Keio 2000 series

The Keio 2000 series is an electric multiple unit train type operated by the private railway operator Keio Corporation in Japan since 2026.

Design

The 2000 series trains adopt a rounded front end as well as a circular motif on the side exterior that give a sense of gentleness, and are intended to be passenger-friendly for various generations.
Internally, a wide open "free space" is included near one end of car 5 to provide improved accessibility to strollers and wheelchairs, a first for Keio. This area also features enlarged windows to keep children occupied throughout train journeys. Every car has one priority/accessible "free space" and be equipped with two "nanoe X" purifiers as well as four internal surveillance cameras with real-time transmission abilities.

History

Details of the 2000 series were first announced in May 2024. This first set is scheduled to be put into service in early 2026, with a total of four sets in 10-car formations due to be manufactured by J-TREC by March 2027. These trains will use variable-frequency drive inverters with silicon carbide components, which brings down energy consumption by 20% compared to older 7000 series trains.
Following a vote held between 7 May and 10 June 2025 to determine the branding used for car 5's "free space", Keio announced on 30 September that the space would receive the name "Hidamari Space".
The first set, 2701, was delivered from the J-TREC factory at Yokohama in October 2025.
The 2000 series entered revenue service on 31 January 2026.