Tobu 70000 series
70000 series set 71701 in April 2021
The interior of the 70000 series
In service	2017–present
Manufacturer	Kinki Sharyo
Built at	Higashiōsaka, Osaka
Replaced	20000 series
Constructed	2017–2020
Entered service	7 July 2017
Number built	70000 series: 126 vehicles (18 sets) (as of March 2020[update]) 70090 series: 42 vehicles (6 sets)
Formation	7 cars per trainset Mc1-M1-M2-M3-M2'-M1'-Mc2
Fleet numbers	70000 series: 71701-71718 70090 series: 71791-71796
Operators	Tobu Railway
Depots	Kasukabe
Lines served	TI Tobu Isesaki Line (70090 series only) TS Tobu Skytree Line H Tokyo Metro Hibiya Line
Specifications
Car body construction	Aluminium alloy
Train length	140.94 m (462 ft 5 in)
Car length	20,470 mm (67 ft 2 in) (end cars) 20,000 mm (65 ft 7 in) (intermediate cars)
Width	2,780 mm (9 ft 1 in)
Height	3,972 mm (13 ft 0.4 in)
Doors	4 pairs per side
Maximum speed	110 km/h (68 mph)
Weight	236.3 t (232.6 long tons; 260.5 short tons)
Traction system	Mitsubishi 2-level VVVF (Si-IGBT switching device)
Traction motors	TM-17 permanent-magnet synchronous motor
Power output	2,870 kW (205 kW x 2 per car)
Acceleration	3.3 km/(h⋅s) (2.1 mph/s)
Deceleration	3.7 km/(h⋅s) (2.3 mph/s) (service) 4.5 km/(h⋅s) (2.8 mph/s) (emergency)
Electric system(s)	1,500 V DC (overhead catenary)
Current collector(s)	Pantograph
Bogies	TRS-17M bolsterless
Safety system(s)	TSP-ATS, CS-ATC
Track gauge	1,067 mm (3 ft 6 in)

The Tobu 70000 series (東武70000系, Tōbu 70000-kei) is a Japanese DC electric multiple unit (EMU) commuter train type operated by the private railway operator Tobu Railway on Tobu Skytree Line and Tokyo Metro Hibiya Line inter-running services since 7 July 2017.

• 70000 series: sets for use on Tokyo Metro Hibiya Line through services
• 70090 series: sets for use on TH Liner reserved-seat services

The 70000 series trains are scheduled to replace the 20000 series EMUs used on Tobu Skytree Line and Tokyo Metro Hibiya Line inter-running services.^[1] Due to the effective length of the new trains which have 20 m (65 ft 7 in) long cars instead of the 18 m (59 ft 1 in) long cars of the 20000 series, the trains were formed of seven cars instead of eight cars to cope with Hibiya Line platform lengths, resulting in about a 1% reduction in capacity. A unified door arrangement with four pairs per side instead of the mixture of three and five pairs per side on the 20000 series trains allows the installation of platform edge doors on the Tokyo Metro Hibiya Line once the older train fleets have been replaced.^[1] The trains use permanent-magnet synchronous motors (PMSM), offering 25% energy savings compared to the motors used in earlier 20000 series trains.^[2]

The 70000 series trains are formed as seven-car sets as shown below, with car 1 at the northern end.^[3] Each car is motored, with only the outer axle on each bogie motored.^[3]

Car 4 has two single-arm pantographs, and cars 2 and 6 each have one.^[3]

• 
  A TRS-17M motor bogie

Internally, the trains use LED lighting throughout. Three 17-inch LCD passenger information displays are provided above each doorway.^[2] Seating consists of longitudinal bench seats throughout, with a seat width of 460 mm (18.1 in) per person (compared to 450 mm (17.7 in) per person for the 20000 series).^[2] Wheelchair spaces are provided at one end of each car.^[2]

• 
  General interior view
• 
  Priority seating
• 
  Priority seating with wheelchair space
• 
  Passenger information displays

Tobu Railway announced its plans to introduce a new fleet of trains with 20 m (65 ft 7 in) long cars and four sets of doors per side on each car in April 2014, jointly with Tokyo Metro.^[4] Details of the new 70000 series trains on order were officially announced on 17 June 2015, together with details of the Tokyo Metro 13000 series to be introduced around the same time.^[2] The entire fleet of new trains is scheduled to be delivered between fiscal 2016 and fiscal 2019,^[2] with the first set delivered from Kinki Sharyo in February 2017.^[5]

The first trains entered revenue service on 7 July 2017.^[6]

The delivery dates for the fleet are as shown below.

The 70090 series trains are used on Tobu and Tokyo Metro Hibiya Line interrunning services, and were introduced into service on 20 March 2020.^[23][24][25] They feature a different exterior color scheme than the 70000 series.^[26] The service on which these trains operate, branded TH Liner (THライナー), offers reserved seating.^[27]

The sets have seats that can be arranged longitudinally or transversely.^[27]

• 
  Interior (longitudinal arrangement)
• 
  Interior (transverse arrangement)
• 
  Priority seating
• 
  Passenger information displays

The delivery dates for the fleet are as shown below.

Wikimedia Commons has media related to Tobu 70000 series.

• Official press release (in Japanese)
• Kinki Sharyo press release (in Japanese)