Jōzankei Dam
E762955
Jōzankei Dam is a concrete gravity dam on the Toyohira River in Sapporo, Japan, known for flood control, water supply, and its scenic reservoir surrounded by hot spring resorts.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Jōzankei Dam canonical | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T8865520 — 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: Jōzankei Dam Context triple: [Minami-ku, Sapporo, contains, Jōzankei Dam]
-
A.
Nagayasuguchi Dam
Nagayasuguchi Dam is a hydroelectric dam located on Japan’s Yoshino River, used primarily for power generation and flood control.
-
B.
Shimen Dam
Shimen Dam is a major concrete gravity dam in northern Taiwan that provides water supply, flood control, and hydroelectric power as part of the Shimen Reservoir system.
-
C.
Ogōchi Dam
Ogōchi Dam is a large concrete dam in Okutama, Tokyo, that forms Lake Okutama and serves as a major source of drinking water and flood control for the Tokyo metropolitan area.
-
D.
Ukai Dam
Ukai Dam is a major multi-purpose reservoir and hydroelectric dam in Gujarat, India, built on the Tapi River for irrigation, power generation, and flood control.
-
E.
Hidase Dam
Hidase Dam is a massive hydroelectric dam on the Blue Nile in Ethiopia, designed to be one of Africa’s largest power-generating and infrastructure projects.
- 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: Jōzankei Dam Target entity description: Jōzankei Dam is a concrete gravity dam on the Toyohira River in Sapporo, Japan, known for flood control, water supply, and its scenic reservoir surrounded by hot spring resorts.
-
A.
Nagayasuguchi Dam
Nagayasuguchi Dam is a hydroelectric dam located on Japan’s Yoshino River, used primarily for power generation and flood control.
-
B.
Shimen Dam
Shimen Dam is a major concrete gravity dam in northern Taiwan that provides water supply, flood control, and hydroelectric power as part of the Shimen Reservoir system.
-
C.
Ogōchi Dam
Ogōchi Dam is a large concrete dam in Okutama, Tokyo, that forms Lake Okutama and serves as a major source of drinking water and flood control for the Tokyo metropolitan area.
-
D.
Ukai Dam
Ukai Dam is a major multi-purpose reservoir and hydroelectric dam in Gujarat, India, built on the Tapi River for irrigation, power generation, and flood control.
-
E.
Hidase Dam
Hidase Dam is a massive hydroelectric dam on the Blue Nile in Ethiopia, designed to be one of Africa’s largest power-generating and infrastructure projects.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
concrete gravity dam
ⓘ
dam ⓘ |
| basinArea | 300 km² ⓘ |
| city | Sapporo NERFINISHED ⓘ |
| completionYear | 1989 ⓘ |
| constructionStart | 1974 ⓘ |
| country | Japan ⓘ |
| damVolume | 1,800,000 m³ ⓘ |
| floodControlTargetArea |
Ishikari River lower basin
NERFINISHED
ⓘ
Toyohira River basin NERFINISHED ⓘ |
| hasFacility |
parking area
ⓘ
viewing platform ⓘ visitor center ⓘ |
| hasFunction |
flood mitigation for Sapporo
ⓘ
industrial water supply ⓘ municipal water supply for Sapporo ⓘ river flow regulation ⓘ scenic tourism ⓘ |
| hasNearbySettlement | Jōzankei district of Minami-ku, Sapporo NERFINISHED ⓘ |
| hasReservoir | Jōzankei Reservoir NERFINISHED ⓘ |
| hasSpillwayType | gated overflow spillway ⓘ |
| height | 118 m ⓘ |
| isAccessibleBy | road ⓘ |
| isPartOf | Ishikari River system NERFINISHED ⓘ |
| length | 410 m ⓘ |
| locatedIn |
Hokkaido
NERFINISHED
ⓘ
Sapporo NERFINISHED ⓘ |
| locatedInNationalParkOrQuasiNationalPark | Shikotsu-Toya National Park vicinity ⓘ |
| locatedOnRiver | Toyohira River NERFINISHED ⓘ |
| material | concrete ⓘ |
| near |
Jōzankei Onsen
NERFINISHED
ⓘ
hot spring resorts ⓘ |
| openingYear | 1989 ⓘ |
| operator | Hokkaido Regional Development Bureau NERFINISHED ⓘ |
| owner | Government of Japan NERFINISHED ⓘ |
| purpose |
flood control
ⓘ
hydroelectric power generation ⓘ irrigation ⓘ recreation ⓘ water supply ⓘ |
| region | Hokkaido NERFINISHED ⓘ |
| reservoirCapacityTotal | 82,300,000 m³ ⓘ |
| reservoirName | Jōzankei Reservoir NERFINISHED ⓘ |
| reservoirSurfaceArea | 230 ha ⓘ |
| structureType | gravity dam ⓘ |
| tourismAttraction |
autumn foliage viewing
ⓘ
dam observation deck ⓘ lake sightseeing cruises ⓘ |
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: Jōzankei Dam Description of subject: Jōzankei Dam is a concrete gravity dam on the Toyohira River in Sapporo, Japan, known for flood control, water supply, and its scenic reservoir surrounded by hot spring resorts.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.