book |script-title=ja: JR電車編成表 2016夏 |trans-title= JR EMU Formations - Summer 2016 |publisher = Kotsu Shimbunsha |date = 20 May 2016 |location = Japan |language = Japanese |page = 205|isbn = 978-4-330-68216-7|title= Jr電車編成表 }}</ref>

As of December 2024, the 7200 series trains were being used for stopping and rapid services on the Dosan Line (Tadotsu - Kotohira) and the Yosan Line (Takamatsu - Iyo-Saijo). Some of the services consist of three or four coaches with 7000 series.<ref>{{Cite web |title=JR Shikoku 7200 series - The Red List of Trains in Japan |url=https://bateman.monologue.jp/en/articles/JR/jrs7200.html |access-date=2025-04-20 |website=bateman.monologue.jp}}</ref>

===121 series===

{| class="wikitable" |- ! Designation | Mc || Tc |- ! Numbering | KuMoHa 121 || KuHa 120 |- ! Weight (t) | 42.0 || 28.0 |- ! Capacity (total/seated) | 118/62 || 118/62 |}

The "Mc" cars are each fitted with one S-PS58 lozenge-type pantograph.<ref name="jrr2016_summer"/>

<gallery> File:JRS EC kumoha121-14.jpg|KuMoHa 121-14 in December 2007 File:JRS EC kuha120-14.jpg|KuHa 120-14 in December 2007 </gallery>

===7200 series===

{| class="wikitable" |- ! Designation | Mc || Tc |- ! Numbering | KuMoHa 7200 || KuHa 7300 |- ! Weight (t) | 37.6 || 28.5 |- ! Capacity (total/seated) | 132/52 || 132/52 |}

The "Mc" cars are each fitted with one S-PS58 lozenge-type pantograph.<ref name="railfan664"/>

<gallery> File:JR7218-2019-1-2.jpg|7218 in January 2019 File:JR7318-2019-1-2.jpg|7318 in January 2019 </gallery>

==Interiors== Seating is arranged as a mix of transverse seating bays and longitudinal bench seats.<ref name="neko2009"/> The sets are not equipped with toilets.<ref name="jrr2016_summer"/>

<gallery> File:121 interior 20070902.jpg|An interior view in September 2007 </gallery>

==History== The 121 series sets were introduced on 23 March 1987, just nine days before JNR was privatised on 1 April, following which the 121 series fleet came under control of JR Shikoku.<ref name="railfan665"/> The sets were originally delivered with magenta "Red No. 20" bodyside stripes, but were repainted with JR Shikoku corporate light blue ("Blue No. 26") bodyside stripes during September and October 1987.<ref name="neko2009"/>

In 1992, the original pantographs were replaced with the same S-PS58 type pantographs also used on the [[JR Shikoku 7000 series]] EMUs to ensure adequate clearance through tunnels on newly electrified sections of the [[Yosan Line]].<ref name="railfan665"/>

In 2011, two sets (numbers 001 and 002) were modified for {{Lang|ja-Latn|wanman}} [[driver only operation]]. These sets were repainted with their original JNR-style magenta bodyside stripes.<ref name="jrr2016_summer"/>

<gallery> File:Kokutetu121 kokutetusyoku.jpg|121 series sets in original JNR livery, circa 1987 File:Kokutetu121 keikaisyoku.jpg|Set 009 with a front-end red warning stripe added for a short period during the 1990s File:JNR Series 121 Using Rapid Sunport.jpg|A pair of 121 series sets in May 2009 File:Series121 Adaptation of Conductorless.jpg|Modified driver-only set 001 in April 2012 </gallery>

==Refurbishment and conversion== [[File:JR-Series7200-R10.jpg|thumb|7200 series set R10 in September 2018]]

