Nagaoka-kyō
E525046
Nagaoka-kyō was an ancient Japanese imperial capital established in the late 8th century, serving briefly as the political center before the court moved to Heian-kyō (Kyoto).
All labels observed (3)
| Label | Occurrences |
|---|---|
| Nagaoka-kyō canonical | 12 |
| Nagaoka-kyo | 1 |
| Nagaoka-kyō (later capital) | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T3844998 — 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: Nagaoka-kyō Context triple: [Emperor Kanmu, capitalRelocation, Nagaoka-kyō]
-
A.
Kawagoe
Kawagoe is a historic Japanese city in Saitama Prefecture, often called "Little Edo" for its well-preserved Edo-period streetscapes and traditional warehouses.
-
B.
Kameoka
Kameoka is a city in Kyoto Prefecture, Japan, known for its rural landscapes, historical sites, and proximity to Kyoto.
-
C.
Kyotanabe
Kyotanabe is a city in Kyoto Prefecture, Japan, known for its residential suburbs, educational institutions, and location within the Kansai region.
-
D.
Kakamigahara
Kakamigahara is a city in Gifu Prefecture, Japan, known for its aerospace industry, manufacturing, and proximity to Nagoya.
-
E.
Kasuga
Kasuga was a Japanese warship active in the late 19th century, notably serving in the Boshin War as part of the modern Imperial forces.
- 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: Nagaoka-kyō Target entity description: Nagaoka-kyō was an ancient Japanese imperial capital established in the late 8th century, serving briefly as the political center before the court moved to Heian-kyō (Kyoto).
-
A.
Kawagoe
Kawagoe is a historic Japanese city in Saitama Prefecture, often called "Little Edo" for its well-preserved Edo-period streetscapes and traditional warehouses.
-
B.
Kameoka
Kameoka is a city in Kyoto Prefecture, Japan, known for its rural landscapes, historical sites, and proximity to Kyoto.
-
C.
Kyotanabe
Kyotanabe is a city in Kyoto Prefecture, Japan, known for its residential suburbs, educational institutions, and location within the Kansai region.
-
D.
Kakamigahara
Kakamigahara is a city in Gifu Prefecture, Japan, known for its aerospace industry, manufacturing, and proximity to Nagoya.
-
E.
Kasuga
Kasuga was a Japanese warship active in the late 19th century, notably serving in the Boshin War as part of the modern Imperial forces.
- F. None of above. chosen
Statements (45)
| Predicate | Object |
|---|---|
| instanceOf |
former capital city
ⓘ
historical settlement ⓘ |
| abandonmentReason |
flooding and other environmental problems
ⓘ
political troubles at court ⓘ |
| archaeologicalExcavationsStart | 20th century ⓘ |
| archaeologicalSite | yes ⓘ |
| associatedWith |
Emperor Kanmu
ⓘ
transition from Nara to Heian period ⓘ |
| capitalMoveToHeian-kyō | 794 ⓘ |
| capitalOf | Japan ⓘ |
| capitalPeriodEnd | 794 ⓘ |
| capitalPeriodStart | 784 ⓘ |
| country | Japan ⓘ |
| era |
Nara period
ⓘ
early Heian period ⓘ |
| establishedAsCapital | 784 ⓘ |
| foundedBy | Emperor Kanmu ⓘ |
| function |
imperial residence site
ⓘ
political center of Japan ⓘ |
| governmentType | imperial court ⓘ |
| hasPart |
administrative quarter
ⓘ
ceremonial precincts ⓘ imperial palace ⓘ |
| heritageStatus | important archaeological site of Japan ⓘ |
| historicalRole | intermediate capital between Heijō-kyō and Heian-kyō ⓘ |
| influencedBy | Chinese capital city planning ⓘ |
| languageOfName | Japanese ⓘ |
| locatedIn | Yamashiro Province ⓘ |
| locatedInPresentDay | Kyoto Prefecture ⓘ |
| locatedNear | Kyoto ⓘ |
| locatedOn | alluvial plain ⓘ |
| modernMunicipalityOverlap |
Muko, Kyoto Prefecture
ⓘ
Nagaokakyō, Kyoto Prefecture ⓘ
linked to:
Nagaokakyo
|
| nameMeaning | capital of Nagaoka ⓘ |
| nearRiver |
Katsura River
ⓘ
Yodo River ⓘ |
| precededBy |
Heijō-kyō
ⓘ
linked to:
Heijō Palace
|
| reasonForRelocation | search for more favorable political and geographical conditions ⓘ |
| region | Kansai region ⓘ |
| replacedBy |
Heian-kyō
ⓘ
linked to:
Kyoto
|
| replacedCapital |
Heijō-kyō
ⓘ
linked to:
Heijō Palace
|
| scriptOfHistoricalName | classical Chinese characters ⓘ |
| succeededBy |
Heian-kyō
ⓘ
linked to:
Kyoto
|
| timeInUseAsCapital | about 10 years ⓘ |
| urbanPlanType | grid plan ⓘ |
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: Nagaoka-kyō Description of subject: Nagaoka-kyō was an ancient Japanese imperial capital established in the late 8th century, serving briefly as the political center before the court moved to Heian-kyō (Kyoto).
Referenced by (14)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject linked to:
Imperial court of Japan (historically)
linked to: Nagaoka-kyō
linked to: Nagaoka-kyō