Keisei Electric Railway
E694154
Keisei Electric Railway is a major private railway operator in the Greater Tokyo area, best known for linking central Tokyo with Chiba Prefecture and Narita International Airport.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Keisei Electric Railway canonical | 12 |
| Keisei Electric Railway network | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T7798996 — 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: Keisei Electric Railway Context triple: [Chiba, isServedBy, Keisei 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.
Sanyo Electric Railway
Sanyo Electric Railway is a Japanese private railway company operating commuter rail services primarily in Hyōgo Prefecture, including routes that interconnect with other major regional rail networks.
-
C.
Keihan Electric Railway Co., Ltd.
Keihan Electric Railway Co., Ltd. is a major Japanese private railway operator serving the Osaka–Kyoto region, known for its extensive commuter rail network and related transportation and leisure businesses.
-
D.
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.
-
E.
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.
- 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: Keisei Electric Railway Target entity description: Keisei Electric Railway is a major private railway operator in the Greater Tokyo area, best known for linking central Tokyo with Chiba Prefecture and Narita International Airport.
-
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.
Sanyo Electric Railway
Sanyo Electric Railway is a Japanese private railway company operating commuter rail services primarily in Hyōgo Prefecture, including routes that interconnect with other major regional rail networks.
-
C.
Keihan Electric Railway Co., Ltd.
Keihan Electric Railway Co., Ltd. is a major Japanese private railway operator serving the Osaka–Kyoto region, known for its extensive commuter rail network and related transportation and leisure businesses.
-
D.
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.
-
E.
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.
- F. None of above. chosen
Statements (50)
| Predicate | Object |
|---|---|
| instanceOf |
private railway operator
ⓘ
public company ⓘ railway company of Japan ⓘ |
| connectsWith |
Hokuso Railway
NERFINISHED
ⓘ
Keikyu Corporation NERFINISHED ⓘ Shibayama Railway NERFINISHED ⓘ Toei Asakusa Line NERFINISHED ⓘ |
| country | Japan ⓘ |
| electrification | 1,500 V DC overhead catenary ⓘ |
| hasRollingStockType |
3000 series EMU
NERFINISHED
ⓘ
3100 series EMU NERFINISHED ⓘ 3400 series EMU NERFINISHED ⓘ 3500 series EMU NERFINISHED ⓘ 3600 series EMU NERFINISHED ⓘ 3700 series EMU NERFINISHED ⓘ 3800 series EMU NERFINISHED ⓘ AE series EMU NERFINISHED ⓘ |
| headquartersLocation | Ichikawa, Chiba Prefecture, Japan NERFINISHED ⓘ |
| inception | 1909 ⓘ |
| industry |
public transportation
ⓘ
rail transport ⓘ |
| legalForm | Kabushiki gaisha ⓘ |
| majorStation |
Funabashi Station
NERFINISHED
ⓘ
Keisei Ueno Station NERFINISHED ⓘ Narita Airport Terminal 1 Station NERFINISHED ⓘ Narita Airport Terminal 2·3 Station NERFINISHED ⓘ Nippori Station NERFINISHED ⓘ |
| memberOf | Keisei Group NERFINISHED ⓘ |
| notableFor | airport rail link between central Tokyo and Narita International Airport ⓘ |
| operatesService |
Access Express
NERFINISHED
ⓘ
Cityliner NERFINISHED ⓘ Eveningliner NERFINISHED ⓘ Morningliner NERFINISHED ⓘ Skyliner NERFINISHED ⓘ |
| originalName | Chiba Electric Railway NERFINISHED ⓘ |
| ownsLine |
Keisei Chiba Line
NERFINISHED
ⓘ
Keisei Chihara Line NERFINISHED ⓘ Keisei Kanamachi Line NERFINISHED ⓘ Keisei Main Line NERFINISHED ⓘ Keisei Oshiage Line NERFINISHED ⓘ Narita Sky Access Line NERFINISHED ⓘ |
| parentCompanyOf | Hokuso Railway (partial ownership) NERFINISHED ⓘ |
| serves |
Chiba Prefecture
NERFINISHED
ⓘ
Greater Tokyo Area NERFINISHED ⓘ Narita International Airport NERFINISHED ⓘ Tokyo Metropolis NERFINISHED ⓘ |
| stockExchange | Tokyo Stock Exchange NERFINISHED ⓘ |
| tickerSymbol | 9009 ⓘ |
| trackGauge | 1,435 mm standard gauge ⓘ |
| website | https://www.keisei.co.jp/ ⓘ |
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: Keisei Electric Railway Description of subject: Keisei Electric Railway is a major private railway operator in the Greater Tokyo area, best known for linking central Tokyo with Chiba Prefecture and Narita International Airport.
Referenced by (14)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Narita
this entity surface form:
Keisei Electric Railway network
subject surface form:
Terminal 2 (Narita International Airport)
this entity surface form:
Keisei Electric Railway network