Kashiwazaki-Kariwa Nuclear Power Plant
E470565
The Kashiwazaki-Kariwa Nuclear Power Plant is one of the world’s largest nuclear power stations, located in Niigata Prefecture, Japan, and operated by Tokyo Electric Power Company (TEPCO).
All labels observed (1)
| Label | Occurrences |
|---|---|
| Kashiwazaki-Kariwa Nuclear Power Plant canonical | 3 |
How this entity was disambiguated
This entity first appeared as the object of triple T4778735 — 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: Kashiwazaki-Kariwa Nuclear Power Plant Context triple: [Kashiwazaki, knownFor, Kashiwazaki-Kariwa Nuclear Power Plant]
-
A.
Fukushima Daiichi Nuclear Power Plant
Fukushima Daiichi Nuclear Power Plant is a coastal Japanese nuclear power station in Ōkuma, Fukushima Prefecture, widely known as the site of the 2011 reactor meltdowns following a massive earthquake and tsunami.
-
B.
Ohakuri Power Station
Ohakuri Power Station is a major hydroelectric power station on New Zealand’s North Island that harnesses the Waikato River to generate electricity.
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C.
Fukushima
Fukushima is a city in Japan’s Tohoku region, known as the capital of Fukushima Prefecture and for its role in agriculture, hot springs, and regional administration.
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D.
Fukushima Daiichi Unit 3
Fukushima Daiichi Unit 3 is one of the damaged reactors at Japan’s Fukushima Daiichi Nuclear Power Plant, known for suffering a hydrogen explosion and core meltdown during the 2011 nuclear disaster.
-
E.
Fukushima Daiichi Unit 2
Fukushima Daiichi Unit 2 is one of the damaged reactors at Japan’s Fukushima Daiichi Nuclear Power Plant that suffered a core meltdown and severe structural failures following the 2011 earthquake and tsunami.
- 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: Kashiwazaki-Kariwa Nuclear Power Plant Target entity description: The Kashiwazaki-Kariwa Nuclear Power Plant is one of the world’s largest nuclear power stations, located in Niigata Prefecture, Japan, and operated by Tokyo Electric Power Company (TEPCO).
-
A.
Fukushima Daiichi Nuclear Power Plant
Fukushima Daiichi Nuclear Power Plant is a coastal Japanese nuclear power station in Ōkuma, Fukushima Prefecture, widely known as the site of the 2011 reactor meltdowns following a massive earthquake and tsunami.
-
B.
Ohakuri Power Station
Ohakuri Power Station is a major hydroelectric power station on New Zealand’s North Island that harnesses the Waikato River to generate electricity.
-
C.
Fukushima
Fukushima is a city in Japan’s Tohoku region, known as the capital of Fukushima Prefecture and for its role in agriculture, hot springs, and regional administration.
-
D.
Fukushima Daiichi Unit 3
Fukushima Daiichi Unit 3 is one of the damaged reactors at Japan’s Fukushima Daiichi Nuclear Power Plant, known for suffering a hydrogen explosion and core meltdown during the 2011 nuclear disaster.
-
E.
Fukushima Daiichi Unit 2
Fukushima Daiichi Unit 2 is one of the damaged reactors at Japan’s Fukushima Daiichi Nuclear Power Plant that suffered a core meltdown and severe structural failures following the 2011 earthquake and tsunami.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf | nuclear power plant ⓘ |
| constructionStartYear | 1978 ⓘ |
| coolingSource | Sea of Japan NERFINISHED ⓘ |
| country | Japan ⓘ |
| gridConnectionStatus | not generating electricity as of early 2020s ⓘ |
| gridConnectionYear | 1985 ⓘ |
| gridOperator | TEPCO Power Grid NERFINISHED ⓘ |
| hasContainmentType |
ABWR containment
ⓘ
Mark I containment ⓘ |
| hasEmergencyDieselGenerators | true ⓘ |
| hasSafetyUpgrades |
seawall and tsunami countermeasures
ⓘ
seismic reinforcement ⓘ |
| hasSpentFuelPools | true ⓘ |
| locatedIn |
Kariwa, Niigata
NERFINISHED
ⓘ
Kashiwazaki, Niigata NERFINISHED ⓘ Niigata Prefecture NERFINISHED ⓘ |
| locatedOnCoast | true ⓘ |
| municipalityAgreementRequired | true ⓘ |
| notableEvent | 2007 Chūetsu offshore earthquake NERFINISHED ⓘ |
| notableFeature | one of the world’s largest nuclear power stations by installed capacity ⓘ |
| numberOfReactors | 7 ⓘ |
| operator | Tokyo Electric Power Company NERFINISHED ⓘ |
| ownedBy | Tokyo Electric Power Company NERFINISHED ⓘ |
| ownerAbbreviation | TEPCO NERFINISHED ⓘ |
| prefecture | Niigata Prefecture NERFINISHED ⓘ |
| primaryFuel | uranium dioxide ⓘ |
| publicOpposition | significant in Niigata Prefecture ⓘ |
| reactorModel |
ABWR
NERFINISHED
ⓘ
BWR-4 NERFINISHED ⓘ BWR-5 ⓘ |
| reactorSupplier |
General Electric
NERFINISHED
ⓘ
Hitachi NERFINISHED ⓘ Toshiba NERFINISHED ⓘ |
| reactorType | boiling water reactor ⓘ |
| reactorUnit |
Unit 1
ⓘ
Unit 2 NERFINISHED ⓘ Unit 3 ⓘ Unit 4 ⓘ Unit 5 NERFINISHED ⓘ Unit 6 NERFINISHED ⓘ Unit 7 NERFINISHED ⓘ |
| region | Chūbu region NERFINISHED ⓘ |
| regulatoryAuthority | Nuclear Regulation Authority (Japan) NERFINISHED ⓘ |
| regulatoryInspections | enhanced after Fukushima Daiichi accident ⓘ |
| safetyCultureIssues | identified by Japanese regulators in the 2010s ⓘ |
| seismicDesignBasis | revised after 2007 earthquake ⓘ |
| shortName | Kashiwazaki-Kariwa NPP NERFINISHED ⓘ |
| shutdownReason | post-Fukushima safety concerns ⓘ |
| status | shutdown ⓘ |
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: Kashiwazaki-Kariwa Nuclear Power Plant Description of subject: The Kashiwazaki-Kariwa Nuclear Power Plant is one of the world’s largest nuclear power stations, located in Niigata Prefecture, Japan, and operated by Tokyo Electric Power Company (TEPCO).
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Kashiwazaki
Kashiwazaki, Niigata Prefecture, Japan
→
hasNuclearFacility
→
Kashiwazaki-Kariwa Nuclear Power Plant
ⓘ
subject surface form:
Kashiwazaki