Tobu Tojo Line
E156031
The Tobu Tojo Line is a major private railway line in the Greater Tokyo area operated by Tobu Railway, connecting Ikebukuro in central Tokyo with suburban Saitama Prefecture.
All labels observed (3)
| Label | Occurrences |
|---|---|
| Tobu Tojo Line canonical | 13 |
| Tōbu Tōjō Line | 3 |
| Tobu Tojo Line (via through services) | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T1102243 — 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: Tobu Tojo Line Context triple: [Tokyo Metro Fukutoshin Line, throughServiceWith, Tobu Tojo Line]
-
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.
Keio Inokashira Line
The Keio Inokashira Line is a private railway line in Tokyo operated by Keio Corporation, connecting Shibuya with the western suburb of Kichijōji and serving several popular residential and commercial districts along the way.
-
C.
Yotsubashi Line
The Yotsubashi Line is a rapid transit line in Osaka, Japan, forming part of the Osaka Metro network and serving key north–south corridors through the city.
-
D.
Tanimachi Line
The Tanimachi Line is a major rapid transit line in Osaka, Japan, running north–south through the city as part of the Osaka Metro network.
-
E.
Chuo Line
The Chuo Line is a major rapid transit line in the Osaka Metro system that runs east–west through central Osaka, connecting key commercial and residential districts.
- 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: Tobu Tojo Line Target entity description: The Tobu Tojo Line is a major private railway line in the Greater Tokyo area operated by Tobu Railway, connecting Ikebukuro in central Tokyo with suburban Saitama Prefecture.
-
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.
Keio Inokashira Line
The Keio Inokashira Line is a private railway line in Tokyo operated by Keio Corporation, connecting Shibuya with the western suburb of Kichijōji and serving several popular residential and commercial districts along the way.
-
C.
Yotsubashi Line
The Yotsubashi Line is a rapid transit line in Osaka, Japan, forming part of the Osaka Metro network and serving key north–south corridors through the city.
-
D.
Tanimachi Line
The Tanimachi Line is a major rapid transit line in Osaka, Japan, running north–south through the city as part of the Osaka Metro network.
-
E.
Chuo Line
The Chuo Line is a major rapid transit line in the Osaka Metro system that runs east–west through central Osaka, connecting key commercial and residential districts.
- F. None of above. chosen
Statements (50)
| Predicate | Object |
|---|---|
| instanceOf |
commuter rail line
ⓘ
railway line in Japan ⓘ |
| connects |
Ikebukuro Station
ⓘ
suburban areas of Saitama Prefecture ⓘ |
| connectsWith |
JR Saikyo Line (at Ikebukuro Station)
ⓘ
JR Shonan–Shinjuku Line ⓘ
surface form:
JR Shonan–Shinjuku Line (at Ikebukuro Station)
JR Yamanote Line ⓘ
surface form:
JR Yamanote Line (at Ikebukuro Station)
Seibu Ikebukuro Line ⓘ
surface form:
Seibu Ikebukuro Line (at Ikebukuro Station vicinity)
Tokyo Metro Fukutoshin Line (at Ikebukuro Station) ⓘ Tokyo Metro Fukutoshin Line ⓘ
surface form:
Tokyo Metro Fukutoshin Line (via through services)
Tokyo Metro Marunouchi Line (at Ikebukuro Station) ⓘ Tokyo Metro Yurakucho Line (at Ikebukuro Station) ⓘ Tokyo Metro Yurakuchō Line ⓘ
surface form:
Tokyo Metro Yurakucho Line (via through services)
|
| country | Japan ⓘ |
| electrification | 1,500 V DC overhead catenary ⓘ |
| fareSystem | integrated with Tobu Railway fare system ⓘ |
| gauge | 1,067 mm ⓘ |
| hasColor | dark blue line color on route maps ⓘ |
| hasRollingStock |
Tobu 10030 series
ⓘ
Tobu 30000 series ⓘ Tobu 50050 series ⓘ
surface form:
Tobu 50000 series
Tobu 50050 series ⓘ
surface form:
Tobu 50090 series
Tobu 9000 series ⓘ |
| locatedIn |
Tokyo metropolitan area
ⓘ
surface form:
Greater Tokyo Area
Saitama Prefecture NERFINISHED ⓘ Tokyo ⓘ |
| notableFor | linking central Tokyo with Saitama suburban communities ⓘ |
| operator | Tobu Railway ⓘ |
| owner | Tobu Railway ⓘ |
| partOf |
Tobu Railway
ⓘ
surface form:
Tobu Railway network
|
| primaryStation |
Ikebukuro Station
ⓘ
Kawagoe Station NERFINISHED ⓘ |
| railwayCompanyType | private railway ⓘ |
| railwaySystem | Japanese private railway system ⓘ |
| regionServed |
northwestern Tokyo suburbs
ⓘ
southern Saitama Prefecture ⓘ |
| servesCity |
Higashimatsuyama
ⓘ
Kawagoe ⓘ Ogawa ⓘ Sakado ⓘ Tokyo ⓘ Yorii ⓘ |
| serviceType |
commuter rail
ⓘ
limited express ⓘ local ⓘ rapid ⓘ |
| terminus |
Ikebukuro Station
ⓘ
Yorii Station NERFINISHED ⓘ |
| ticketing | accepts IC cards such as Suica and PASMO ⓘ |
| uses | Japanese railway signalling ⓘ |
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: Tobu Tojo Line Description of subject: The Tobu Tojo Line is a major private railway line in the Greater Tokyo area operated by Tobu Railway, connecting Ikebukuro in central Tokyo with suburban Saitama Prefecture.
Referenced by (17)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Tōbu Tōjō Line
this entity surface form:
Tōbu Tōjō Line
this entity surface form:
Tōbu Tōjō Line
this entity surface form:
Tobu Tojo Line (via through services)