Marine Corps Air Station Iwakuni
E267037
Marine Corps Air Station Iwakuni is a major United States Marine Corps air base located in Iwakuni, Japan, supporting forward-deployed aviation units and joint U.S.–Japan defense operations.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Marine Corps Air Station Iwakuni canonical | 4 |
How this entity was disambiguated
This entity first appeared as the object of triple T2429562 — 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: Marine Corps Air Station Iwakuni Context triple: [Marine Corps Installations Pacific, responsibleFor, Marine Corps Air Station Iwakuni]
-
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.
Futenma Air Station
Futenma Air Station is a major United States Marine Corps air base located in the densely populated city of Ginowan on Japan’s Okinawa Island, long at the center of local controversy over noise, safety, and the American military presence.
-
C.
Amakusa Airfield
Amakusa Airfield is a regional airport in Kumamoto Prefecture, Japan, serving the Amakusa Islands with domestic flights.
-
D.
Hamamatsu Air Base
Hamamatsu Air Base is a major Japan Air Self-Defense Force installation in Shizuoka Prefecture known for its training units, air defense role, and aviation museum.
-
E.
Komatsu Air Base
Komatsu Air Base is a major military airfield in Ishikawa Prefecture that serves as one of the Japan Air Self-Defense Force’s key fighter and air defense installations.
- 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: Marine Corps Air Station Iwakuni Target entity description: Marine Corps Air Station Iwakuni is a major United States Marine Corps air base located in Iwakuni, Japan, supporting forward-deployed aviation units and joint U.S.–Japan defense operations.
-
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.
Futenma Air Station
Futenma Air Station is a major United States Marine Corps air base located in the densely populated city of Ginowan on Japan’s Okinawa Island, long at the center of local controversy over noise, safety, and the American military presence.
-
C.
Amakusa Airfield
Amakusa Airfield is a regional airport in Kumamoto Prefecture, Japan, serving the Amakusa Islands with domestic flights.
-
D.
Hamamatsu Air Base
Hamamatsu Air Base is a major Japan Air Self-Defense Force installation in Shizuoka Prefecture known for its training units, air defense role, and aviation museum.
-
E.
Komatsu Air Base
Komatsu Air Base is a major military airfield in Ishikawa Prefecture that serves as one of the Japan Air Self-Defense Force’s key fighter and air defense installations.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
United States Marine Corps installation
ⓘ
military air base ⓘ |
| allianceContext |
United States–Japan security alliance
ⓘ
surface form:
U.S.–Japan Security Treaty
|
| controlledBy |
United States Marine Corps
ⓘ
United States military since end of World War II ⓘ |
| coordinates | 34.143°N 132.235°E ⓘ |
| country | Japan ⓘ |
| distanceTo | approximately 40 kilometers south of Hiroshima ⓘ |
| elevationAboveSeaLevel | 7 meters ⓘ |
| garrison |
U.S. Navy carrier air groups
ⓘ
surface form:
Carrier Air Wing 5
Fleet Air Wing 31 (Japan Maritime Self-Defense Force) ⓘ Headquarters and Headquarters Squadron ⓘ Marine Aircraft Group 12 ⓘ Marine Aviation Logistics Squadron ⓘ
surface form:
Marine Aviation Logistics Squadron 12
Marine Wing Support Squadron 171 ⓘ |
| hasFacility |
aircraft maintenance hangars
ⓘ
family housing and community support services ⓘ fuel storage and distribution systems ⓘ ordnance storage areas ⓘ sea-based and land-based aviation support infrastructure ⓘ |
| hasRole |
logistics hub for Marine aviation in Japan
ⓘ
power projection base in Western Pacific ⓘ |
| hosts |
forward-deployed F-35B squadrons
ⓘ
rotational U.S. Navy carrier air wing units ⓘ |
| IATACode | IWK ⓘ |
| ICAOCode | RJOI ⓘ |
| locatedInAdministrativeTerritorialEntity | Yamaguchi Prefecture NERFINISHED ⓘ |
| locatedNear | Seto Inland Sea ⓘ |
| locatedOn | Honshu ⓘ |
| location | Iwakuni, Yamaguchi Prefecture, Japan ⓘ |
| nearbyCity | Iwakuni ⓘ |
| opened | World War II era ⓘ |
| operator | United States Marine Corps ⓘ |
| originallyUsedBy | Imperial Japanese Navy ⓘ |
| partOf |
U.S. Indo-Pacific Command area of responsibility
ⓘ
U.S. Forces Japan ⓘ
surface form:
United States Forces Japan
|
| primaryFunction |
forward-deployed aviation base
ⓘ
support of U.S.–Japan joint defense operations ⓘ |
| runway | 02/20 ⓘ |
| runwayLength | 2440 meters ⓘ |
| runwaySurface | asphalt ⓘ |
| sharedWith | Iwakuni Kintaikyo Airport ⓘ |
| supports |
bilateral training with Japan Self-Defense Forces
ⓘ
expeditionary Marine Air-Ground Task Forces ⓘ |
| timezone | Japan Standard Time ⓘ |
| usedBy |
Japan Air Self-Defense Force
ⓘ
Japan Maritime Self-Defense Force ⓘ United States Marine Corps ⓘ United States Navy ⓘ |
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: Marine Corps Air Station Iwakuni Description of subject: Marine Corps Air Station Iwakuni is a major United States Marine Corps air base located in Iwakuni, Japan, supporting forward-deployed aviation units and joint U.S.–Japan defense operations.
Referenced by (4)
Full triples — surface form annotated when it differs from this entity's canonical label.