Nagano Electric Railway
E313222
Nagano Electric Railway is a Japanese private railway company operating local train services in and around Nagano City in Nagano Prefecture.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Nagano Electric Railway canonical | 4 |
How this entity was disambiguated
This entity first appeared as the object of triple T2929830 — 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: Nagano Electric Railway Context triple: [Nagano, railwayServedBy, Nagano Electric Railway]
-
A.
Odakyu Electric Railway
Odakyu Electric Railway is a major private railway company in Japan that operates commuter and limited express train services connecting central Tokyo with surrounding suburban and regional areas.
-
B.
Saitama Railway
Saitama Railway is a Japanese railway company operating a key commuter line that connects Saitama Prefecture with the greater Tokyo metropolitan rail network.
-
C.
Kinki Sharyo
Kinki Sharyo is a Japanese manufacturer specializing in the design and production of railway vehicles, including metro and light rail trains used in systems worldwide.
-
D.
Seibu Railway
Seibu Railway is a major private railway operator in the Greater Tokyo area of Japan, running extensive commuter and interurban train services across Tokyo and Saitama.
-
E.
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.
- 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: Nagano Electric Railway Target entity description: Nagano Electric Railway is a Japanese private railway company operating local train services in and around Nagano City in Nagano Prefecture.
-
A.
Odakyu Electric Railway
Odakyu Electric Railway is a major private railway company in Japan that operates commuter and limited express train services connecting central Tokyo with surrounding suburban and regional areas.
-
B.
Saitama Railway
Saitama Railway is a Japanese railway company operating a key commuter line that connects Saitama Prefecture with the greater Tokyo metropolitan rail network.
-
C.
Kinki Sharyo
Kinki Sharyo is a Japanese manufacturer specializing in the design and production of railway vehicles, including metro and light rail trains used in systems worldwide.
-
D.
Seibu Railway
Seibu Railway is a major private railway operator in the Greater Tokyo area of Japan, running extensive commuter and interurban train services across Tokyo and Saitama.
-
E.
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.
- F. None of above. chosen
Statements (31)
| Predicate | Object |
|---|---|
| instanceOf |
private railway operator
ⓘ
railway company ⓘ |
| country | Japan ⓘ |
| hasAbbreviation | Nagaden ⓘ |
| hasHeadquartersLocation |
Nagano City
ⓘ
linked to:
Nagano
|
| hasRollingStockOrigin |
former Odakyu Electric Railway trains
ⓘ
former Tokyo Metro trains ⓘ |
| industry |
public transportation
ⓘ
rail transport ⓘ |
| languageOfName | Japanese ⓘ |
| locatedIn |
Nagano City
ⓘ
linked to:
Nagano
Nagano Prefecture ⓘ |
| operatesIn |
Nagano City
ⓘ
linked to:
Nagano
Nagano Prefecture ⓘ |
| operatesService |
limited express trains
ⓘ
local trains ⓘ |
| ownsLine | Nagano Line ⓘ |
| railGauge | 1,067 mm ⓘ |
| railwayType |
commuter rail
ⓘ
local railway ⓘ |
| regionServed | Chūbu region ⓘ |
| servesTouristArea |
Yamanouchi, Nagano
ⓘ
linked to:
Nozawaonsen, Nagano Prefecture
|
| servesTouristAttraction |
Shiga Kogen area
ⓘ
linked to:
Shiga Kogen ski area
Yudanaka Onsen area ⓘ |
| serviceArea | in and around Nagano City ⓘ |
| serviceType | passenger transport ⓘ |
| terminusStation |
Nagano Station
ⓘ
Yudanaka Station ⓘ |
| trackGauge | Cape gauge ⓘ |
| transportMode | rail ⓘ |
| usesElectrificationSystem | overhead catenary ⓘ |
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: Nagano Electric Railway Description of subject: Nagano Electric Railway is a Japanese private railway company operating local train services in and around Nagano City in Nagano Prefecture.
Referenced by (4)
Full triples — surface form annotated when it differs from this entity's canonical label.