Arakawa River
E249387
The Arakawa River is a major river in the Tokyo region of Japan, known for its extensive flood control systems and role in shaping the urban landscape.
All labels observed (4)
| Label | Occurrences |
|---|---|
| Arakawa River canonical | 23 |
| Arakawa River system | 2 |
| Arakawa River (nearby) | 1 |
| Arakawa River water system | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T1592248 — 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: Arakawa River Context triple: [Sumida, traversedByRiver, Arakawa River]
-
A.
Yamato River
The Yamato River is a major river in Japan’s Kansai region that flows through Nara and Osaka Prefectures before emptying into Osaka Bay.
-
B.
Yoshino River
The Yoshino River is one of Japan’s major rivers, renowned for its strong currents, hydroelectric dams, and scenic gorges as it flows across the island of Shikoku.
-
C.
Mukogawa River
The Mukogawa River is a prominent river in Japan’s Hyōgo Prefecture that flows through cities such as Nishinomiya before emptying into Osaka Bay.
-
D.
Shinano River
The Shinano River is Japan’s longest river, flowing through central Honshu before emptying into the Sea of Japan.
-
E.
Ume River
The Ume River is a significant river in northern Sweden that flows through Västerbotten County and the city of Umeå before emptying into the Gulf of Bothnia.
- 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: Arakawa River Target entity description: The Arakawa River is a major river in the Tokyo region of Japan, known for its extensive flood control systems and role in shaping the urban landscape.
-
A.
Yamato River
The Yamato River is a major river in Japan’s Kansai region that flows through Nara and Osaka Prefectures before emptying into Osaka Bay.
-
B.
Yoshino River
The Yoshino River is one of Japan’s major rivers, renowned for its strong currents, hydroelectric dams, and scenic gorges as it flows across the island of Shikoku.
-
C.
Mukogawa River
The Mukogawa River is a prominent river in Japan’s Hyōgo Prefecture that flows through cities such as Nishinomiya before emptying into Osaka Bay.
-
D.
Shinano River
The Shinano River is Japan’s longest river, flowing through central Honshu before emptying into the Sea of Japan.
-
E.
Ume River
The Ume River is a significant river in northern Sweden that flows through Västerbotten County and the city of Umeå before emptying into the Gulf of Bothnia.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
geographical feature
ⓘ
river ⓘ |
| basinSize | approximately 2940 square kilometers ⓘ |
| country | Japan ⓘ |
| crossedBy |
Metropolitan Expressway bridges
ⓘ
national highway bridges ⓘ railway bridges ⓘ |
| dischargesInto | Tokyo Bay ⓘ |
| etymology | name literally means “wild river” in Japanese ⓘ |
| flowsThrough |
Saitama Prefecture
ⓘ
Tokyo ⓘ |
| hasChannel | Arakawa floodway ⓘ |
| hasFeature |
cycling paths
ⓘ
riverside parks ⓘ |
| hasInfrastructure |
floodwalls
ⓘ
levees ⓘ retarding basins ⓘ water gates ⓘ |
| historicalRole | flooding of Edo and Tokyo before modern control works ⓘ |
| inLanguage | Japanese ⓘ |
| JapaneseName | 荒川 ⓘ |
| knownFor |
extensive flood control systems
ⓘ
role in shaping the Tokyo urban landscape ⓘ |
| length | approximately 173 kilometers ⓘ |
| locatedIn | Kantō region ⓘ |
| locatedNear | Sumida River ⓘ |
| managedBy |
Kanto Regional Development Bureau
ⓘ
Ministry of Land, Infrastructure, Transport and Tourism of Japan ⓘ |
| mouthLocation | Tokyo Bay ⓘ |
| partOf | Tokyo metropolitan area ⓘ |
| passesThrough |
Adachi, Tokyo
ⓘ
Arakawa, Tokyo ⓘ Kawagoe ⓘ Kita, Tokyo ⓘ Kumagaya ⓘ Kōtō, Tokyo ⓘ Toda ⓘ |
| riverSystem |
Arakawa River system
ⓘ
linked to:
Arakawa River
|
| sourceLocation | Saitama Prefecture ⓘ |
| sourceRegion | Chichibu Mountains ⓘ |
| tributary |
Ayase River
ⓘ
Iruma River ⓘ Oppe River ⓘ Shingashi River ⓘ Sumida River ⓘ |
| usedFor |
flood control
ⓘ
recreation ⓘ 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: Arakawa River Description of subject: The Arakawa River is a major river in the Tokyo region of Japan, known for its extensive flood control systems and role in shaping the urban landscape.
Referenced by (27)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject linked to:
Saitama Prefecture, Japan
linked to: Arakawa River
linked to: Arakawa River
linked to: Arakawa River