Osaka Metro 20 series
E366440
The Osaka Metro 20 series is a type of electric multiple unit train used on Osaka's subway network, known for its stainless-steel construction and service on several key lines.
All labels observed (4)
| Label | Occurrences |
|---|---|
| Osaka Metro 20 series canonical | 2 |
| Osaka Metro 20 series family | 1 |
| Osaka Metro 21 series trains | 1 |
| Osaka Municipal Subway 20 series | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T3499099 — 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: Osaka Metro 20 series Context triple: [Chuo Line (Osaka Metro), hasRollingStock, Osaka Metro 20 series]
-
A.
Osaka Metro 23 series
The Osaka Metro 23 series is a type of electric multiple unit train operated on Osaka’s subway network, specifically serving the Yotsubashi Line.
-
B.
Osaka Metro 25 series
The Osaka Metro 25 series is a type of electric multiple unit train used for passenger services on Osaka’s subway network.
-
C.
Osaka Metro 30000 series
The Osaka Metro 30000 series is a modern electric multiple unit train type operated by Osaka Metro, featuring air conditioning, energy-efficient systems, and improved passenger comfort for urban subway services.
-
D.
Osaka Metro 22 series trains
The Osaka Metro 22 series trains are electric multiple units operating on Osaka’s subway network, designed for efficient, high-capacity urban passenger service.
-
E.
Osaka Metro 30 series trains
The Osaka Metro 30 series trains are electric multiple units operating on Osaka’s subway network, known for their stainless-steel bodies and use on busy urban lines such as the Tanimachi Line.
- 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: Osaka Metro 20 series Target entity description: The Osaka Metro 20 series is a type of electric multiple unit train used on Osaka's subway network, known for its stainless-steel construction and service on several key lines.
-
A.
Osaka Metro 23 series
The Osaka Metro 23 series is a type of electric multiple unit train operated on Osaka’s subway network, specifically serving the Yotsubashi Line.
-
B.
Osaka Metro 25 series
The Osaka Metro 25 series is a type of electric multiple unit train used for passenger services on Osaka’s subway network.
-
C.
Osaka Metro 30000 series
The Osaka Metro 30000 series is a modern electric multiple unit train type operated by Osaka Metro, featuring air conditioning, energy-efficient systems, and improved passenger comfort for urban subway services.
-
D.
Osaka Metro 22 series trains
The Osaka Metro 22 series trains are electric multiple units operating on Osaka’s subway network, designed for efficient, high-capacity urban passenger service.
-
E.
Osaka Metro 30 series trains
The Osaka Metro 30 series trains are electric multiple units operating on Osaka’s subway network, known for their stainless-steel bodies and use on busy urban lines such as the Tanimachi Line.
- F. None of above. chosen
Statements (43)
| Predicate | Object |
|---|---|
| instanceOf |
commuter train
ⓘ
electric multiple unit ⓘ |
| brakeType |
electro-pneumatic brake
ⓘ
regenerative brake ⓘ |
| carbodyMaterial | stainless steel ⓘ |
| carConstruction | lightweight stainless-steel body ⓘ |
| collectionMethod | pantograph ⓘ |
| country | Japan ⓘ |
| couplingType | automatic coupler ⓘ |
| designedBy |
Osaka Metro
ⓘ
surface form:
Osaka Municipal Transportation Bureau
|
| designedFor |
high-frequency metro operation
ⓘ
urban commuter services ⓘ |
| designedToReplace | older Osaka subway rolling stock ⓘ |
| doorConfiguration | 4 pairs per side per car (typical) ⓘ |
| doorType | sliding doors ⓘ |
| electricSystem | 1,500 V DC overhead catenary ⓘ |
| enteredService | 1984 ⓘ |
| floorType | high-floor ⓘ |
| formation |
6-car sets
ⓘ
8-car sets ⓘ |
| formerOperator |
Osaka Metro
ⓘ
surface form:
Osaka Municipal Transportation Bureau
|
| hasCarbody | stainless-steel double-skin structure ⓘ |
| introduced | 1984 ⓘ |
| livery | Osaka Metro standard stainless-steel with colored line stripes ⓘ |
| operator | Osaka Metro ⓘ |
| operatorStyle | one-man operation capable (on some sets) ⓘ |
| passengerService | all-stations stopping services ⓘ |
| powerType | electric ⓘ |
| primaryCityServed | Osaka ⓘ |
| railwayNetwork | Osaka Metro ⓘ |
| region | Kansai region ⓘ |
| safetySystem |
automatic train control (ATC) compatible
ⓘ
automatic train stop (ATS) compatible ⓘ |
| serviceStatus |
being replaced by newer series (progressively)
ⓘ
in service (some sets) ⓘ |
| serviceType | subway ⓘ |
| trackGauge | 1,435 mm standard gauge ⓘ |
| traction | electric motors ⓘ |
| usedFor | through services with other lines (on some routes) ⓘ |
| usedOn |
Osaka Metro
ⓘ
surface form:
Osaka subway network
|
| usedOnLine |
Chūō Line
NERFINISHED
ⓘ
Osaka Metro Midosuji Line ⓘ
surface form:
Midosuji Line (earlier allocations)
Sakaisuji Line NERFINISHED ⓘ |
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: Osaka Metro 20 series Description of subject: The Osaka Metro 20 series is a type of electric multiple unit train used on Osaka's subway network, known for its stainless-steel construction and service on several key lines.
Referenced by (5)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Chuo Line (Osaka Metro)
this entity surface form:
Osaka Municipal Subway 20 series
this entity surface form:
Osaka Metro 21 series trains
this entity surface form:
Osaka Metro 20 series family