Iwo Jima Air Base
E607752
Iwo Jima Air Base is a Japanese military airfield on the island of Iwo Jima, historically significant for its role in World War II and now used primarily by the Japan Self-Defense Forces and the U.S. military.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Iwo Jima Air Base canonical | 3 |
How this entity was disambiguated
This entity first appeared as the object of triple T6612611 — 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: Iwo Jima Air Base Context triple: [Iōjima, hasRunway, Iwo Jima Air Base]
-
A.
Kadena Air Base
Kadena Air Base is a major United States Air Force installation in Japan that serves as a key strategic hub for American military operations in the Asia-Pacific region.
-
B.
Atsugi Air Base
Atsugi Air Base is a major joint Japan-U.S. naval air facility in Kanagawa Prefecture that serves as a key hub for maritime patrol, reconnaissance, and carrier-based aviation operations.
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C.
Yokota Air Base
Yokota Air Base is a major United States Air Force installation in western Tokyo that serves as the primary hub for U.S. military air operations and command in Japan.
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D.
Miho Air Base
Miho Air Base is a Japan Air Self-Defense Force installation in Tottori Prefecture that serves as a key hub for transport and support operations.
-
E.
Osan Air Base
Osan Air Base is a major United States Air Force installation in South Korea that serves as a critical hub for American air operations and deterrence on the Korean Peninsula.
- 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: Iwo Jima Air Base Target entity description: Iwo Jima Air Base is a Japanese military airfield on the island of Iwo Jima, historically significant for its role in World War II and now used primarily by the Japan Self-Defense Forces and the U.S. military.
-
A.
Kadena Air Base
Kadena Air Base is a major United States Air Force installation in Japan that serves as a key strategic hub for American military operations in the Asia-Pacific region.
-
B.
Atsugi Air Base
Atsugi Air Base is a major joint Japan-U.S. naval air facility in Kanagawa Prefecture that serves as a key hub for maritime patrol, reconnaissance, and carrier-based aviation operations.
-
C.
Yokota Air Base
Yokota Air Base is a major United States Air Force installation in western Tokyo that serves as the primary hub for U.S. military air operations and command in Japan.
-
D.
Miho Air Base
Miho Air Base is a Japan Air Self-Defense Force installation in Tottori Prefecture that serves as a key hub for transport and support operations.
-
E.
Osan Air Base
Osan Air Base is a major United States Air Force installation in South Korea that serves as a critical hub for American air operations and deterrence on the Korean Peninsula.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
airfield
ⓘ
military air base ⓘ |
| accessRestriction | not open to the general public ⓘ |
| controlledBy | Japan Ministry of Defense NERFINISHED ⓘ |
| country | Japan ⓘ |
| currentPrimaryUser | Japan Air Self-Defense Force NERFINISHED ⓘ |
| garrison | Japan Air Self-Defense Force detachment NERFINISHED ⓘ |
| hasAlternateName |
Iwo To Air Base
NERFINISHED
ⓘ
Iō-tō Air Base NERFINISHED ⓘ |
| hasElevation |
approximately 112 metres
ⓘ
approximately 368 feet ⓘ |
| hasFunction | support for training ranges around Iwo Jima ⓘ |
| hasIataCode | IWO NERFINISHED ⓘ |
| hasIcaoCode | RJAW NERFINISHED ⓘ |
| hasInfrastructure |
single main runway
ⓘ
support facilities for stationed personnel ⓘ |
| hasRunway | Runway 07/25 NERFINISHED ⓘ |
| hasRunwayLength |
about 2650 metres
ⓘ
about 8700 feet ⓘ |
| hasRunwaySurface | asphalt ⓘ |
| hasType | remote island air base ⓘ |
| historicalUseBy |
Imperial Japanese Army
NERFINISHED
ⓘ
United States Army Air Forces NERFINISHED ⓘ |
| locatedIn |
Ogasawara Islands
NERFINISHED
ⓘ
Tokyo Metropolis NERFINISHED ⓘ |
| locatedInBodyOfWater | Pacific Ocean NERFINISHED ⓘ |
| locatedOn | Iwo Jima NERFINISHED ⓘ |
| near | Mount Suribachi NERFINISHED ⓘ |
| operatedBy | Japan Self-Defense Forces NERFINISHED ⓘ |
| partOf | Japan Self-Defense Forces base network NERFINISHED ⓘ |
| postwarStatus |
later returned to Japan
ⓘ
retained by United States after World War II ⓘ |
| runwayOrientation |
070 degrees
ⓘ
250 degrees ⓘ |
| significantEvent | Battle of Iwo Jima NERFINISHED ⓘ |
| strategicRole | emergency landing field for B-29 bombers in World War II ⓘ |
| timezone | Japan Standard Time NERFINISHED ⓘ |
| usedBy |
Japan Air Self-Defense Force
NERFINISHED
ⓘ
United States Air Force ⓘ United States Marine Corps ⓘ United States Navy ⓘ United States military NERFINISHED ⓘ |
| usedDuringConflict | World War II NERFINISHED ⓘ |
| usedFor |
US carrier landing practice (historically and/or periodically)
ⓘ
aircraft exercises ⓘ emergency landings ⓘ joint US-Japan military operations ⓘ military training ⓘ |
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: Iwo Jima Air Base Description of subject: Iwo Jima Air Base is a Japanese military airfield on the island of Iwo Jima, historically significant for its role in World War II and now used primarily by the Japan Self-Defense Forces and the U.S. military.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.