Nankai segment
E375879
The Nankai segment is a major portion of the Nankai subduction zone off southwestern Japan that is known for generating powerful megathrust earthquakes and associated tsunamis.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Nankai segment canonical | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T3646894 — 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: Nankai segment Context triple: [Nankai Trough, segment, Nankai segment]
-
A.
Okayama–Hakata section
The Okayama–Hakata section is the western stretch of Japan’s Sanyō Shinkansen high-speed rail line, linking Okayama with Hakata (Fukuoka) across the Chūgoku region.
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B.
Takanawa
Takanawa is an upscale residential and commercial district in Minato, Tokyo, known for its luxury hotels, embassies, and proximity to major transport hubs like Shinagawa Station.
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C.
Nankai Main Line
The Nankai Main Line is a major private railway line in the Osaka region of Japan, operated by Nankai Electric Railway and serving as a key commuter and airport access route.
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D.
Kansai Kūkō
Kansai Kūkō is a major international airport built on an artificial island in Osaka Bay, serving the Kansai region of Japan.
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E.
Surutto Kansai
Surutto Kansai is a Japanese public transportation consortium in the Kansai region that manages and coordinates smart card fare systems and related services across multiple railway and bus operators.
- 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: Nankai segment Target entity description: The Nankai segment is a major portion of the Nankai subduction zone off southwestern Japan that is known for generating powerful megathrust earthquakes and associated tsunamis.
-
A.
Okayama–Hakata section
The Okayama–Hakata section is the western stretch of Japan’s Sanyō Shinkansen high-speed rail line, linking Okayama with Hakata (Fukuoka) across the Chūgoku region.
-
B.
Takanawa
Takanawa is an upscale residential and commercial district in Minato, Tokyo, known for its luxury hotels, embassies, and proximity to major transport hubs like Shinagawa Station.
-
C.
Nankai Main Line
The Nankai Main Line is a major private railway line in the Osaka region of Japan, operated by Nankai Electric Railway and serving as a key commuter and airport access route.
-
D.
Kansai Kūkō
Kansai Kūkō is a major international airport built on an artificial island in Osaka Bay, serving the Kansai region of Japan.
-
E.
Surutto Kansai
Surutto Kansai is a Japanese public transportation consortium in the Kansai region that manages and coordinates smart card fare systems and related services across multiple railway and bus operators.
- F. None of above. chosen
Statements (45)
| Predicate | Object |
|---|---|
| instanceOf | subduction zone segment ⓘ |
| affects | coastal communities of southwestern Japan ⓘ |
| associatedWith |
tsunami of 1707 Hoei earthquake
ⓘ
tsunami of 1946 Nankai earthquake ⓘ |
| country | Japan ⓘ |
| faultType | thrust fault ⓘ |
| geologicalProcess | oceanic plate subduction ⓘ |
| hasHistoricalEarthquake |
Nankai earthquake of 1707
ⓘ
1854 Ansei-Nankai earthquake ⓘ
surface form:
Nankai earthquake of 1854
1946 Nankai earthquake ⓘ
surface form:
Nankai earthquake of 1946
|
| hasSubsegments |
Nankai proper segment
ⓘ
Tokai segment ⓘ Tonankai segment ⓘ |
| hazardPlanningFocusFor | Japanese disaster management agencies ⓘ |
| includedIn | Japanese national seismic hazard models ⓘ |
| knownFor |
megathrust earthquakes
ⓘ
tsunami generation ⓘ |
| locatedIn | southwestern Japan ⓘ |
| locatedOffCoastOf |
Honshu
ⓘ
Kii Peninsula ⓘ Shikoku ⓘ |
| maximumMagnitudeEstimate | around magnitude 8 to 9 ⓘ |
| monitoredBy |
Japan Meteorological Agency
ⓘ
Japanese universities and research institutes ⓘ |
| ocean | Pacific Ocean ⓘ |
| overridingPlate |
Amur Plate
ⓘ
Eurasian Plate ⓘ |
| partOf |
Nankai Trough
ⓘ
Nankai megathrust ⓘ
surface form:
Nankai subduction zone
|
| plateBoundaryType | oceanic-continental convergence ⓘ |
| recurrenceIntervalEstimate | about 100 to 200 years ⓘ |
| researchFocusSince | 20th century ⓘ |
| riskType |
seismic risk
ⓘ
tsunami risk ⓘ |
| ruptureStyle | megathrust faulting ⓘ |
| seismicHazardTo |
Kansai region
ⓘ
surface form:
Kinki region
Kyushu ⓘ
surface form:
Kyushu region
Shikoku ⓘ
surface form:
Shikoku region
Tōkai region ⓘ
surface form:
Tokai region
southwestern Honshu ⓘ |
| studiedFor |
earthquake forecasting
ⓘ
tsunami hazard assessment ⓘ |
| subductingPlate | Philippine Sea Plate ⓘ |
| tectonicSetting | convergent plate boundary ⓘ |
| tsunamiPotential | large tsunami generation ⓘ |
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: Nankai segment Description of subject: The Nankai segment is a major portion of the Nankai subduction zone off southwestern Japan that is known for generating powerful megathrust earthquakes and associated tsunamis.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.