Kamioka Observatory, Gifu Prefecture, Japan

E190918

neutrino observatory underground physics research facility

Kamioka Observatory in Gifu Prefecture, Japan is a world-renowned underground physics research facility best known for its neutrino detection experiments such as Super-Kamiokande.

Try in SPARQL Jump to: Surface forms Disambiguation Statements Elicitation Referenced by

All labels observed (6)

Label	Occurrences
Kamioka Observatory	3
Kamioka	2
Kamioka Observatory, Gifu Prefecture, Japan canonical	1
Kamioka Underground Observatory	1
Kamioka, Gifu, Japan	1
Super-Kamiokande	1

How this entity was disambiguated

This entity first appeared as the object of triple T1690132 — 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 Observatory, Gifu Prefecture, Japan
Context triple: [Masatoshi Koshiba, workLocation, Kamioka Observatory, Gifu Prefecture, Japan]

A. Kashiwazaki, Niigata Prefecture, Japan
Kashiwazaki is a coastal city in Niigata Prefecture, Japan, known for its role in regional industry and as the site of one of the world’s largest nuclear power stations.
B. Nagaoka, Niigata, Japan
Nagaoka is a city in Niigata Prefecture, Japan, known for its historic role in the Boshin War, its postwar reconstruction, and one of Japan’s most famous summer fireworks festivals.
C. Tsukuba, Ibaraki Prefecture, Japan
Tsukuba, in Ibaraki Prefecture, Japan, is a planned science city renowned as a major hub for research institutions and advanced technology development.
D. Omihachiman, Japan
Omihachiman is a historic city in Shiga Prefecture, Japan, known for its preserved merchant quarters, canals, and traditional architecture along the eastern shore of Lake Biwa.
E. Tsuyama, Japan
Tsuyama, Japan is a historic city in Okayama Prefecture known for its well-preserved castle ruins, traditional townscape, and famous cherry blossom viewing spots.
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 Observatory, Gifu Prefecture, Japan
Target entity description: Kamioka Observatory in Gifu Prefecture, Japan is a world-renowned underground physics research facility best known for its neutrino detection experiments such as Super-Kamiokande.

A. Kashiwazaki, Niigata Prefecture, Japan
Kashiwazaki is a coastal city in Niigata Prefecture, Japan, known for its role in regional industry and as the site of one of the world’s largest nuclear power stations.
B. Nagaoka, Niigata, Japan
Nagaoka is a city in Niigata Prefecture, Japan, known for its historic role in the Boshin War, its postwar reconstruction, and one of Japan’s most famous summer fireworks festivals.
C. Tsukuba, Ibaraki Prefecture, Japan
Tsukuba, in Ibaraki Prefecture, Japan, is a planned science city renowned as a major hub for research institutions and advanced technology development.
D. Omihachiman, Japan
Omihachiman is a historic city in Shiga Prefecture, Japan, known for its preserved merchant quarters, canals, and traditional architecture along the eastern shore of Lake Biwa.
E. Tsuyama, Japan
Tsuyama, Japan is a historic city in Okayama Prefecture known for its well-preserved castle ruins, traditional townscape, and famous cherry blossom viewing spots.
F. None of above. chosen

Statements (49)

Predicate	Object
instanceOf	neutrino observatory ⓘ underground physics research facility ⓘ
affiliatedWith	University of Tokyo ⓘ
alsoKnownAs	Kamioka Underground Observatory ⓘ linked to: Kamioka Observatory, Gifu Prefecture, Japan
contributedTo	discovery of neutrino oscillations ⓘ
country	Japan ⓘ
depthBelowSurface	about 1000 meters ⓘ
environment	low-background underground laboratory ⓘ
fieldOfResearch	astroparticle physics ⓘ cosmic rays ⓘ gravitational waves ⓘ neutrino physics ⓘ
hasDetectorType	laser interferometer gravitational-wave detector ⓘ liquid scintillator detector ⓘ water Cherenkov detector ⓘ
hasExperiment	CANDLES ⓘ KAGRA ⓘ linked to: KAGRA gravitational-wave detector KamLAND ⓘ linked to: KamLAND experiment Kamiokande ⓘ linked to: Kamiokande experiment NEWAGE ⓘ Super-Kamiokande ⓘ linked to: Kamiokande experiment XMASS ⓘ
hostedNobelPrizeRelatedWorkOf	Masatoshi Koshiba ⓘ Takaaki Kajita ⓘ
knownFor	KAGRA gravitational-wave detector ⓘ KamLAND experiment ⓘ Kamiokande experiment ⓘ Super-Kamiokande experiment ⓘ linked to: Super-Kamiokande Collaboration atmospheric neutrino observations ⓘ neutrino detection experiments ⓘ neutrino oscillation studies ⓘ solar neutrino observations ⓘ
languageOfName	Japanese ⓘ
locatedIn	Chūbu region ⓘ Gifu Prefecture NERFINISHED ⓘ Hida ⓘ linked to: Hida Mountains Honshu ⓘ Japan ⓘ Kamioka ⓘ linked to: Kamioka Observatory, Gifu Prefecture, Japan
locatedInStructure	Kamioka mine ⓘ
operatedBy	Institute for Cosmic Ray Research, University of Tokyo ⓘ linked to: Institute for Cosmic Ray Research
overburden	about 2700 meters water equivalent ⓘ
partOf	Institute for Cosmic Ray Research facilities ⓘ linked to: Institute for Cosmic Ray Research
purpose	detection of rare particle interactions ⓘ
shieldingMaterial	rock overburden ⓘ
usedFor	geoneutrino observations ⓘ proton decay searches ⓘ reactor neutrino measurements ⓘ supernova neutrino detection ⓘ

How these facts were elicited