Tokyo Metro
E34803
Tokyo Metro is one of the two main rapid transit operators in Tokyo, running an extensive network of subway lines that serve the city’s central and metropolitan areas.
All labels observed (8)
| Label | Occurrences |
|---|---|
| Tokyo Metro canonical | 108 |
| Tokyo Metro network | 23 |
| Tokyo Metro lines | 2 |
| Tokyo Metro subway trains | 2 |
| Tokyo Metro (through services on shared lines) | 1 |
| Tokyo Metro subway network | 1 |
| Tokyo subway network | 1 |
| 東京メトロ | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T262060 — 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: Tokyo Metro Context triple: [Tokyo, hasMetroSystem, Tokyo Metro]
-
A.
Tokyu Den-en-toshi Line
Tokyu Den-en-toshi Line is a major private railway line in the Tokyo metropolitan area that connects central Tokyo with suburban residential districts, including service to Shibuya.
-
B.
Tokyo Metro Hanzomon Line
The Tokyo Metro Hanzomon Line is a major Tokyo subway line that runs east–west across the city center, linking Shibuya with key business and residential districts and offering through services onto private railway lines.
-
C.
Tokyo Metro Fukutoshin Line
The Tokyo Metro Fukutoshin Line is a major Tokyo subway line running north–south through central and suburban areas, connecting key hubs such as Shibuya with other important districts.
-
D.
Tokyo Metro Ginza Line
The Tokyo Metro Ginza Line is one of Tokyo’s oldest and most central subway lines, running east–west through major commercial and business districts including Shibuya and Ginza.
-
E.
Tokyu Toyoko Line
The Tokyu Toyoko Line is a major private railway line in the Tokyo–Yokohama area that connects central Tokyo with Yokohama and links to multiple subway and intercity rail services.
- 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: Tokyo Metro Target entity description: Tokyo Metro is one of the two main rapid transit operators in Tokyo, running an extensive network of subway lines that serve the city’s central and metropolitan areas.
-
A.
Tokyu Den-en-toshi Line
Tokyu Den-en-toshi Line is a major private railway line in the Tokyo metropolitan area that connects central Tokyo with suburban residential districts, including service to Shibuya.
-
B.
Tokyo Metro Hanzomon Line
The Tokyo Metro Hanzomon Line is a major Tokyo subway line that runs east–west across the city center, linking Shibuya with key business and residential districts and offering through services onto private railway lines.
-
C.
Tokyo Metro Fukutoshin Line
The Tokyo Metro Fukutoshin Line is a major Tokyo subway line running north–south through central and suburban areas, connecting key hubs such as Shibuya with other important districts.
-
D.
Tokyo Metro Ginza Line
The Tokyo Metro Ginza Line is one of Tokyo’s oldest and most central subway lines, running east–west through major commercial and business districts including Shibuya and Ginza.
-
E.
Tokyu Toyoko Line
The Tokyu Toyoko Line is a major private railway line in the Tokyo–Yokohama area that connects central Tokyo with Yokohama and links to multiple subway and intercity rail services.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
public transport company
ⓘ
rapid transit operator ⓘ subway operator ⓘ |
| acceptsCard |
PASMO
ⓘ
Suica ⓘ |
| alsoKnownAs |
Teito Rapid Transit Authority
ⓘ
surface form:
Tokyo Metro Co., Ltd.
|
| country | Japan ⓘ |
| electrification |
1500 V DC overhead catenary
ⓘ
1500 V DC third rail ⓘ |
| fareSystem | distance-based fare ⓘ |
| hasFeature |
air-conditioned trains
ⓘ
platform screen doors at many stations ⓘ station numbering system ⓘ women-only cars on some services ⓘ |
| headquartersLocation |
Taitō
ⓘ
surface form:
Taito, Tokyo
Tokyo ⓘ |
| industry |
public transportation
ⓘ
rail transport ⓘ |
| isOneOf | two main rapid transit operators in Tokyo ⓘ |
| languageOfSignage |
Chinese
ⓘ
English ⓘ Japanese ⓘ Korean ⓘ |
| legalForm | joint-stock company ⓘ |
| numberOfLines | 9 ⓘ |
| numberOfStations | over 180 ⓘ |
| offersService |
IC card ticketing
ⓘ
through services onto private railway lines ⓘ |
| operatesInArea |
Tokyo metropolitan area
ⓘ
central Tokyo ⓘ |
| operatesLine |
Tokyo Metro Chiyoda Line
ⓘ
surface form:
Chiyoda Line
Fukutoshin Line ⓘ Tokyo Metro Ginza Line ⓘ
surface form:
Ginza Line
Hanzomon Line ⓘ Hibiya Line ⓘ Marunouchi Line ⓘ Namboku Line ⓘ Tozai Line ⓘ Tokyo Metro Yurakuchō Line ⓘ
surface form:
Yurakucho Line
|
| operatesTransportType |
rapid transit
ⓘ
subway ⓘ |
| owner |
Government of Japan
ⓘ
Tokyo Metropolitan Government ⓘ |
| predecessor | Teito Rapid Transit Authority ⓘ |
| safetyRecord | high safety standards ⓘ |
| serves | Tokyo ⓘ |
| sharesMarketWith | Toei Subway ⓘ |
| trackGauge |
1067 mm
ⓘ
1435 mm ⓘ |
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: Tokyo Metro Description of subject: Tokyo Metro is one of the two main rapid transit operators in Tokyo, running an extensive network of subway lines that serve the city’s central and metropolitan areas.
Referenced by (139)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Tokyo Metro network
this entity surface form:
Tokyo Metro network
this entity surface form:
Tokyo Metro (through services on shared lines)
this entity surface form:
Tokyo Metro network
this entity surface form:
Tokyo Metro network
this entity surface form:
Tokyo Metro network
this entity surface form:
Tokyo Metro network
this entity surface form:
Tokyo Metro network
this entity surface form:
Tokyo Metro network
this entity surface form:
Tokyo Metro network
this entity surface form:
Tokyo Metro network
this entity surface form:
Tokyo Metro network
this entity surface form:
Tokyo Metro lines