Tokyu 5000 series

First introduced in 2002, the design is based on the JR East E231 series commuter train, also manufactured by Tokyu Car Corporation (now J-TREC) in Yokohama, from which all cars in this series would be produced. ==Driver's cab==

All sets use the same driver's cab, with a gray color, and a single T-shaped brake and throttle controller. There are four throttle steps, and seven brake steps. The speedometers are equipped with ATC. To the right of the speedometer is an information screen, showing the run type (local, express, etc.), and information of the individual cars. This touch screen computer can also control interior temperature and lights. File:Tokyu-5000-cab.jpg|Driver's cab of the Tokyu 5000 series ==Variants==

• 5000 series: 10-car sets used on the Tokyu Den-en-toshi Line since May 2002 • 5000 series: 8-car sets used on the Tokyu Toyoko Line • 5050 series: 8-car sets used on the Tokyu Toyoko Line • 5050-4000 series: 10-car sets used on Tokyu Toyoko Line inter-running services since September 2012 • 5080 series: 8-car (previously 6-car) sets used on the Tokyu Meguro Line since March 2003 • Y500 series: 8-car sets used on Minatomirai Line/Tokyu Toyoko Line inter-running services since February 2004 ==5000 series==

• Tokyu Den-en-toshi Line • Tokyu Toyoko Line • Minatomirai Line • Tokyo Metro Hanzomon Line • Tobu Skytree Line • Tobu Isesaki Line • Tobu Nikko Line • Tokyo Metro Fukutoshin Line • Seibu Yurakucho Line • Seibu Ikebukuro Line • Tobu Tojo Line }} • (service) • (emergency) }} }} These are ten-car sets first introduced on the Den-en-toshi Line from May 2002. These sets are distinguished by a green stripe above the doors. The 5000 series is fitted with CS-ATC and Tobu ATS (TSP) in order to run through the Tokyo Metro Hanzomon Line, and onward over the Tobu Skytree Line to Tōbu-Dōbutsu-Kōen, Tobu Isesaki Line to Kuki, and Tobu Nikko Line to Minami-Kurihashi. These sets are based at Tokyu's Nagatsuta depot, and are powered by Hitachi motors with VVVF inverters. Initially six sets (5101–5106) were built between 2002 and 2003. Set 5101 was the prototype set and has slightly different dimensions (it is narrower than the other sets and has a slightly non-standard door spacing). Between 2005 and 2008, fourteen additional sets (5107–5117 and 5120–5122) were built with two six-door cars each (cars 5 and 8); sets 5117 and 5120–5122 were fully new built, while car 4 of sets 5107–5116 were surplus cars from sets 5102–5106, as two of their cars (5 and 8) were replaced with new six-door cars as well. Set 5122 never entered service on the Den-en-toshi Line. In early 2009, two additional sets (5118 and 5119) were built as 9-car sets (car 4 was missing, and cars 5 and 8 were six-door cars) but these also never entered into service. Between 2009 and 2010, a third six-door car (car 4) was added to sets 5104–5117 and 5120 (total 15 sets): three cars were new built and 12 were taken from other sets (two cars each from sets 5102, 5103, 5118, 5119, 5121, and 5122). Of the 15 surplus four-door cars created, four were used to return sets 5102 and 5103 to fully four-door sets, six were inserted into sets 5118, 5119, 5121, and 5122, and the remaining five cars were used in 5050 series sets 5170–5172. Meanwhile, sets 5118, 5119, 5121, and 5122 were reformed as eight car sets and transferred to the Tōyoko Line. As mentioned earlier, nine-car sets 5118 and 5119 each had of their two six-door cars removed and replaced with two four-door surplus cars, and ten-car sets 5121 and 5122 each had two six-door cars replaced with a single four-door surplus car. In addition, a motored four-door car from each set was removed, and used in 5050 series sets 5169 and 5172–5174. A total of 45 new four-door cars were built from December 2015 to replace the three six-door cars in sets 5104–5117 and 5120 to ensure uniform door-spacing ahead of the introduction of platform edge doors at Den-en-toshi Line stations from 2016. All six-door cars were replaced by the end of 2017. The new cars added incorporate a number of interior design improvements, including higher seat backs and headrests on some seats. Operations Formations The sets are formed as follows. Livery variations Green frog Toyoko Line eight-car set 5122 received an all-over green vinyl wrapping livery in September 2017 to mark the 90th anniversary of the opening of the Toyoko Line and recreating the appearance of the original 5000 series EMUs nicknamed "green frog" which formerly operated on the line. It was originally scheduled to carry this livery until the end of August 2018, before Tokyu announced in September 2019 that the livery would be carried indefinitely. ==5050 series==

