# Tokyu 2020 series

The Tokyu 2020 series (東急2020系, Tōkyū 2020-kei) is an electric multiple unit (EMU) commuter train type built by J-TREC and used by the Japanese private railway operator Tokyu Corporation in the Tokyo area since March 2018. The 2020 series is used primarily on the Tokyu Den-en-toshi Line while its derivatives, the 3020 series (3020系, 3020-kei) and the 6020 series (6020系, 6020-kei), are used mainly on the Tokyu Meguro Line and Tokyu Oimachi Line respectively.

## Design

The 2020 series trains were built by Japan Transport Engineering Company (J-TREC) as part of its "Sustina S24 Series" family of 20-metre long four-door stainless steel cars. The styling of the trains was overseen by Tanseisha, a company involved in designing commercial buildings along the Tokyu route.
The classification "2020 series" for the trains was chosen to mark the year 2020 in which the Tokyo Olympics were scheduled to be held and in which Tokyu celebrated its 100th anniversary.

## Variants

* 2020 series: 10-car sets used on the Tokyu Den-en-toshi Line since March 2018
* 3020 series: 8-car (originally 6-car) sets used on the Tokyu Meguro Line since January 2020
* 6020 series: 7-car sets used on the Tokyu Oimachi Line since March 2018

## 2020 series

Details of the 2020 series were officially announced on 17 March 2017. Three ten-car sets (30 vehicles) are scheduled to be delivered during fiscal 2017, entering service in spring 2018, with further sets introduced over the following years. The first trainset, 2121, was delivered from the J-TREC factory in Yokohama in late November 2017, and shown off to the media on 30 November 2017. The second trainset, 2122, was delivered from the J-TREC factory in Niitsu, Niigata, in February 2018.
The first sets entered service on 28 March 2018.

### Interior

Passenger accommodation consists of high-back longitudinal seats. In addition to passenger information screens placed above the doorways and car ends, LCD screens are also located above the seats. Security cameras are installed in the cars.
* 2020 series interior view

### Formation

The trains are formed as follows, with five motored ("M") cars and five non-powered trailer ("T") cars, and car 1 at the Shibuya end.
| | ← Shibuya Chūō-rinkan → | ← Shibuya Chūō-rinkan → | ← Shibuya Chūō-rinkan → | ← Shibuya Chūō-rinkan → | ← Shibuya Chūō-rinkan → | ← Shibuya Chūō-rinkan → | ← Shibuya Chūō-rinkan → | ← Shibuya Chūō-rinkan → | ← Shibuya Chūō-rinkan → | ← Shibuya Chūō-rinkan → |
| Car No. | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| Designation | KuHa 2120 (Tc2) | DeHa 2220 (M2) | DeHa 2320 (M1) | SaHa 2420 (T3) | SaHa 2520 (T2) | DeHa 2620 (M3) | SaHa 2720 (T1) | DeHa 2820 (M2) | DeHa 2920 (M1) | KuHa 2020 (Tc1) |
| Weight (t) | 31.5 | 33.5 | 33.5 | 27.8 | 27.5 | 32.0 | 27.5 | 33.5 | 33.5 | 31.4 |
| Capacity (total/seated) | 143/45 | 155/48 | 155/51 | 155/51 | 155/51 | 155/51 | 155/51 | 155/51 | 155/51 | 143/45 |
Cars 3 and 9 each have two single-arm pantographs, and car 6 has one.

### Build histories

The manufacturers and delivery dates for the fleet are as shown below.
| Set No. | Manufacturer | Date delivered | Notes |
| 2121 | J-TREC, Yokohama | November 2017 | |
| 2122 | J-TREC, Niitsu | February 2018 | |
| 2123 | J-TREC, Niitsu | February 2018 | |
| 2124 | J-TREC, Niitsu | 6 June 2018 | |
| 2125 | J-TREC, Niitsu | 27 June 2018 | |
| 2126 | J-TREC, Niitsu | 30 October 2018 | Car 3 is a former 6020 series car. |
| 2127 | J-TREC, Niitsu | 5 December 2018 | Car 3 is a former 6020 series car. |
| 2128 | J-TREC, Niitsu | 6 March 2019 | |
| 2129 | J-TREC, Niitsu | 27 March 2019 | |
| 2130 | J-TREC, Niitsu | 21 August 2019 | |
| 2131 | J-TREC, Yokohama | 31 October 2019 | |
| 2132 | J-TREC, Niitsu | 17 January 2020 | |
| 2133 | J-TREC, Niitsu | 14 February 2020 | |
| 2134 | J-TREC, Niitsu | 4 March 2020 | |
| 2135 | J-TREC, Niitsu | 25 March 2020 | |
| 2136 | J-TREC, Niitsu | 15 April 2020 | |
| 2137 | J-TREC, Niitsu | 13 May 2020 | |
| 2138 | J-TREC, Yokohama | 17 September 2020 | |
| 2139 | J-TREC, Niitsu | 6 August 2020 | |
| 2140 | J-TREC, Niitsu | 2 September 2020 | |
| 2141 | J-TREC, Niitsu | 9 December 2020 | |
| 2142 | J-TREC, Niitsu | 7 January 2021 | |
| 2143 | J-TREC, Niitsu | 18 March 2021 | |
| 2144 | J-TREC, Niitsu | 15 April 2021 | |
| 2145 | J-TREC, Niitsu | 23 May 2021 | |
| 2146 | J-TREC, Niitsu | 11 June 2021 | |
| 2147 | J-TREC, Niitsu | 15 July 2021 | |
| 2148 | J-TREC, Niitsu | 26 August 2021 | |
| 2149 | J-TREC, Niitsu | 22 December 2021 |
| 2150 | J-TREC, Niitsu | May 2022 | Final set |

