Oigawa River
E1038624
The Oigawa River is a major river in central Japan known for its scenic valleys, hydroelectric dams, and the historic Oigawa Railway that runs along its banks.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Oigawa River canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T11523307 — 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: Oigawa River Context triple: [Shizuoka Prefecture, contains, Oigawa River]
-
A.
Inagawa River
The Inagawa River is a river in Japan’s Kansai region that flows through Hyōgo Prefecture, including the city of Amagasaki, before emptying into Osaka Bay.
-
B.
Kumagawa River
Kumagawa River is a major river in Japan’s Kyushu region known for its fast currents, scenic gorges, and frequent flooding.
-
C.
Shakujii River
Shakujii River is a tributary of the Arakawa River flowing through western and northern Tokyo, known for its urban green corridors and riverside parks.
-
D.
Yoshida River
The Yoshida River is a significant waterway flowing through Japan’s Miyagi Prefecture, contributing to the region’s natural landscape and local ecosystems.
-
E.
Okawa River
The Okawa River is a prominent waterway running through Osaka, Japan, known for its scenic riverside views and role as a central stage for major cultural events and festivals.
- 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: Oigawa River Target entity description: The Oigawa River is a major river in central Japan known for its scenic valleys, hydroelectric dams, and the historic Oigawa Railway that runs along its banks.
-
A.
Inagawa River
The Inagawa River is a river in Japan’s Kansai region that flows through Hyōgo Prefecture, including the city of Amagasaki, before emptying into Osaka Bay.
-
B.
Kumagawa River
Kumagawa River is a major river in Japan’s Kyushu region known for its fast currents, scenic gorges, and frequent flooding.
-
C.
Shakujii River
Shakujii River is a tributary of the Arakawa River flowing through western and northern Tokyo, known for its urban green corridors and riverside parks.
-
D.
Yoshida River
The Yoshida River is a significant waterway flowing through Japan’s Miyagi Prefecture, contributing to the region’s natural landscape and local ecosystems.
-
E.
Okawa River
The Okawa River is a prominent waterway running through Osaka, Japan, known for its scenic riverside views and role as a central stage for major cultural events and festivals.
- F. None of above. chosen
Statements (29)
| Predicate | Object |
|---|---|
| instanceOf | river ⓘ |
| associatedWith | Oigawa Railway NERFINISHED ⓘ |
| country | Japan ⓘ |
| flowsInto | Suruga Bay NERFINISHED ⓘ |
| flowsThrough | Shizuoka Prefecture NERFINISHED ⓘ |
| hasInfrastructure | hydroelectric dam ⓘ |
| hasJapaneseName | 大井川 ⓘ |
| hasRailwayAlongBank | Oigawa Railway NERFINISHED ⓘ |
| hasRomanizedName | Ōigawa NERFINISHED ⓘ |
| hasSourceIn |
Akaishi Mountains
NERFINISHED
ⓘ
Southern Japanese Alps NERFINISHED ⓘ |
| hasTributary |
Ikawa River
NERFINISHED
ⓘ
Sumata River NERFINISHED ⓘ |
| hasValley | Sumatakyo Gorge NERFINISHED ⓘ |
| isPartOf | rivers of Japan ⓘ |
| knownFor |
Oigawa Railway
NERFINISHED
ⓘ
hydroelectric dams ⓘ scenic valleys ⓘ |
| languageOfName | Japanese ⓘ |
| locatedIn |
Chūbu region
NERFINISHED
ⓘ
Shizuoka Prefecture NERFINISHED ⓘ |
| locatedNear | Shizuoka City NERFINISHED ⓘ |
| locatedOnIsland | Honshu ⓘ |
| mouthEmptiesInto | Pacific Ocean NERFINISHED ⓘ |
| mouthLocatedIn | Suruga Bay NERFINISHED ⓘ |
| region | central Japan ⓘ |
| usedFor |
hydroelectric power generation
ⓘ
irrigation ⓘ water supply ⓘ |
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: Oigawa River Description of subject: The Oigawa River is a major river in central Japan known for its scenic valleys, hydroelectric dams, and the historic Oigawa Railway that runs along its banks.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Shizuoka Prefecture