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Seibu 4000 series

🇯🇵 Japan ·built by Japan Transport Engineering Company· from 1988· electric multiple unit train type operated by Seibu Railway in Japan

🚆 multiple unit electric ✓ in service
10 photos from Wikimedia Commons · credits & licences
  1. 1. Seibu Series4000-4003: MaedaAkihiko· CC0
  2. 2. Seibu4000-untendai: ゆりのき橋 at Japanese Wikipedia· CC BY 3.0
  3. 3. Chichibu Railway 7507 & 6201 & Seibu 4000 series at Nagatoro Station: Suikotei· CC BY-SA 4.0
  4. 4. Seibu 4000 8: Tobu TJ· CC BY-SA 4.0
  5. 5. Seibu 4000 Hannō Station 2017-11-06 (39163731325): Cheng-en Cheng from Taichung City, Taiwan· CC BY-SA 2.0
  6. 6. Seibu 4000 nagatoro-express train: 特急東海· CC0
  7. 7. Seibu 4000 series 4017F Seibu-Chichibu Line 55th Anniversary Train 20241202- MG 0123: SEMISAYAMASHI· CC BY-SA 4.0
  8. 8. Seibu 4000 series 4017F Seibu-Chichibu Line 55th Anniversary Train 20250607 Koma Station: Rsa· CC BY-SA 3.0
  9. 9. Seibu 4000 series at Nagatoro Station: Suikotei· CC BY-SA 4.0
  10. 10. Seibu 4000 series at Ohanabatake Station: Suikotei· CC BY-SA 4.0
Read about it on Wikipedia ↗
Seibu 4000 series, photo 1 of 10
1/10 MaedaAkihiko· CC0

what is it?

The Seibu 4000 series (西武4000系) is an electric multiple unit (EMU) train type operated by the private railway operator Seibu Railway mainly on Seibu Chichibu Line services in Saitama Prefecture, Japan since 1988.

who runs it

Seibu Railway

base stats

  • speed 105 km/htop speed
  • power 150 kWpower output
  • built 48made in total

Bars compare against all trains: 600 km/h (maglev), 1,700 seats; power, weight and number built on a log scale up to 20 MW, 1,000 t and 20,000 built.

fun facts

  • First built 38 years ago, in 1988.
  • 20 m long: about 4 cars parked nose to tail.
  • Still in service after 38 years.

multiple unit: A self-propelled train: motors are spread under the passenger cars, so no separate locomotive.

spec sheet

built
1988
in service from
1988
status
in service
number built
48
kind
multiple unit
traction
electric
origin
🇯🇵 Japan
builders
Japan Transport Engineering Company, Tokyu Car Corporation
operators
Seibu Railway
top speed
105 km/h
power
150 kW
gauge
1,067 mm Cape gauge
electric system
1,500 V DC
formation
4 cars per trainset
length
20 m

From the Wikipedia infobox and Wikidata. Blank means the sources don't say.

Sources: Wikidata Q11251350, Wikipedia: Seibu 4000 series (CC BY-SA 4.0).Updated 2026-10-25.

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