## 3020 series

On 26 March 2019, Tokyu Corporation announced the introduction of new 3020 series trains on their Meguro Line. The first set of eight cars was delivered in April 2019. A second set of eight cars was transferred from J-TREC in Yokohama to Nagatsuta in May 2019. Trial runs on the Den-en-toshi Line began in June 2019.
The first 3020 series set entered revenue service on 22 November 2019.
Set 3123 was the first set to be lengthened to an eight-car formation, having re-entered service in April 2022. Another set 3121 was lengthened to an eight-car formation and re-entered service mid July 2022. Finally on 13 August 2022, the remaining set 3122 was sent to Nagatsuta depot where it was lengthened to an eight-car formation.
Service commenced on the Tōkyū Shin-Yokohama Line in March 2023. As of June 2023, the 3020 series lacks equipment needed in order to through run on the Sōtetsu Shin-Yokohama Line and associated through services. Tokyu plans to install the required equipment to enable Sotetsu through service in the near future. Set 3121 had officially entered service along the Sotetsu network on September 26, 2023, over a half year later of the opening of the Sōtetsu-Tokyu Link Line.

### Interior

Passenger accommodation consists of high-back seating. The trains are also fitted with security cameras and air purifiers.
* Interior view
* Wheelchair space (right)
* Passenger information displays

### Formation

The trains are operated as eight-car sets. They were originally built as such, but were initially operated as six-car sets, with two cars per set stored until 2022, when platform doors were extended to fit 8-car trains as part of Tokyu Corporation's strategy to cope with high demand on the Meguro Line and for the opening of the Sōtetsu Tōkyū Link Line. All three trainsets are distinguished with an "8-Cars" sticker located on the front window of the first and last cars, and are formed as follows:
| | ← Meguro Hiyoshi → | ← Meguro Hiyoshi → | ← Meguro Hiyoshi → | ← Meguro Hiyoshi → | ← Meguro Hiyoshi → | ← Meguro Hiyoshi → | ← Meguro Hiyoshi → | ← Meguro Hiyoshi → |
| Car No. | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| Designation | KuHa 3120 (Tc2) | DeHa 3220 (M2B) | DeHa 3320 (M1B) | SaHa 3420 (T2) | SaHa 3520 (T1) | DeHa 3620 (M2A) | DeHa 3720 (M1A) | KuHa 3820 (Tc1) |
| Weight (t) | 31.5 | 33.3 | 33.3 | 27.3 | 27.3 | 33.3 | 33.3 | 31.9 |
| Capacity (total/seated) | 143/45 | 155/48 | 155/51 | 155/51 | 155/51 | 155/51 | 155/51 | 143/45 |
| Numbering | 3121 : 3123 | 3221 : 3223 | 3321 : 3323 | 3421 : 3423 | 3521 : 3523 | 3621 : 3623 | 3721 : 3723 | 3821 : 3823 |
The "M1B" and "M1A" cars are each fitted with two single-arm pantographs.

