Tobu Railway
E185891
Tobu Railway is a major private railway company in Japan that operates extensive rail networks in the Greater Tokyo area and surrounding regions.
All labels observed (4)
| Label | Occurrences |
|---|---|
| Tobu Railway canonical | 35 |
| Tobu Railway network | 4 |
| Tobu Railway lines | 2 |
| Tōbu Railway | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T1592302 — 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 Railway Context triple: [Tokyo Skytree, owner, Tobu Railway]
-
A.
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.
-
B.
Tobu Nikko Line
The Tobu Nikko Line is a private railway line in Japan operated by Tobu Railway that connects the Tokyo area with the historic and scenic Nikko region in Tochigi Prefecture.
-
C.
Nankai Electric Railway
Nankai Electric Railway is a major private railway company in Japan’s Kansai region, operating key commuter and interurban lines connecting Osaka with Wakayama and Kansai International Airport.
-
D.
JR Saikyo Line
The JR Saikyo Line is a major commuter rail line in the Tokyo metropolitan area operated by JR East, connecting central Tokyo with Saitama Prefecture and serving key hubs such as Shibuya and Shinjuku.
-
E.
Tobu Skytree Line
The Tobu Skytree Line is a major private railway line in the Tokyo area operated by Tobu Railway, serving central Tokyo and extending northward toward Saitama and Tochigi, including access to the Tokyo Skytree.
- 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 Railway Target entity description: Tobu Railway is a major private railway company in Japan that operates extensive rail networks in the Greater Tokyo area and surrounding regions.
-
A.
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.
-
B.
Tobu Nikko Line
The Tobu Nikko Line is a private railway line in Japan operated by Tobu Railway that connects the Tokyo area with the historic and scenic Nikko region in Tochigi Prefecture.
-
C.
Nankai Electric Railway
Nankai Electric Railway is a major private railway company in Japan’s Kansai region, operating key commuter and interurban lines connecting Osaka with Wakayama and Kansai International Airport.
-
D.
JR Saikyo Line
The JR Saikyo Line is a major commuter rail line in the Tokyo metropolitan area operated by JR East, connecting central Tokyo with Saitama Prefecture and serving key hubs such as Shibuya and Shinjuku.
-
E.
Tobu Skytree Line
The Tobu Skytree Line is a major private railway line in the Tokyo area operated by Tobu Railway, serving central Tokyo and extending northward toward Saitama and Tochigi, including access to the Tokyo Skytree.
- F. None of above. chosen
Statements (56)
| Predicate | Object |
|---|---|
| instanceOf |
private railway company
ⓘ
public company ⓘ |
| country | Japan ⓘ |
| electrificationSystem | overhead line ⓘ |
| foundedInPeriod | early 20th century ⓘ |
| hasJapaneseName | 東武鉄道株式会社 ⓘ |
| hasMajorStation |
Asakusa Station
NERFINISHED
ⓘ
Funabashi Station NERFINISHED ⓘ Ikebukuro Station NERFINISHED ⓘ Kita-Senju Station NERFINISHED ⓘ Omiya Station NERFINISHED ⓘ Shin-Tochigi Station NERFINISHED ⓘ Tobu-Nikko Station NERFINISHED ⓘ Tokyo Skytree Station NERFINISHED ⓘ |
| headquartersLocation |
Sumida, Tokyo, Japan
ⓘ
surface form:
Sumida, Tokyo
|
| industry | railway transport ⓘ |
| languageOfName | Japanese ⓘ |
| memberOf | Tobu Group ⓘ |
| notableAttractionAccess |
Kinugawa Onsen
ⓘ
Nikko ⓘ Tokyo Skytree ⓘ |
| operatesService |
Kegon limited express
ⓘ
Kinu limited express ⓘ Kinugawa limited express ⓘ Revaty limited express ⓘ Ryomo limited express ⓘ Spacia limited express ⓘ Tobu Skytree Line ⓘ
surface form:
Tobu Skytree limited express
|
| ownsLine |
Tobu Daishi Line
NERFINISHED
ⓘ
Tobu Isesaki Line NERFINISHED ⓘ Tobu Kameido Line NERFINISHED ⓘ Tobu Kinugawa Line NERFINISHED ⓘ Tobu Kiryū Line NERFINISHED ⓘ Tobu Koizumi Line NERFINISHED ⓘ Tobu Nikko Line NERFINISHED ⓘ Tobu Noda Line NERFINISHED ⓘ Tobu Ogose Line NERFINISHED ⓘ Tobu Sano Line NERFINISHED ⓘ Tobu Skytree Line ⓘ Tobu Tojo Line NERFINISHED ⓘ Tobu Urban Park Line NERFINISHED ⓘ Tobu Utsunomiya Line NERFINISHED ⓘ |
| railNetworkType |
commuter rail
ⓘ
interurban rail ⓘ limited express services ⓘ |
| region | Kantō region ⓘ |
| rollingStockType | electric multiple unit ⓘ |
| serves |
Chiba Prefecture
NERFINISHED
ⓘ
Tokyo metropolitan area ⓘ
surface form:
Greater Tokyo Area
Gunma Prefecture NERFINISHED ⓘ Ibaraki Prefecture NERFINISHED ⓘ Saitama Prefecture NERFINISHED ⓘ Tochigi Prefecture NERFINISHED ⓘ |
| stockExchange | Tokyo Stock Exchange ⓘ |
| tickerSymbol | 9001 ⓘ |
| trackGauge | 1067 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: Tobu Railway Description of subject: Tobu Railway is a major private railway company in Japan that operates extensive rail networks in the Greater Tokyo area and surrounding regions.
Referenced by (42)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Saitama Prefecture
this entity surface form:
Tobu Railway network
this entity surface form:
Tobu Railway network
this entity surface form:
Tobu Railway lines
this entity surface form:
Tobu Railway lines
this entity surface form:
Tobu Railway network
subject surface form:
Takenotsuka Station
this entity surface form:
Tobu Railway network
this entity surface form:
Tōbu Railway