Kanda River
E390064
The Kanda River is a historically significant urban river in Tokyo, Japan, flowing through several central wards and playing an important role in the city’s drainage and flood control systems.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Kanda River canonical | 4 |
| Kanda River (lower reaches) | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T2825973 — 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: Kanda River Context triple: [Setagaya, hasRiver, Kanda River]
-
A.
Naka River
Naka River is a river in Japan known for lending its name to the Imperial Japanese Navy light cruiser Naka.
-
B.
Iori River
The Iori River is a river in the South Caucasus that flows through eastern Georgia and parts of Azerbaijan before joining the Kura (Mtkvari) River.
-
C.
Hiran River
The Hiran River is a significant river in central India that flows through Madhya Pradesh and Gujarat, supporting local ecosystems and communities before joining the Narmada River.
-
D.
Aruwimi River
The Aruwimi River is a significant river in the Democratic Republic of the Congo, known for flowing through dense equatorial rainforest and contributing substantially to the Congo River basin.
-
E.
Yoshii River
The Yoshii River is a significant river in Japan that serves as one of the main tributaries feeding the larger Shinano River system.
- 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: Kanda River Target entity description: The Kanda River is a historically significant urban river in Tokyo, Japan, flowing through several central wards and playing an important role in the city’s drainage and flood control systems.
-
A.
Naka River
Naka River is a river in Japan known for lending its name to the Imperial Japanese Navy light cruiser Naka.
-
B.
Iori River
The Iori River is a river in the South Caucasus that flows through eastern Georgia and parts of Azerbaijan before joining the Kura (Mtkvari) River.
-
C.
Hiran River
The Hiran River is a significant river in central India that flows through Madhya Pradesh and Gujarat, supporting local ecosystems and communities before joining the Narmada River.
-
D.
Aruwimi River
The Aruwimi River is a significant river in the Democratic Republic of the Congo, known for flowing through dense equatorial rainforest and contributing substantially to the Congo River basin.
-
E.
Yoshii River
The Yoshii River is a significant river in Japan that serves as one of the main tributaries feeding the larger Shinano River system.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
river
ⓘ
urban river ⓘ |
| alsoKnownAs |
Kanda
ⓘ
surface form:
Kanda-gawa
|
| basinSize | approximately 105 square kilometers ⓘ |
| country | Japan ⓘ |
| crossedBy |
Chūō Main Line railway bridges
ⓘ
Yamanote Line railway bridges ⓘ numerous road bridges ⓘ |
| culturalReference | featured in Japanese songs and popular culture ⓘ |
| environmentalIssue | water quality affected by urban runoff ⓘ |
| environmentalManagement | subject to river improvement and restoration projects ⓘ |
| flowsDirection | generally west-to-east through central Tokyo ⓘ |
| flowsInto | Sumida River NERFINISHED ⓘ |
| flowsThrough |
Bunkyō ward
NERFINISHED
ⓘ
Chiyoda ward NERFINISHED ⓘ Nakano ward NERFINISHED ⓘ Shinjuku ward NERFINISHED ⓘ Suginami ward NERFINISHED ⓘ Toshima ward NERFINISHED ⓘ |
| function |
flood control
ⓘ
urban drainage ⓘ |
| hasFeature |
concrete-lined embankments in many sections
ⓘ
sections covered or culverted in dense urban areas ⓘ |
| hasInfrastructure |
Kanda River flood control channel
ⓘ
underground diversion tunnels ⓘ |
| hasJapaneseName | 神田川 ⓘ |
| historicalSignificance |
important role in development of Edo (historic Tokyo)
ⓘ
used historically for water transport and irrigation ⓘ |
| length | approximately 24.6 km ⓘ |
| locatedIn |
Kantō region
ⓘ
Tokyo ⓘ |
| managedBy | Tokyo Metropolitan Government ⓘ |
| mouthLocation | Chiyoda, Tokyo NERFINISHED ⓘ |
| nearbyLandmark | Inokashira Park at its source ⓘ |
| partOf |
Arakawa River
ⓘ
surface form:
Arakawa River water system
Tokyo’s flood control system ⓘ |
| passesNear |
Ochanomizu area
NERFINISHED
ⓘ
Tokyo Dome ⓘ Waseda University ⓘ |
| sourceLocation |
Inokashira Pond
ⓘ
Mitaka, Tokyo NERFINISHED ⓘ |
| tributary |
Kanda Josui (historic waterway)
ⓘ
Myōshōji River NERFINISHED ⓘ Zenpukuji River NERFINISHED ⓘ |
| urbanContext | runs through densely built-up districts of Tokyo ⓘ |
| usedFor |
recreational walking paths along some stretches
ⓘ
urban landscape and green space ⓘ |
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: Kanda River Description of subject: The Kanda River is a historically significant urban river in Tokyo, Japan, flowing through several central wards and playing an important role in the city’s drainage and flood control systems.
Referenced by (5)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Setagaya
this entity surface form:
Kanda River (lower reaches)