E723 series
Japanese electric multiple unit train type
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The E723 series (E723系, E723-kei) is an electric multiple unit train type on order by East Japan Railway Company (JR East) for use on Ōu Main Line services between Yamagata and Shinjo from autumn 2026. Eleven two-car sets are to be built.[1]
In servicePlanned for 2026
ManufacturerKawasaki Railcar Manufacturing
Number under construction18 vehicles (9 sets)
Number built4 vehicles (2 sets)
| E723 series | |
|---|---|
| In service | Planned for 2026 |
| Manufacturer | Kawasaki Railcar Manufacturing |
| Number under construction | 18 vehicles (9 sets) |
| Number built | 4 vehicles (2 sets) |
| Formation | 2 cars per trainset |
| Fleet numbers | B-1 – B-11 |
| Operator |  JR East |
| Line served | ■ Ōu Main Line |
| Specifications | |
| Car body construction | Stainless steel |
| Car length | 19,500 mm (64 ft 0 in) |
| Width | 2,800 mm (9 ft 2 in) |
| Doors | 3 per side |
| Traction system | Variable-frequency[1] |
| Track gauge | 1,435 mm (4 ft 8+1⁄2 in) |
| Notes/references | |
| Specifications:[2] | |
E723-5000 series
The E723-5000 series was developed for use on the standard-gauge section of the Ōu Main Line. The first two sets, B-1 and B-2, were delivered from the Kawasaki Railcar Manufacturing Hyogo plant in April 2026.[3]
Interior
Passenger accommodation will consist of longitudinal seating throughout. Both cars will have an accessible "free space".[4]