Kamioka mine
E726790
Kamioka mine is a former lead and zinc mine in Japan that now hosts major underground physics laboratories, including the Kamioka Observatory, for neutrino and astroparticle research.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Kamioka mine canonical | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T8174995 — 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: Kamioka mine Context triple: [Kamioka Observatory, locatedInStructure, Kamioka mine]
-
A.
Tokai to Kamioka
Tokai to Kamioka is a long-baseline neutrino oscillation experiment in Japan that studies how neutrinos change type as they travel from the J-PARC facility in Tokai to the Super-Kamiokande detector in Kamioka.
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B.
Ikuno Silver Mine
Ikuno Silver Mine is a historic Japanese mining site in Hyōgo Prefecture, known for its former silver production tunnels, industrial heritage, and museum exhibits on mining history.
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C.
Sado gold mine
The Sado gold mine is a historic and once-prolific gold and silver mine on Sado Island in Niigata Prefecture, Japan, now preserved as a cultural heritage and tourist site.
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D.
Minakami
Minakami is a mountainous town in Gunma Prefecture, Japan, known for its hot springs, outdoor sports, and scenic natural landscapes.
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E.
Minamitane
Minamitane is a town on Tanegashima Island in Kagoshima Prefecture, Japan, known for hosting Japan’s main spaceport facilities nearby.
- 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: Kamioka mine Target entity description: Kamioka mine is a former lead and zinc mine in Japan that now hosts major underground physics laboratories, including the Kamioka Observatory, for neutrino and astroparticle research.
-
A.
Tokai to Kamioka
Tokai to Kamioka is a long-baseline neutrino oscillation experiment in Japan that studies how neutrinos change type as they travel from the J-PARC facility in Tokai to the Super-Kamiokande detector in Kamioka.
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B.
Ikuno Silver Mine
Ikuno Silver Mine is a historic Japanese mining site in Hyōgo Prefecture, known for its former silver production tunnels, industrial heritage, and museum exhibits on mining history.
-
C.
Sado gold mine
The Sado gold mine is a historic and once-prolific gold and silver mine on Sado Island in Niigata Prefecture, Japan, now preserved as a cultural heritage and tourist site.
-
D.
Minakami
Minakami is a mountainous town in Gunma Prefecture, Japan, known for its hot springs, outdoor sports, and scenic natural landscapes.
-
E.
Minamitane
Minamitane is a town on Tanegashima Island in Kagoshima Prefecture, Japan, known for hosting Japan’s main spaceport facilities nearby.
- F. None of above. chosen
Statements (40)
| Predicate | Object |
|---|---|
| instanceOf |
physics research facility
ⓘ
underground mine ⓘ |
| associatedWith |
Institute for Cosmic Ray Research (ICRR)
NERFINISHED
ⓘ
Japanese neutrino physics community NERFINISHED ⓘ University of Tokyo NERFINISHED ⓘ |
| conversion | converted from metal mine to science facility ⓘ |
| country | Japan ⓘ |
| currentUse | underground physics laboratory site ⓘ |
| depth | approximately 1000 meters underground ⓘ |
| formerUse |
lead mine
ⓘ
zinc mine ⓘ |
| hasLaboratory |
KamLAND underground laboratory
NERFINISHED
ⓘ
Super-Kamiokande underground laboratory NERFINISHED ⓘ |
| hosts |
Kamioka Liquid Scintillator Antineutrino Detector (KamLAND)
NERFINISHED
ⓘ
Kamioka Observatory NERFINISHED ⓘ Super-Kamiokande detector NERFINISHED ⓘ astroparticle physics experiments ⓘ neutrino experiments ⓘ |
| locatedIn |
Gifu Prefecture
NERFINISHED
ⓘ
Hida NERFINISHED ⓘ Kamioka, Hida, Gifu Prefecture NERFINISHED ⓘ |
| metalMined |
lead
ⓘ
zinc ⓘ |
| notableFor |
hosting experiments that discovered neutrino oscillations
ⓘ
low-background underground environment ⓘ |
| operatedBy | Mitsui Mining and Smelting Company (historically) NERFINISHED ⓘ |
| partOf | Kamioka Observatory, Institute for Cosmic Ray Research, University of Tokyo NERFINISHED ⓘ |
| region | Hida Mountains NERFINISHED ⓘ |
| scientificDiscipline |
astroparticle physics
ⓘ
cosmic ray physics ⓘ neutrino physics ⓘ |
| shielding | rock overburden reducing cosmic rays ⓘ |
| status | mine closed, laboratories active ⓘ |
| usedFor |
astroparticle research
ⓘ
atmospheric neutrino detection ⓘ neutrino research ⓘ particle physics experiments ⓘ proton decay searches ⓘ reactor antineutrino detection ⓘ solar neutrino detection ⓘ |
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: Kamioka mine Description of subject: Kamioka mine is a former lead and zinc mine in Japan that now hosts major underground physics laboratories, including the Kamioka Observatory, for neutrino and astroparticle research.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Kamioka Observatory