• (end cars) • (intermediate cars) }} • Body width: • Total width: while set 5156 was transferred to Yokohama Minatomirai Railway in 2018 and renumbered Y517 to replace set Y516 damaged in the same accident. New build sets 5177 and 5178 were delivered from J-TREC in 2016 and 2019 respectively as replacement trains. In 2020, set 5173 was reformed as a 10-car set and renumbered as set 4111. Furthermore, in 2022, set 5166 was reformed as a 10-car set and features two "Q Seat" cars (numbered cars 4 and 5 within the set) in preparation for "Q Seat" services on the Toyoko Line. The set was renumbered to 4112. Following the completion of newly formed 4112, it was announced that three more sets (sets 5167–5169) will be reformed into 10-car trainsets for service on the Sotetsu-Tokyu Link. Once reformed, they will be numbered 4113–4115 respectively. The first "Q Seat" cars entered service on the Toyoko Line on 24 October 2022; The car, numbered 5576, is part of set 5176. File:Tokyu 5050 kei 5576 sustina vehicles toyoko line.JPG|Sustina car 5576 in September 2013 File:Tokyu 5050 kei 5576 sustina vehicles interior.JPG|Interior of the sustina car File:Tokyu 5050 kei 5576 sustina vehicles.JPG|Manufacturer's plate Refurbishment On 8 May 2025, Tokyu Corporation announced its plans to refurbish twenty-three 5050 series sets. Refurbished sets will carry a new livery and a redesigned interior based on that of the 2020 series, with new walls, seats, and flooring as well as additional wheelchair spaces. The first refurbished 5050 series set is scheduled to return to service in the final quarter of 2025. ==5050-4000 series==

• (end cars) • (intermediate cars) }} • Body width: • Total width: Operations Formations The ten-car sets are formed as follows. • The M1 and M1' cars each have two single-arm pantographs, and the M car is fitted with one. Interior File:Tokyu 5050-4000 4008 interior 20130725.JPG|Interior view of car 4008 in July 2013 File:Tokyu 5050-4000 4008 seat 20130725.JPG|7-person bench seating in July 2013 File:Tokyu 5050-4000 4008 priority seat 20130725.JPG|Priority seating in car 4008 in July 2013 File:Tokyu 5050-4000 4908 wheelchair space 20130725.JPG|Wheelchair space in car 4908 File:Tokyu 4601 interior Kawagoeshi 20150611.JPG|The interior of car 4601 (formerly 5000 series car 5918) with original blue seating moquette File:Tokyu 5050kei4000bandai LCD.jpg|LCD passenger information screens above the doorways in December 2011 Shibuya Hikarie Set number 4110 was delivered in April 2013 in a special Shibuya Hikarie body graphics and with modified interior to mark the first anniversary of Tokyu's "Shibuya Hikarie" development located above the newly expanded underground Shibuya Station. This trainset entered revenue service on 26 April 2013. It is the first 5050 series train to feature LED interior lighting, and has higher backed seating than regular trains, with grey seat backs in cars 1, 3, 8, and 10, brown seat backs in cars 2, 4, 6, and 9, and blue seat backs in cars 5 and 7. The train is equipped experimentally with free WiFi. These cars were formed into a 10-car set with the inclusion of intermediate motor car 4601, renumbered from former 5050 series trailer car 5469, which was itself previously renumbered from motor car 5918. The second 10-car set was delivered from Tokyu Car in June 2011. Set 4101 entered revenue service on the Tokyu Toyoko Line from 9 September 2011, reduced to an 8-car formation. From 10 September 2012, 10-car 5050-4000 series sets entered revenue service on the Seibu Ikebukuro Line (and Seibu Yurakucho Line) and Tobu Tojo Line, with inter-running through to the Tokyo Metro Fukutoshin Line and Tokyo Metro Yurakucho Line. In July 2020, a former 8-car set built in 2010 (set 5173) was joined with two new cars (built in 2019) and reformed as 10-car set 4111. In July 2022, another former 8-car set 5166 was reformed into 10-car set 4112 with two new “Q Seat” cars in preparation for reserved seating services on the Toyoko Line in 2023. As of 1 August 2022, the new Q Seat cars feature a livery very similar to those used on the Oimachi Line, however they are painted in red in contrast to orange. Two months later, three more sets (5167, 5168, and 5169) were announced to be lengthened into 10-car trainsets in preparation for through-running service on the Sotetsu line. Once completed, they will be renumbered to sets 4113, 4114, and 4115 respectively. The first "Q Seat" cars entered service on the Toyoko Line on 24 October 2022; however "Q Seat" services only began on 10 August 2023. File:Tokyu_Series5050_4412-4512_Q-SEAT.jpg|"Q Seat" cars on the Toyoko Line in April 2023 Livery variations Tōkaidō–San'yō Shinkansen livery On 8 May 2024, Tokyu announced that as part of the "enjoy! West" promotion with the cooperation of JR Central, one 5050-4000 series set would receive a special wrapping livery based on the livery used by N700A series trains operated on the Tōkaidō and San'yō Shinkansen lines with the exterior painted white and two blue stripes added beneath the windows. On 14 May 2024, set 4105 returned to service with this livery. ==5080 series==

