Iruma, Saitama, Japan
E425127
Iruma is a city in Saitama Prefecture, Japan, known for its Sayama tea production and suburban residential character within the Greater Tokyo area.
All labels observed (3)
| Label | Occurrences |
|---|---|
| Iruma, Saitama | 1 |
| Iruma, Saitama Prefecture | 1 |
| Iruma, Saitama, Japan canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T4214774 — 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: Iruma, Saitama, Japan Context triple: [Tsukuba, hasSisterCity, Iruma, Saitama, Japan]
-
A.
Sayama, Saitama, Japan
Sayama is a city in Saitama Prefecture, Japan, known for its automotive manufacturing facilities and proximity to the Tokyo metropolitan area.
-
B.
Saitama Prefecture, Japan
Saitama Prefecture, Japan is a populous prefecture in the Kantō region just north of Tokyo, known for its role as a major residential and commercial hub as well as for hosting key national institutions.
-
C.
Asaka, Saitama
Asaka is a suburban city in Saitama Prefecture, Japan, located in the Greater Tokyo metropolitan area and known primarily as a residential and commuter town.
-
D.
Utsunomiya, Tochigi Prefecture, Japan
Utsunomiya is the capital city of Tochigi Prefecture in Japan, known for its gyoza (dumplings) and as a regional commercial and transportation hub north of Tokyo.
-
E.
Kawagoe, Saitama, Japan
Kawagoe is a historic city in Saitama Prefecture, Japan, known for its well-preserved Edo-period warehouse district and traditional streetscapes that have earned it the nickname "Little Edo."
- 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: Iruma, Saitama, Japan Target entity description: Iruma is a city in Saitama Prefecture, Japan, known for its Sayama tea production and suburban residential character within the Greater Tokyo area.
-
A.
Sayama, Saitama, Japan
Sayama is a city in Saitama Prefecture, Japan, known for its automotive manufacturing facilities and proximity to the Tokyo metropolitan area.
-
B.
Saitama Prefecture, Japan
Saitama Prefecture, Japan is a populous prefecture in the Kantō region just north of Tokyo, known for its role as a major residential and commercial hub as well as for hosting key national institutions.
-
C.
Asaka, Saitama
Asaka is a suburban city in Saitama Prefecture, Japan, located in the Greater Tokyo metropolitan area and known primarily as a residential and commuter town.
-
D.
Utsunomiya, Tochigi Prefecture, Japan
Utsunomiya is the capital city of Tochigi Prefecture in Japan, known for its gyoza (dumplings) and as a regional commercial and transportation hub north of Tokyo.
-
E.
Kawagoe, Saitama, Japan
Kawagoe is a historic city in Saitama Prefecture, Japan, known for its well-preserved Edo-period warehouse district and traditional streetscapes that have earned it the nickname "Little Edo."
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf | city ⓘ |
| adjacentTo |
Hannō, Saitama
NERFINISHED
ⓘ
Hidaka, Saitama NERFINISHED ⓘ Miyoshi, Saitama NERFINISHED ⓘ Moroyama, Saitama NERFINISHED ⓘ Ogose, Saitama NERFINISHED ⓘ Sayama, Saitama NERFINISHED ⓘ Tokorozawa, Saitama NERFINISHED ⓘ |
| administrativeDivisionLevel | municipality ⓘ |
| belongsTo | Saitama Prefecture municipalities ⓘ |
| climate | humid subtropical climate ⓘ |
| country | Japan ⓘ |
| governingBody | Iruma city government NERFINISHED ⓘ |
| hasAgriculturalProduct | Sayama tea NERFINISHED ⓘ |
| hasAreaCodeSystem | Japanese telephone numbering plan ⓘ |
| hasContinent | Asia NERFINISHED ⓘ |
| hasCulturalAssociation | Sayama tea brand NERFINISHED ⓘ |
| hasEconomicRole |
bedroom community for Tokyo
ⓘ
regional commercial center ⓘ |
| hasFacility | Iruma Air Base NERFINISHED ⓘ |
| hasJapaneseName | 入間市 NERFINISHED ⓘ |
| hasLandUse |
commercial zones
ⓘ
light industrial zones ⓘ residential areas ⓘ tea fields ⓘ |
| hasLanguage | Japanese ⓘ |
| hasMayor | mayor of Iruma ⓘ |
| hasMunicipalStatus | city ⓘ |
| hasPostalSystem | Japanese postal system ⓘ |
| hasPrimaryIndustry |
light manufacturing
ⓘ
retail and services ⓘ tea cultivation ⓘ |
| hasRegionType | suburban ⓘ |
| hasRoad |
Ken-Ō Expressway vicinity
ⓘ
National Route 16 NERFINISHED ⓘ |
| hasSettlementType | city ⓘ |
| hasTransport |
JR Hachikō Line
NERFINISHED
ⓘ
Seibu Ikebukuro Line NERFINISHED ⓘ |
| knownFor |
Sayama tea production
ⓘ
being a commuter city for Tokyo ⓘ suburban residential character ⓘ |
| locatedIn |
Kantō region
ⓘ
Saitama Prefecture NERFINISHED ⓘ |
| locatedOn | Honshu ⓘ |
| partOf | Greater Tokyo Area NERFINISHED ⓘ |
| timezone | Japan Standard Time NERFINISHED ⓘ |
| utcOffset | +9 ⓘ |
| writingSystem | Japanese writing system ⓘ |
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: Iruma, Saitama, Japan Description of subject: Iruma is a city in Saitama Prefecture, Japan, known for its Sayama tea production and suburban residential character within the Greater Tokyo area.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Tsukuba
this entity surface form:
Iruma, Saitama Prefecture
this entity surface form:
Iruma, Saitama