Sado gold mine
E530924
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.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Sado gold mine canonical | 5 |
| Sado gold and silver mining region | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T5571524 — 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: Sado gold mine Context triple: [Sado, Niigata, Japan, knownFor, Sado gold mine]
-
A.
Geita Gold Mine
Geita Gold Mine is one of Tanzania’s largest open-pit gold mines, operated by AngloGold Ashanti and located near the town of Geita in the country’s northwest.
-
B.
Haile Gold Mine
Haile Gold Mine is a historic and still-active gold mining operation in the southeastern United States, known as one of the nation’s oldest and most productive gold mines.
-
C.
Santa Bárbara mine
Santa Bárbara mine is a historic mercury mine near Huancavelica in Peru, once one of the most important sources of mercury for Spanish colonial silver mining.
-
D.
Falun Copper Mine
Falun Copper Mine is a historic Swedish mining site in Dalarna, once one of Europe’s most important copper producers and now preserved as a UNESCO World Heritage Site.
-
E.
Panguna mine
Panguna mine is a large, now-closed open-cut copper and gold mine in Papua New Guinea that was once among the world’s biggest and played a central role in the Bougainville conflict.
- 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: Sado gold mine Target entity description: 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.
-
A.
Geita Gold Mine
Geita Gold Mine is one of Tanzania’s largest open-pit gold mines, operated by AngloGold Ashanti and located near the town of Geita in the country’s northwest.
-
B.
Haile Gold Mine
Haile Gold Mine is a historic and still-active gold mining operation in the southeastern United States, known as one of the nation’s oldest and most productive gold mines.
-
C.
Santa Bárbara mine
Santa Bárbara mine is a historic mercury mine near Huancavelica in Peru, once one of the most important sources of mercury for Spanish colonial silver mining.
-
D.
Falun Copper Mine
Falun Copper Mine is a historic Swedish mining site in Dalarna, once one of Europe’s most important copper producers and now preserved as a UNESCO World Heritage Site.
-
E.
Panguna mine
Panguna mine is a large, now-closed open-cut copper and gold mine in Papua New Guinea that was once among the world’s biggest and played a central role in the Bougainville conflict.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
gold mine
ⓘ
historic site ⓘ silver mine ⓘ |
| annualGoldProductionAtPeak | several tons ⓘ |
| country | Japan ⓘ |
| discoveredIn |
1600s
ⓘ
early 17th century ⓘ |
| endOfOperation |
1989
ⓘ
20th century ⓘ |
| era |
Edo period
ⓘ
Meiji period ⓘ
linked to:
Meiji era
Shōwa period ⓘ
linked to:
Showa era
Taishō period ⓘ
linked to:
Taisho era
|
| hasFeature |
Dōyū-no-Wareto (split mountain) open-pit
ⓘ
historic mining equipment displays ⓘ ore processing facilities ⓘ underground tunnels ⓘ wax figure dioramas of miners ⓘ |
| heritageStatus |
Important Cultural Landscape (Japan)
ⓘ
linked to:
Important Cultural Landscape of Japan
designated cultural property of Japan ⓘ industrial heritage site ⓘ |
| languageOfOfficialSignage |
English
ⓘ
Japanese ⓘ |
| locatedIn |
Chūbu region
ⓘ
Honshu (offshore island) ⓘ Niigata Prefecture ⓘ Sado Island ⓘ Sea of Japan ⓘ |
| managedBy | Sado City ⓘ |
| near | Aikawa area of Sado Island ⓘ |
| operatedBy |
Edo bakufu
ⓘ
linked to:
Tokugawa shogunate
Tokugawa shogunate ⓘ |
| ownedBy | Tokugawa shogunate ⓘ |
| peakProductionPeriod | Edo period ⓘ |
| produced |
copper
ⓘ
gold ⓘ silver ⓘ |
| significance |
major source of revenue for the Tokugawa shogunate
ⓘ
one of Japan's most productive gold mines in the Edo period ⓘ |
| startOfOperation |
17th century
ⓘ
early Edo period ⓘ |
| technologyUsed |
Western-style mining technology (Meiji period onward)
ⓘ
traditional Japanese mining techniques ⓘ |
| tourism |
features restored mining facilities
ⓘ
offers underground mine tours ⓘ open to the public as a museum ⓘ |
| UNESCOStatus |
on UNESCO World Heritage Tentative List
ⓘ
proposed UNESCO World Heritage Site ⓘ |
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: Sado gold mine Description of subject: 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.
Referenced by (6)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Sado gold mine