# Tobu 30000 series

The Tobu 30000 series (東武30000系, Tōbu 30000-kei) is a DC electric multiple unit (EMU) commuter train type operated by the private railway operator Tobu Railway in Japan since 1997. Initially formed as six-car and four-car sets, sets are mostly formed as permanently coupled ten-car formations since 2011.

## Formations

As of 24 January 2020 the fleet consists of one six-car and one four-car set based at Minami-Kurihashi and Kasukabe depots for Tobu Skytree Line and Tobu Nikko Line services, and 14 permanently coupled 6+4-car sets based at Shinrinkoen Depot for Tobu Tojo Line services.

### 10-car Tobu Tojo Line sets

| Car No. | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| Designation | Tc2 | M2A | M1A | T | T | M3 | T1 | M2 | M1 | Tc1 |
| Numbering | 34400 | 33400 | 32400 | 31400 | 36600 | 35600 | 34600 | 33600 | 32600 | 31600 |
* The M1 and M1A cars are each fitted with two single-arm pantographs, and the M3 cars are fitted with one.
* Cars 2, 3, 6, and 9 have wheelchair spaces.

### 6-car sets

| Designation | Tc1 | M1 | M2 | T1 | M3 | Tc2 |
| Numbering | 31600 | 32600 | 33600 | 34600 | 35600 | 36600 |
The M1 cars are fitted with two single-arm pantographs, and the M3 cars are fitted with one.

### 4-car sets

| Designation | Tc1 | M1A | M2A | Tc2 |
| Numbering | 31400 | 32400 | 33400 | 34400 |
The M1A cars are fitted with two single-arm pantographs.

## Bogies

* SS038 trailer bogie
* SS138 motored bogie

## Interior

Passenger accommodation consists of longitudinal seating throughout.$^{:43}$
The first three sets delivered, sets 31601, 31401, and 31402, had flat panels on the seat ends and no centre stanchions. Set 31403 was fitted with contoured seats, and these were fitted on all subsequent sets delivered. Sets 31607 and 31407 onward had higher light blue panels on the seat ends.
* Interior view showing seating style in early sets (car 33405)
* Interior view showing seating style in later sets (car 32612), November 2015
* Priority seating in car 32612, November 2015
* A wheelchair space in car 32612, November 2015

## History

The first set, 31601, was delivered in November 1996, with the first trains entering service on 25 March 1997. Initially used primarily on Tobu Isesaki Line services, they were introduced on through-running services to and from the Tokyu Den-en-toshi Line via the Tokyo Metro Hanzomon Line from March 2003, operating in 6+4-car formations. However, as the driving cabs between the two sets led to reduced capacity, which hampered the fleet's ability to cope with the congestion rates of the Hanzomon and Den-en-toshi lines, the 30000 series' usage on these services was reduced in late 2005. They were largely superseded by new 50050 series fixed 10-car sets from 18 March 2006.$^{:70–71}$ Sets withdrawn from Hanzomon Line through services were reallocated to services on the Isesaki, Nikko, and Utsunomiya lines.

### Transfer to Tojo Line

From January 2011, pairs of four- and six-car sets were transferred to the Tobu Tojo Line, commencing with sets 31601 and 31401. These sets entered revenue service from 13 June 2011 following modifications at Shinrinkōen Depot to form a permanently coupled 10-car set with control equipment and skirts removed from the two intermediate driving cabs. In addition, the electrical couplers from the end cars were removed.$^{:71}$
* Permanently coupled sets 31401 and 31601 undergoing driver training on the Tojo Line, April 2011
* Permanently coupled intermediate driving cabs of cars 36610 and 31410, November 2021

#### Fixed 10-car set conversion dates

| Set No. | Official modification date |
| 31601+31401 | 23 March 2011 |
| 31602+31402 | 14 January 2015 |
| 31603+31403 | 3 December 2012 |
| 31604+31404 | 22 March 2013 |
| 31605+31405 | 5 July 2012 |
| 31606+31406 | 23 January 2020 |
| 31607+31407 | 23 October 2014 |
| 31608+31408 | 26 June 2013 |
| 31609+31409 | |
| 31610+31410 | 3 October 2012 |
| 31611+31411 | 18 November 2011 |
| 31612+31412 | 8 July 2014 |
| 31613+31413 | 27 January 2014 |
| 31614+31414 | 2 September 2014 |
| 31615+31415 | 8 October 2013 |