• (end cars) • (intermediate cars) }} • Body width: • Total width: }} • (service) • (emergency) }} }} Ten six-car sets were introduced on the Meguro Line from March 2003. These sets are distinguished from the others by a dark blue stripe above the doors. Unlike the other variants, they are powered by Toshiba equipment, rather than Hitachi. The 5080 series is fitted with CS-ATC, ATO and TASC for use on the Tokyo Metro Namboku Line, Saitama Rapid Railway Line, and Toei Mita Line. These sets are based at Motosumiyoshi Depot. Two additional cars are expected to be inserted into each set for the introduction of through services to the Sōtetsu Shin-Yokohama Line. The first ten of these new cars, of which two are former 6000 series cars, were delivered in October 2021. all sets have been lengthened to eight cars. Operations Formation Meguro Line eight-car sets feature “8 Cars” stickers on cars 1 and 8 to distinguish them from the original six car trainsets. They are formed as follows, with four motored (M) cars and four trailer (T) cars. Car 1 is at the Meguro end. The M1 cars (7) are fitted with two single-arm pantographs, and the M cars (2) and (4) are fitted with one. Original 6-car set formation Meguro Line six-car sets were originally formed as follows, with three motored (M) cars and three trailer (T) cars. Car 1 was at the Meguro end. The M1 cars (5) was fitted with two single-arm pantographs, and the M cars (2) were fitted with one. Interior File:Inside-Tokyu5181.jpg|5080 series interior File:Tokyu5185-Courtesy seat.jpg|Priority seating File:Inside-Tokyu5181-LED.jpg|LED passenger information display in car 5181 File:Inside-Tokyu5185-LCD.jpg|LCD passenger information display in car 5185 ==Y500 series==

• (end cars) • (intermediate cars) }} • Body width: • Total width: and a replacement set (Y517, former Tokyu 5050 series set 5156) was transferred to Yokohama Minatomirai Railway. Set Y517 entered service with the operator on 24 March 2018. Operations Formation Yokohama Minatomirai Railway Y500 series sets are formed as follows. The M1 cars (3 and 7) are each fitted with two single-arm pantographs. Interior File:Yokohama-Minatomirai-Y500-interior.jpg|Y500 series interior ==Accidents==

On the evening of 5 October 2025, the rear car of 5000 series set 5101 collided with an oncoming Shibuya-bound train—Tokyu 2020 series set 2035—as it was entering a layover track near Kajigaya Station on the Tokyu Den-en-toshi Line, causing car 5101 to derail. No injuries were reported, but the accident resulted in a suspension of train service between Shibuya and Kajigaya until around midnight on 7 October. ==References==