Tokyo Metro Marunouchi Line (at Ikebukuro Station)
E627469
The Tokyo Metro Marunouchi Line at Ikebukuro Station is a major Tokyo subway line stop that serves as a key transfer point between central Tokyo’s metro network and multiple suburban and urban rail lines.
All labels observed (4)
How this entity was disambiguated
This entity first appeared as the object of triple T6795014 — 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 (at Ikebukuro Station) Context triple: [Tobu Tojo Line, connectsWith, Tokyo Metro Marunouchi Line (at Ikebukuro Station)]
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A.
JR Saikyo Line (at Ikebukuro Station)
The JR Saikyo Line at Ikebukuro Station is a major JR East commuter rail line in Tokyo that provides rapid north–south access through the city and connects with multiple private and subway lines.
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B.
Tokyo Metro Chiyoda Line at Omotesando
The Tokyo Metro Chiyoda Line at Omotesando is a major subway line stop in central Tokyo that serves the fashionable Omotesando district and connects with other key metro routes.
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C.
Tokyo Metro Ginza Line at Kanda Station
Tokyo Metro Ginza Line at Kanda Station is the Ginza Line subway stop in Tokyo’s Kanda district, providing underground metro service and transfers to JR railway lines.
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D.
Tokyo Metro Hibiya Line at Kayabacho
Tokyo Metro Hibiya Line at Kayabacho is a busy Tokyo subway line stop in the Nihonbashi business district, providing key access to central commercial and financial areas.
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E.
Tokyo Metro Yurakucho Line at Nagatacho
Tokyo Metro Yurakucho Line at Nagatacho is a subway line stop in central Tokyo that serves the Nagatacho district and connects with multiple other Tokyo Metro lines for convenient transfers.
- 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 (at Ikebukuro Station) Target entity description: The Tokyo Metro Marunouchi Line at Ikebukuro Station is a major Tokyo subway line stop that serves as a key transfer point between central Tokyo’s metro network and multiple suburban and urban rail lines.
-
A.
JR Saikyo Line (at Ikebukuro Station)
The JR Saikyo Line at Ikebukuro Station is a major JR East commuter rail line in Tokyo that provides rapid north–south access through the city and connects with multiple private and subway lines.
-
B.
Tokyo Metro Chiyoda Line at Omotesando
The Tokyo Metro Chiyoda Line at Omotesando is a major subway line stop in central Tokyo that serves the fashionable Omotesando district and connects with other key metro routes.
-
C.
Tokyo Metro Ginza Line at Kanda Station
Tokyo Metro Ginza Line at Kanda Station is the Ginza Line subway stop in Tokyo’s Kanda district, providing underground metro service and transfers to JR railway lines.
-
D.
Tokyo Metro Hibiya Line at Kayabacho
Tokyo Metro Hibiya Line at Kayabacho is a busy Tokyo subway line stop in the Nihonbashi business district, providing key access to central commercial and financial areas.
-
E.
Tokyo Metro Yurakucho Line at Nagatacho
Tokyo Metro Yurakucho Line at Nagatacho is a subway line stop in central Tokyo that serves the Nagatacho district and connects with multiple other Tokyo Metro lines for convenient transfers.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
metro line station complex
ⓘ
railway station stop ⓘ |
| accessibility | barrier-free access available via elevators and slopes ⓘ |
| adjacentStationTowardsOgikubo | Shin-otsuka Station NERFINISHED ⓘ |
| adjacentStationTowardsShinjuku | Shin-otsuka Station NERFINISHED ⓘ |
| connectsTo |
JR East Ikebukuro Station
ⓘ
linked to:
Ikebukuro Station
JR Saikyo Line at Ikebukuro ⓘ JR Shonan Shinjuku Line ⓘ
linked to:
JR Shonan–Shinjuku Line
JR Shonan Shinjuku Line at Ikebukuro ⓘ JR Shonan-Shinjuku Line at Ikebukuro ⓘ
linked to:
Shonan–Shinjuku Line at Ikebukuro Station
JR Shonan–Shinjuku Line ⓘ JR Shonan–Shinjuku Line at Ikebukuro ⓘ
linked to:
Shonan–Shinjuku Line at Ikebukuro Station
JR Yamanote Line at Ikebukuro ⓘ Seibu Ikebukuro Line at Ikebukuro ⓘ Tobu Tojo Line at Ikebukuro ⓘ
linked to:
Tobu Tojo Line
Tokyo Metro Fukutoshin Line at Ikebukuro ⓘ Tokyo Metro Yurakucho Line at Ikebukuro ⓘ |
| country | Japan ⓘ |
| fareSystem | Tokyo Metro fare system ⓘ |
| fareZone |
Tokyo Metro standard urban zone
ⓘ
linked to:
Tokyo Metro zone
|
| function | key transfer point between central Tokyo metro network and multiple suburban and urban rail lines ⓘ |
| hasFacilities |
elevators
ⓘ
escalators ⓘ restrooms ⓘ station signage in Japanese and English ⓘ ticket gates ⓘ |
| locatedIn |
Ikebukuro Station
ⓘ
Tokyo ⓘ Toshima, Tokyo ⓘ |
| locatedUnder |
Ikebukuro district
ⓘ
linked to:
Ikebukuro
|
| networkRole | link between Ikebukuro and central Tokyo ⓘ |
| openedAsPartOfLine | Tokyo Metro Marunouchi Line initial section ⓘ |
| operator | Tokyo Metro ⓘ |
| partOf | Tokyo Metro Marunouchi Line ⓘ |
| platformType | underground island platform ⓘ |
| role |
interchange station
ⓘ
transfer point between metro and suburban rail lines ⓘ |
| safetyFeatures | platform edge doors (on Marunouchi Line platforms at Ikebukuro) ⓘ |
| servedByLine | Tokyo Metro Marunouchi Line ⓘ |
| servesArea |
Ikebukuro commercial district
ⓘ
linked to:
Ikebukuro
Sunshine City area (via Ikebukuro Station) ⓘ |
| signageCodeColor | red (Marunouchi Line color) ⓘ |
| stationCode | M-25 ⓘ |
| structureType | underground ⓘ |
| symbol | M in a red circle ⓘ |
| terminusStatus | northern terminus of main Marunouchi Line trunk ⓘ |
| ticketing | IC cards accepted (Suica, PASMO and compatible cards) ⓘ |
| usage | heavy passenger traffic, especially during rush hours ⓘ |
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 (at Ikebukuro Station) Description of subject: The Tokyo Metro Marunouchi Line at Ikebukuro Station is a major Tokyo subway line stop that serves as a key transfer point between central Tokyo’s metro network and multiple suburban and urban rail lines.
Referenced by (5)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Tokyo Metro Marunouchi Line (at Ikebukuro Station)
linked to: Tokyo Metro Marunouchi Line (at Ikebukuro Station)
JR Saikyo Line (at Ikebukuro Station)
→
connectsToLineAtStation
→
Tokyo Metro Marunouchi Line at Ikebukuro Station
ⓘ
linked to: Tokyo Metro Marunouchi Line (at Ikebukuro Station)
Tokyo Metro Yurakucho Line (Ikebukuro Station)
→
connectsTo
→
Tokyo Metro Marunouchi Line (Ikebukuro Station)
ⓘ
subject linked to:
Tokyo Metro Yurakucho Line (at Ikebukuro Station)
linked to: Tokyo Metro Marunouchi Line (at Ikebukuro Station)