E231 series EMU
E125107
The E231 series EMU is a widely used Japanese commuter train type operated by JR East, known for its high-capacity, rapid-transit service in the Greater Tokyo area.
All labels observed (12)
| Label | Occurrences |
|---|---|
| E231 series EMU canonical | 4 |
| E231 series | 2 |
| E231-500 series | 2 |
| JR East E series EMU | 2 |
| E231-0 series | 1 |
| E231-800 series | 1 |
| E231-900 series | 1 |
| E231系電車 | 1 |
| JR East E-series EMU | 1 |
| JR East E231-0 series EMU | 1 |
| JR East E231-900 series EMU | 1 |
| Yamanote Line (E231-500, until replacement by E235) | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T1081020 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: E231 series EMU Context triple: [JR Shonan–Shinjuku Line, primaryRollingStock, E231 series EMU]
-
A.
NS 88 series
The NS 88 series is a type of electric multiple-unit rolling stock used on the Santiago Metro system in Chile.
-
B.
Sanyo Shinkansen
Sanyo Shinkansen is a high-speed railway line in Japan that connects Osaka with western Honshu cities such as Hiroshima and Fukuoka as part of the Shinkansen network.
-
C.
Kinkisharyo light rail vehicles
Kinkisharyo light rail vehicles are modern electric multiple-unit trains manufactured by the Japanese company Kinki Sharyo, widely used in North American light rail systems for urban passenger transit.
-
D.
Class 397 Civity EMU
The Class 397 Civity EMU is a modern high-speed electric multiple unit built by CAF for intercity services in the UK, notably on routes linking north of England cities with Scotland.
-
E.
Z 20500 EMU
The Z 20500 EMU is a class of double-deck electric multiple unit trains operated by SNCF in the Paris suburban network, notably on lines such as the RER.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: E231 series EMU Target entity description: The E231 series EMU is a widely used Japanese commuter train type operated by JR East, known for its high-capacity, rapid-transit service in the Greater Tokyo area.
-
A.
NS 88 series
The NS 88 series is a type of electric multiple-unit rolling stock used on the Santiago Metro system in Chile.
-
B.
Sanyo Shinkansen
Sanyo Shinkansen is a high-speed railway line in Japan that connects Osaka with western Honshu cities such as Hiroshima and Fukuoka as part of the Shinkansen network.
-
C.
Kinkisharyo light rail vehicles
Kinkisharyo light rail vehicles are modern electric multiple-unit trains manufactured by the Japanese company Kinki Sharyo, widely used in North American light rail systems for urban passenger transit.
-
D.
Class 397 Civity EMU
The Class 397 Civity EMU is a modern high-speed electric multiple unit built by CAF for intercity services in the UK, notably on routes linking north of England cities with Scotland.
-
E.
Z 20500 EMU
The Z 20500 EMU is a class of double-deck electric multiple unit trains operated by SNCF in the Paris suburban network, notably on lines such as the RER.
- F. None of above. chosen
Statements (51)
| Predicate | Object |
|---|---|
| instanceOf |
commuter train
ⓘ
electric multiple unit ⓘ |
| brakeType |
electro-pneumatic brake
ⓘ
regenerative brake ⓘ |
| carBodyMaterial | stainless steel ⓘ |
| carLength | 20 m class ⓘ |
| collectionMethod | pantograph ⓘ |
| controlMethod | VVVF inverter control ⓘ |
| country | Japan ⓘ |
| designedBy |
East Japan Railway Company
ⓘ
surface form:
JR East
|
| designedFor | high-capacity urban commuting ⓘ |
| doorConfiguration | 4 pairs per side per car (most variants) ⓘ |
| doorType | sliding doors ⓘ |
| electrificationSystem | 1,500 V DC overhead catenary ⓘ |
| enteredService | 2000 ⓘ |
| family |
E231 series EMU
self-linksurface differs
ⓘ
surface form:
JR East E-series EMU
|
| gauge | 1,067 mm ⓘ |
| hasFeature |
LCD passenger information displays (in many sets)
ⓘ
longitudinal bench seating in most cars ⓘ priority seating areas ⓘ wheelchair spaces ⓘ |
| hasVariant |
E231 series EMU
self-linksurface differs
ⓘ
surface form:
E231-0 series
E231 series EMU self-linksurface differs ⓘ
surface form:
E231-500 series
E231 series EMU self-linksurface differs ⓘ
surface form:
E231-800 series
E231 series EMU self-linksurface differs ⓘ
surface form:
E231-900 series
|
| introduced | 2000 ⓘ |
| manufacturer |
J-TREC
ⓘ
JR East Niitsu Rolling Stock Plant ⓘ Tokyu Car Corporation ⓘ |
| operator |
East Japan Railway Company
ⓘ
East Japan Railway Company ⓘ
surface form:
JR East
|
| operatorType | passenger railway ⓘ |
| primaryUse |
commuter services
ⓘ
rapid-transit services ⓘ |
| region | Honshu ⓘ |
| serviceArea |
Tokyo metropolitan area
ⓘ
surface form:
Greater Tokyo area
Kantō region ⓘ |
| serviceType | suburban commuter ⓘ |
| successor |
E233 series EMU
ⓘ
E235 series EMU ⓘ
surface form:
E235 series EMU (on some lines)
|
| trackGaugeType | narrow gauge ⓘ |
| usedOnLine |
Chūō-Sōbu Line
ⓘ
Jōban Line ⓘ Keihin-Tōhoku–Negishi Line (some formations) ⓘ Musashino Line ⓘ JR Shonan–Shinjuku Line ⓘ
surface form:
Shōnan-Shinjuku Line
Sōbu Line Rapid ⓘ
surface form:
Sōbu Rapid Line
Takasaki Line ⓘ Tōkaidō Main Line ⓘ Utsunomiya Line ⓘ E231 series EMU self-linksurface differs ⓘ
surface form:
Yamanote Line (E231-500, until replacement by E235)
|
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: E231 series EMU Description of subject: The E231 series EMU is a widely used Japanese commuter train type operated by JR East, known for its high-capacity, rapid-transit service in the Greater Tokyo area.
Referenced by (18)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
JR East E-series EMU
this entity surface form:
E231-0 series
this entity surface form:
E231-500 series
this entity surface form:
E231-800 series
this entity surface form:
E231-900 series
this entity surface form:
Yamanote Line (E231-500, until replacement by E235)
this entity surface form:
JR East E series EMU
this entity surface form:
JR East E series EMU
this entity surface form:
E231-500 series
this entity surface form:
E231 series
this entity surface form:
JR East E231-0 series EMU
this entity surface form:
JR East E231-900 series EMU
this entity surface form:
E231 series