The is a DC electric multiple unit (EMU) commuter train type operated by the private railway operator Tobu Railway in Japan since 2026. Seven ten-car sets are to be built.
Design The end cars feature a reverse slant design inspired by the Takasebune boat, with the front ends curving upwards from the lower part of the cars.
Operations In addition to operating on the Tobu Tojo Line, the 90000 series sets will also be used for through-running services over the Tokyo Metro Yurakucho Line, Tokyo Metro Fukutoshin Line, Tokyu Toyoko Line and Minatomirai Line.
Formation Sets are formed as shown below with four motored ("M") cars and six non-powered trailer ("T") cars. Car No. 10 9 8 7 6 5 4 3 2 1 Designation Tc1 M1 T1 M2 T2 T3 M3 T4 M4 Tc2 Numbering 91000 92000 93000 94000 95000 96000 97000 98000 99000 90000 Capacity (total/seated) 131/45 141/51 141/51 141/51 141/51 141/51 141/51 141/51 141/51 131/45 Weight (t) 29.3 32.3 27.5 32.3 25.0 25.7 32.3 27.5 32.4 29.2 Cars 2, 4, 7, and 9 each have one single-arm pantograph. Each car has an accessible "free space".
Interior Passenger accommodation consists of longitudinal seating throughout. Pairs of 17-inch LCD passenger information screens are installed above the doorways. LED lighting is used throughout.
History Details of the new 90000 series trains on order to replace the ageing 9000 series fleet were first announced on 26 March 2025. Tobu states that the 90000 series will consume over 40% less power than the 9000 series.
In November 2025, Tobu announced that the 90000 series would also replace 10000 and 30000 series trainsets, in addition to the 9000 series.
The first set, 91001, was delivered from Hitachi's Kasado Works plant in February 2026.
The 90000 series entered service on 26 September 2026.
Build histories The delivery dates for the fleet are as shown below. Set No. Date delivered 91001 February 2026 91002 March 2026 91003 April 2026
References