Tokyo Metro Tozai Line
E849019
The Tokyo Metro Tozai Line is a major east–west subway line in Tokyo that connects central business districts with residential suburbs and offers through-services onto several private railway lines.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Tokyo Metro Tozai Line canonical | 34 |
| Tokyo Metro Tōzai Line | 11 |
How this entity was disambiguated
This entity first appeared as the object of triple T6339616 — 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 Tozai Line Context triple: [Waseda Campus, publicTransitAccess, Tokyo Metro Tozai Line]
-
A.
Tokyo Metro Marunouchi Line
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.
-
B.
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.
-
C.
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.
-
D.
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.
-
E.
Tokyo Metro Namboku Line
The Tokyo Metro Namboku Line is a north–south subway line in Tokyo operated by Tokyo Metro, known for its deep underground stations and through-services to other railway lines.
- 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 Tozai Line Target entity description: The Tokyo Metro Tozai Line is a major east–west subway line in Tokyo that connects central business districts with residential suburbs and offers through-services onto several private railway lines.
-
A.
Tokyo Metro Marunouchi Line
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.
-
B.
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.
-
C.
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.
-
D.
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.
-
E.
Tokyo Metro Namboku Line
The Tokyo Metro Namboku Line is a north–south subway line in Tokyo operated by Tokyo Metro, known for its deep underground stations and through-services to other railway lines.
- F. None of above. chosen
Statements (56)
| Predicate | Object |
|---|---|
| instanceOf |
rapid transit line
ⓘ
subway line ⓘ |
| connectsTo |
JR Chuo-Sobu Line at Nakano Station
ⓘ
JR Sobu Line at Nishi-Funabashi Station ⓘ Toei Oedo Line at Iidabashi Station ⓘ Tokyo Metro Chiyoda Line at Otemachi Station ⓘ Tokyo Metro Hanzomon Line at Otemachi Station ⓘ
linked to:
Tokyo Metro Hanzomon Line at Otemachi
Tokyo Metro Hibiya Line at Kayabacho Station ⓘ Tokyo Metro Marunouchi Line at Otemachi Station ⓘ Tokyo Metro Toei Shinjuku Line at Kudanshita Station ⓘ |
| direction | east–west ⓘ |
| easternTerminus | Nishi-Funabashi Station NERFINISHED ⓘ |
| electrification | 1500 V DC overhead catenary ⓘ |
| gauge | 1067 mm ⓘ |
| hasRollingStock |
JR East E231-800 series
ⓘ
Tokyo Metro 05 series ⓘ Tokyo Metro 07 series ⓘ Tokyo Metro 15000 series ⓘ Toyo Rapid 2000 series ⓘ
linked to:
Toyo
|
| hasStation |
Baraki-Nakayama Station
NERFINISHED
ⓘ
Gyotoku Station NERFINISHED ⓘ Iidabashi Station NERFINISHED ⓘ Kagurazaka Station NERFINISHED ⓘ Kasai Station NERFINISHED ⓘ Kayabacho Station NERFINISHED ⓘ Kudanshita Station NERFINISHED ⓘ Minami-Gyotoku Station NERFINISHED ⓘ Minami-Sunamachi Station NERFINISHED ⓘ Monzen-nakacho Station NERFINISHED ⓘ Myoden Station NERFINISHED ⓘ Nakano Station NERFINISHED ⓘ Nihombashi Station ⓘ Nishi-Funabashi Station NERFINISHED ⓘ Nishi-Kasai Station NERFINISHED ⓘ Ochiai Station NERFINISHED ⓘ Otemachi Station ⓘ Takadanobaba Station NERFINISHED ⓘ Takebashi Station NERFINISHED ⓘ Toyosu Station NERFINISHED ⓘ Urayasu Station NERFINISHED ⓘ Waseda Station ⓘ |
| hasTerminus |
Nakano Station
NERFINISHED
ⓘ
Nishi-Funabashi Station NERFINISHED ⓘ |
| lineCode | T ⓘ |
| lineColor | sky blue ⓘ |
| locatedIn |
Japan
ⓘ
Tokyo ⓘ |
| notableFor | high passenger congestion during rush hours ⓘ |
| openingDate | 1964 ⓘ |
| operator | Tokyo Metro ⓘ |
| serves |
central business districts of Tokyo
ⓘ
residential suburbs in eastern Tokyo and Chiba Prefecture ⓘ |
| throughServiceWith |
JR East Chuo Line (Rapid)
ⓘ
linked to:
Chūō Line (Rapid)
JR East Chuo-Sobu Line ⓘ
linked to:
JR Chuo-Sobu Line
Toyo Rapid Railway Line ⓘ |
| westernTerminus | Nakano 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 Tozai Line Description of subject: The Tokyo Metro Tozai Line is a major east–west subway line in Tokyo that connects central business districts with residential suburbs and offers through-services onto several private railway lines.
Referenced by (45)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Tokyo Metro Tozai Line
linked to: Tokyo Metro Tozai Line
linked to: Tokyo Metro Tozai Line
linked to: Tokyo Metro Tozai Line
linked to: Tokyo Metro Tozai Line
linked to: Tokyo Metro Tozai Line
subject linked to:
Jimbocho Station on Toei Shinjuku Line
subject linked to:
Tokyo Metro Tozai Line station at Kayabacho
subject linked to:
Tokyo Metro Tozai Line station at Kayabacho
subject linked to:
Kudanshita
subject linked to:
Ichigaya
linked to: Tokyo Metro Tozai Line
linked to: Tokyo Metro Tozai Line
linked to: Tokyo Metro Tozai Line
subject linked to:
Tokyo Metro Hibiya Line (nearby via Kasumigaseki)
subject linked to:
western Chiba Prefecture
linked to: Tokyo Metro Tozai Line