From 2016 to 2018, the entire fleet of 19 two-car trainsets underwent refurbishment, and then were reclassified as the "7200 series" (see fleet history, below). Refurbishment included replacement of the DC motors with 140 kW AC motors and VVVF control, new side windows, new "efWing" [[Carbon-fiber-reinforced polymer|CFRP]] bogies (S-DT67ef motor bogies and S-TR67ef trailer bogies), and a new livery based on the original style with a thin green line added to the magenta bodyside stripe.<ref name="railfan664">{{cite magazine|last = Yoshimoto|first = Eizaburo |script-title=ja: 7200系近郊形直流電車|trans-title= 7200 series suburban DC EMU trains |magazine = [[Japan Railfan Magazine]] |volume = 56|issue = 664 |pages = 84–87 |publisher = Koyusha Co., Ltd. |location = Japan |language = Japanese |date = August 2016}}</ref> Internally, the refurbished trains have fixed four-person seating bays on one side with longitudinal bench seating on the other.<ref name="railfan664"/>

The first trainset to be treated, set 3, departed the JR Shikoku's Tadotsu Works in February 2016,<ref name="railfan20160203">{{cite web |url=http://railf.jp/news/2016/02/03/160000.html |script-title=ja: JR四国121系第3編成が7200系となり出場|trans-title= JR Shikoku 121 series set 3 outshopped as 7200 series|date= 3 February 2016|work= Japan Railfan Magazine Online|publisher= Koyusha Co., Ltd.|location= Japan|language= Japanese|access-date= 12 May 2016}}</ref> and entered service from 13 June 2016.<ref name="railfan201606143">{{cite web |url=http://railf.jp/news/2016/06/14/180000.html |script-title=ja: JR四国7200系が営業運転を開始|trans-title= JR Shikoku 7200 series enters revenue service|date= 14 June 2016|work= Japan Railfan Magazine Online|publisher= Koyusha Co., Ltd.|location= Japan|language= Japanese|access-date= 14 June 2016}}</ref>

<gallery> File:JRshikoku 7200series 7203 S-DT67ef.jpg|An S-DT67ef motor bogie on car KuMoHa 7203 File:JRshikoku 7200series 7303 S-TR67ef.jpg|An S-TR67ef trailer bogie on car KuHa 7303 File:JRS Series7200 Inside.jpg|Inside the car File:JRS Series7200 Inside Free-space.jpg|Wheelchair space File:JRS Series7200 Cab.jpg|Driver's cab </gallery>

==Fleet history== The individual build histories for the fleet are as follows.<ref name="railfan665"/>

{| class="wikitable" |- ! Set No. !! Manufacturer !! Date delivered !! 7200 series conversion date |- | 001 || [[Hitachi]] || 17 November 1986 || 12 October 2018 |- | 002 || [[Kinki Sharyo]] || 20 November 1986 || 18 February 2019 |- | 003 || rowspan="2" | [[Kawasaki Heavy Industries]] || rowspan="2" | 13 December 1986 || 15 March 2016 |- | 004 || 9 September 2016 |- | 005 || rowspan="3" | Kinki Sharyo || rowspan="3" | 27 December 1986 || 28 March 2017 |- | 006 || 20 February 2018 |- | 007 || 7 November 2017 |- | 008 || rowspan="4" | [[Tokyu Car]] || rowspan="4" | 27 January 1987 || 5 June 2017 |- | 009 || 28 February 2017 |- | 010 || 22 August 2018 |- | 011 || 28 December 2017 |- | 012 || rowspan="3" | Hitachi || 13 January 1987 || 2 July 2018 |- | 013 || rowspan="2" | 27 January 1987 || 28 October 2016 |- | 014 || 6 December 2016 |- | 015 || rowspan="3" | Kawasaki Heavy Industries || rowspan="3" | 16 January 1987 || 13 September 2017 |- | 016 || 18 January 2017 |- | 017 || 20 July 2017 |- | 018 || rowspan="2" | Kinki Sharyo || rowspan="2" | 20 January 1987 || 11 December 2018 |- | 019 || 28 March 2018 |}

==References== {{Commons category}} {{Reflist}}

[[Category:Electric multiple units of Japan]] [[Category:Shikoku Railway Company|121 series]] [[Category:Train-related introductions in 1987]] [[Category:Train-related introductions in 2016]] [[Category:Hitachi multiple units]] [[Category:Kawasaki multiple units]] [[Category:Kinki Sharyo multiple units]] [[Category:Tokyu Car multiple units]] [[Category:1500 V DC multiple units of Japan]]