NEXCO West Japan
E254958
NEXCO West Japan is a major Japanese expressway company responsible for managing and operating toll roads and related infrastructure in the western regions of Japan.
All labels observed (5)
| Label | Occurrences |
|---|---|
| NEXCO West Japan canonical | 17 |
| West Nippon Expressway Company | 14 |
| NEXCO West | 3 |
| NEXCO West Japan (West Nippon Expressway Company) | 1 |
| 西日本高速道路株式会社 | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T2284922 — 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: NEXCO West Japan Context triple: [Meishin Expressway, operator, NEXCO West Japan]
-
A.
NEXCO Central Japan
NEXCO Central Japan is a major Japanese expressway company responsible for operating and maintaining toll roads and related infrastructure in the central region of Japan.
-
B.
West Japan Railway Company
West Japan Railway Company is one of Japan’s major regional railway operators, managing extensive rail networks across western Honshu including the Kansai area.
-
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.
Tokyu Corporation
Tokyu Corporation is a major Japanese private railway and real estate company based in Tokyo, known for operating extensive rail networks and developing commercial and residential areas, particularly around Shibuya.
-
E.
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.
- 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: NEXCO West Japan Target entity description: NEXCO West Japan is a major Japanese expressway company responsible for managing and operating toll roads and related infrastructure in the western regions of Japan.
-
A.
NEXCO Central Japan
NEXCO Central Japan is a major Japanese expressway company responsible for operating and maintaining toll roads and related infrastructure in the central region of Japan.
-
B.
West Japan Railway Company
West Japan Railway Company is one of Japan’s major regional railway operators, managing extensive rail networks across western Honshu including the Kansai area.
-
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.
Tokyu Corporation
Tokyu Corporation is a major Japanese private railway and real estate company based in Tokyo, known for operating extensive rail networks and developing commercial and residential areas, particularly around Shibuya.
-
E.
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.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
Japanese company
ⓘ
expressway company ⓘ toll road operator ⓘ |
| abbreviation |
NEXCO West
ⓘ
linked to:
NEXCO West Japan
NEXCO West Japan ⓘ |
| aimsTo |
ensure safe and smooth traffic flow
ⓘ
support regional economic development in western Japan ⓘ |
| businessModel | toll road concession ⓘ |
| country | Japan ⓘ |
| engagesIn |
disaster prevention measures on expressways
ⓘ
road construction projects ⓘ road renovation projects ⓘ |
| focusesOn | expressway network in western Japan ⓘ |
| hasJapaneseName | 西日本高速道路株式会社 ⓘ |
| hasParentOrganization |
Nippon Expressway Company Limited
ⓘ
linked to:
Nippon Expressway Company Group
|
| hasWebsite | https://www.w-nexco.co.jp/ ⓘ |
| headquartersLocation | Osaka Prefecture ⓘ |
| industry |
infrastructure management
ⓘ
road transportation ⓘ toll road operation ⓘ |
| languageOfName | Japanese ⓘ |
| operatesInRegion |
Chugoku region
ⓘ
linked to:
Chūgoku region
Kansai region ⓘ Kyushu region ⓘ
linked to:
Kyushu
Shikoku region ⓘ
linked to:
Shikoku
western Japan ⓘ |
| owns | expressway infrastructure ⓘ |
| partOf |
NEXCO Group
ⓘ
linked to:
Nippon Expressway Company Group
|
| providesService |
emergency road services
ⓘ
highway network management ⓘ road information services ⓘ |
| regulates | toll pricing on its network ⓘ |
| relatedTo |
NEXCO Central Japan
ⓘ
NEXCO East Japan ⓘ
linked to:
East Nippon Expressway Company
|
| responsibleFor |
maintenance of expressways
ⓘ
management of expressways ⓘ operation of expressways ⓘ parking areas on expressways ⓘ road safety measures ⓘ service areas on expressways ⓘ toll collection ⓘ traffic control on expressways ⓘ |
| subjectTo | Japanese government oversight ⓘ |
| typeOfRoadsManaged |
high-standard trunk roads
ⓘ
toll expressways ⓘ |
| usesBrand |
NEXCO
ⓘ
linked to:
Nippon Expressway Company Group
|
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: NEXCO West Japan Description of subject: NEXCO West Japan is a major Japanese expressway company responsible for managing and operating toll roads and related infrastructure in the western regions of Japan.
Referenced by (36)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: NEXCO West Japan
linked to: NEXCO West Japan
linked to: NEXCO West Japan
linked to: NEXCO West Japan
linked to: NEXCO West Japan
linked to: NEXCO West Japan
linked to: NEXCO West Japan
linked to: NEXCO West Japan
linked to: NEXCO West Japan
linked to: NEXCO West Japan
linked to: NEXCO West Japan
linked to: NEXCO West Japan
linked to: NEXCO West Japan
linked to: NEXCO West Japan
linked to: NEXCO West Japan
linked to: NEXCO West Japan
linked to: NEXCO West Japan
linked to: NEXCO West Japan