#### Initial 6-car set formation

The original six-car formation was as follows:
| | ← Meguro Hiyoshi → | ← Meguro Hiyoshi → | ← Meguro Hiyoshi → | ← Meguro Hiyoshi → | ← Meguro Hiyoshi → | ← Meguro Hiyoshi → |
| Car No. | 1 | 2 | 3 | 4 | 5 | 6 |
| Designation | KuHa 3120 (Tc2) | DeHa 3220 (M2B) | DeHa 3320 (M1B) | DeHa 3620 (M2A) | DeHa 3720 (M1A) | KuHa 3820 (Tc1) |
| Weight (t) | 31.5 | 33.3 | 33.3 | 33.3 | 33.3 | 31.9 |
| Capacity (total/seated) | 143/45 | 155/48 | 155/51 | 155/51 | 155/51 | 143/45 |
| Numbering | 3121 : 3123 | 3221 : 3223 | 3321 : 3323 | 3621 : 3623 | 3721 : 3723 | 3821 : 3823 |
The "M1B" and "M1A" cars were each fitted with two single-arm pantographs.
* 6-car set on the Toei Mita Line in June 2021

### Build histories

The manufacturers and delivery dates for the fleet are as shown below.
| Set No. | Manufacturer | Date delivered |
| 3121 | J-TREC, Yokohama | April 2019 |
| 3122 | J-TREC, Yokohama | May 2019 |
| 3123 | J-TREC, Yokohama | July 2019 |

## 6020 series

Details of the 6020 series were officially announced on 12 October 2017. The first set was delivered from the J-TREC factory in Yokohama in December 2017, followed by a second in January 2018.
The first sets entered service on 28 March 2018.
In both sets, car 3 was replaced by a new-build "Q Seat" car built in October 2018. The outgoing cars were subsequently used in 2020 series sets 2126 and 2127. The Q Seat cars are usually arranged in longitudinal mode, but on specific evening express trains from Ōimachi to Nagatsuta, they are arranged in transverse mode and can be used only with a reservation by paying a small surcharge.
* Q Seat car

### 5-car trains

On 28 February 2025, Tokyu announced its plans to procure eighteen 5-car 6020 series sets to replace all 9000 and 9020 series sets on local Ōimachi Line services. The first such set, 6151, was delivered to the Nagatsuta depot in March of that year.

### Interior

Passenger accommodation consists of high-back longitudinal seating throughout, except car 3, which is a "Q Seat" car that features rotating pairs of seats that can be arranged in longitudinal mode or transverse mode. Security cameras are installed in the cars.
* Interior view
* Interior view of a Q Seat car
* Rotating seat

### Formation

The 7-car sets are formed as follows:
| | ← Ōimachi Mizonokuchi, Nagatsuta → | ← Ōimachi Mizonokuchi, Nagatsuta → | ← Ōimachi Mizonokuchi, Nagatsuta → | ← Ōimachi Mizonokuchi, Nagatsuta → | ← Ōimachi Mizonokuchi, Nagatsuta → | ← Ōimachi Mizonokuchi, Nagatsuta → | ← Ōimachi Mizonokuchi, Nagatsuta → |
| Car No. | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
| Designation | KuHa 6120 (Tc2) | DeHa 6220 (M2B) | DeHa 6320 (M1L) | SaHa 6420 (T1) | DeHa 6520 (M2A) | DeHa 6620 (M1A) | KuHa 6720 (Tc1) |
Cars 3 and 6 are each fitted with two single-arm pantographs.

#### As built

The 7-car sets were originally formed as follows:
| | ← Ōimachi Mizonokuchi, Nagatsuta → | ← Ōimachi Mizonokuchi, Nagatsuta → | ← Ōimachi Mizonokuchi, Nagatsuta → | ← Ōimachi Mizonokuchi, Nagatsuta → | ← Ōimachi Mizonokuchi, Nagatsuta → | ← Ōimachi Mizonokuchi, Nagatsuta → | ← Ōimachi Mizonokuchi, Nagatsuta → |
| Car No. | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
| Designation | KuHa 6120 (Tc2) | DeHa 6220 (M2B) | DeHa 6320 (M1B) | SaHa 6420 (T1) | DeHa 6520 (M2A) | DeHa 6620 (M1A) | KuHa 6720 (Tc1) |
| Weight (t) | 31.2 | 33.3 | 33.3 | 27.3 | 33.3 | 33.3 | 31.4 |
| Capacity (total/seated) | 143/45 | 155/48 | 155/51 | 155/51 | 155/51 | 155/51 | 143/45 |
Cars 3 and 6 were each fitted with two single-arm pantographs.

### Build histories

The manufacturers and delivery dates for the fleet are as shown below.
| Set No. | Manufacturer | Date delivered |
| 6121 | J-TREC, Yokohama | December 2017 |
| 6122 | J-TREC, Yokohama | January 2018 |
| 6151 | | March 2025 |

## Special liveries

On 10 April 2022, 3020 series set 3121 received a special livery to commemorate the 100th anniversary of Tokyu Corporation's founding. A 2020 series set is also due to receive the commemorative livery from 17 April.
On 17 April 2023, 3020 series set 3122 received a colorful rainbow Sustainable Development Goals (SDGs) livery.