Tokyo Metro Marunouchi Line
E264046
The Tokyo Metro Marunouchi Line is one of Tokyo’s main subway lines, running in a loop-like route through central districts and connecting major hubs such as Shinjuku, Tokyo, and Ikebukuro.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Tokyo Metro Marunouchi Line canonical | 13 |
How this entity was disambiguated
This entity first appeared as the object of triple T1360094 — 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 Marunouchi Line Context triple: [Nagatachō, servedBy, Tokyo Metro Marunouchi Line]
-
A.
Tokyo Metro Yurakuchō Line
The Tokyo Metro Yurakuchō Line is a major Tokyo subway line running east–west across the city, connecting central business districts with residential areas and key transit hubs.
-
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 Chiyoda Line
The Tokyo Metro Chiyoda Line is a major Tokyo subway line running north–south through central districts and into suburban areas, connecting key hubs such as Omotesando, Otemachi, and Yoyogi-Uehara.
-
E.
Tokyo Metro Hibiya Line
The Tokyo Metro Hibiya Line is a major Tokyo subway line running through central districts such as Chiyoda, Minato, and Taito, providing key commuter and interline connections across the city.
- 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 Marunouchi Line Target entity description: The Tokyo Metro Marunouchi Line is one of Tokyo’s main subway lines, running in a loop-like route through central districts and connecting major hubs such as Shinjuku, Tokyo, and Ikebukuro.
-
A.
Tokyo Metro Yurakuchō Line
The Tokyo Metro Yurakuchō Line is a major Tokyo subway line running east–west across the city, connecting central business districts with residential areas and key transit hubs.
-
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 Chiyoda Line
The Tokyo Metro Chiyoda Line is a major Tokyo subway line running north–south through central districts and into suburban areas, connecting key hubs such as Omotesando, Otemachi, and Yoyogi-Uehara.
-
E.
Tokyo Metro Hibiya Line
The Tokyo Metro Hibiya Line is a major Tokyo subway line running through central districts such as Chiyoda, Minato, and Taito, providing key commuter and interline connections across the city.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
Tokyo Metro line
ⓘ
rapid transit line ⓘ subway line ⓘ |
| branchOpeningDate | 1961-02-08 ⓘ |
| branchTerminus |
Honancho Station
ⓘ
Nakano-sakaue Station NERFINISHED ⓘ |
| character | underground ⓘ |
| completionDate | 1962-03-23 ⓘ |
| connectsDistrict |
Bunkyō
ⓘ
surface form:
Bunkyo
Chiyoda ⓘ Shinjuku ⓘ Suginami ⓘ Toshima ⓘ |
| country | Japan ⓘ |
| dailyRidership | over 1 million passengers ⓘ |
| depot |
Koishikawa Depot
ⓘ
Nakano Depot ⓘ |
| electrification | 600 V DC third rail ⓘ |
| fareSystem | integrated in Tokyo Metro fare system ⓘ |
| gauge | 1,435 mm standard gauge ⓘ |
| hasBranchLine |
Marunouchi Line
ⓘ
surface form:
Marunouchi Line Honancho branch
|
| hasPlatformScreenDoors | yes (most stations) ⓘ |
| lineColor | red ⓘ |
| lineNumber | 4 ⓘ |
| lineSymbol | M ⓘ |
| locatedIn |
Japan
ⓘ
Tokyo ⓘ |
| notableFeature | one of the oldest subway lines in Tokyo Metro network ⓘ |
| numberOfStations | 28 ⓘ |
| openedSection | Ikebukuro–Ochanomizu section ⓘ |
| openingDate | 1954-01-20 ⓘ |
| operator | Tokyo Metro ⓘ |
| owner | Tokyo Metro ⓘ |
| rollingStock |
Tokyo Metro 02 series (former)
ⓘ
Tokyo Metro 2000 series ⓘ |
| routeType | loop-like route through central Tokyo ⓘ |
| safetySystem | Automatic Train Control ⓘ |
| serves |
Ginza Station
NERFINISHED
ⓘ
Ikebukuro Station ⓘ Kasumigaseki Station NERFINISHED ⓘ Ochanomizu Station NERFINISHED ⓘ Shin-ochanomizu Station NERFINISHED ⓘ Shinjuku Station ⓘ Tokyo Station ⓘ Yotsuya Station ⓘ |
| system | Tokyo Metro ⓘ |
| terminus |
Ikebukuro Station
ⓘ
Ogikubo Station 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: Tokyo Metro Marunouchi Line Description of subject: The Tokyo Metro Marunouchi Line is one of Tokyo’s main subway lines, running in a loop-like route through central districts and connecting major hubs such as Shinjuku, Tokyo, and Ikebukuro.
Referenced by (13)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Nagatachō
subject surface form:
Bunkyō