Tokyo electric power grid
E934372
The Tokyo electric power grid is the large-scale electrical infrastructure that supplies and distributes electricity throughout the Tokyo metropolitan area and surrounding regions.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Tokyo electric power grid canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T11574880 — 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: Tokyo electric power grid Context triple: [Midorigaoka, hasElectricPowerGrid, Tokyo electric power grid]
-
A.
Eizan Cable
Eizan Cable is a cable railway line in Kyoto, Japan, that transports passengers up the slopes of Mount Hiei.
-
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.
Kashiwazaki-Kariwa Nuclear Power Plant
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).
-
D.
Nadi–Tokyo
Nadi–Tokyo is an international flight route linking Nadi, Fiji with Tokyo, Japan, serving as a key air connection between the South Pacific and East Asia.
-
E.
Ikata Nuclear Power Plant
The Ikata Nuclear Power Plant is a coastal nuclear power facility in Ehime Prefecture, Japan, that has been a focal point of the country’s post-Fukushima energy and safety debates.
- 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: Tokyo electric power grid Target entity description: The Tokyo electric power grid is the large-scale electrical infrastructure that supplies and distributes electricity throughout the Tokyo metropolitan area and surrounding regions.
-
A.
Eizan Cable
Eizan Cable is a cable railway line in Kyoto, Japan, that transports passengers up the slopes of Mount Hiei.
-
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.
Kashiwazaki-Kariwa Nuclear Power Plant
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).
-
D.
Nadi–Tokyo
Nadi–Tokyo is an international flight route linking Nadi, Fiji with Tokyo, Japan, serving as a key air connection between the South Pacific and East Asia.
-
E.
Ikata Nuclear Power Plant
The Ikata Nuclear Power Plant is a coastal nuclear power facility in Ehime Prefecture, Japan, that has been a focal point of the country’s post-Fukushima energy and safety debates.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
electric power grid
ⓘ
energy infrastructure ⓘ |
| abbreviationOfOperator | TEPCO NERFINISHED ⓘ |
| country | Japan ⓘ |
| criticalFor | Tokyo metropolitan economy NERFINISHED ⓘ |
| distributionVoltageToConsumers |
100 V
ⓘ
200 V ⓘ |
| frequency | 50 hertz ⓘ |
| hasCountermeasures |
automatic load-shedding systems
ⓘ
redundant transmission routes ⓘ seismic reinforcement ⓘ |
| hasFeature |
high urban load density
ⓘ
multiple large-scale substations ⓘ underground transmission lines in central Tokyo ⓘ |
| hasHVDCInterconnection |
Higashi-Shimizu Frequency Converter Station
NERFINISHED
ⓘ
Higashi-Yamanashi Frequency Converter Station NERFINISHED ⓘ Sakuma Frequency Converter Station NERFINISHED ⓘ Shin-Shinano Frequency Converter Station NERFINISHED ⓘ |
| interconnectedWith |
Chubu electric power grid
ⓘ
Tohoku electric power grid ⓘ |
| locatedIn |
Kanto region
NERFINISHED
ⓘ
Tokyo metropolitan area NERFINISHED ⓘ |
| operatedBy | Tokyo Electric Power Company Holdings NERFINISHED ⓘ |
| primaryEnergySources |
hydroelectric power plants
GENERATED
ⓘ
nuclear power plants GENERATED ⓘ renewable energy plants GENERATED ⓘ thermal power plants GENERATED ⓘ |
| regulator | Ministry of Economy, Trade and Industry of Japan NERFINISHED ⓘ |
| servesPopulation | tens of millions of people ⓘ |
| subjectTo | Japanese Electricity Business Act NERFINISHED ⓘ |
| suppliesElectricityTo |
Chiba Prefecture
NERFINISHED
ⓘ
Gunma Prefecture NERFINISHED ⓘ Ibaraki Prefecture NERFINISHED ⓘ Kanagawa Prefecture NERFINISHED ⓘ Saitama Prefecture NERFINISHED ⓘ Tochigi Prefecture NERFINISHED ⓘ Tokyo NERFINISHED ⓘ Yamanashi Prefecture NERFINISHED ⓘ eastern Shizuoka Prefecture NERFINISHED ⓘ |
| timeZone | Japan Standard Time ⓘ |
| usesVoltageLevel |
154 kV
ⓘ
22 kV ⓘ 275 kV ⓘ 500 kV ⓘ 6.6 kV ⓘ 66 kV ⓘ |
| vulnerableTo |
earthquakes
ⓘ
typhoons ⓘ |
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: Tokyo electric power grid Description of subject: The Tokyo electric power grid is the large-scale electrical infrastructure that supplies and distributes electricity throughout the Tokyo metropolitan area and surrounding regions.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.