Nakajima Ha-109
E875791
The Nakajima Ha-109 was a Japanese World War II-era aircraft engine, a more powerful development used to improve the performance of several Imperial Japanese Army fighters.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Nakajima Ha-109 canonical | 3 |
| Nakajima Ha-25 | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T10447135 — 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: Nakajima Ha-109 Context triple: [Nakajima Ha-5, successor, Nakajima Ha-109]
-
A.
Nakajima Ha-5
The Nakajima Ha-5 was a Japanese air-cooled radial aircraft engine of the 1930s, used to power several Imperial Japanese Army bombers and transport aircraft before and during World War II.
-
B.
Nakajima Ki-43
The Nakajima Ki-43 was a highly maneuverable Japanese single-engine fighter aircraft of World War II, widely used in the early and mid-war years across multiple Asian and Pacific battlefronts.
-
C.
Nakajima Ki-34
The Nakajima Ki-34 was a Japanese twin-engine light transport aircraft of the 1930s–40s, used primarily by the Imperial Japanese Army for personnel and liaison duties.
-
D.
Nakajima Ki-27
The Nakajima Ki-27 was a Japanese single-engine, fixed-gear fighter aircraft that served as the Imperial Japanese Army’s main frontline fighter in the late 1930s and early World War II.
-
E.
Hitachi Ha-13a
The Hitachi Ha-13a was a Japanese air-cooled inline piston aircraft engine used in light military aircraft of the World War II era.
- 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: Nakajima Ha-109 Target entity description: The Nakajima Ha-109 was a Japanese World War II-era aircraft engine, a more powerful development used to improve the performance of several Imperial Japanese Army fighters.
-
A.
Nakajima Ha-5
The Nakajima Ha-5 was a Japanese air-cooled radial aircraft engine of the 1930s, used to power several Imperial Japanese Army bombers and transport aircraft before and during World War II.
-
B.
Nakajima Ki-43
The Nakajima Ki-43 was a highly maneuverable Japanese single-engine fighter aircraft of World War II, widely used in the early and mid-war years across multiple Asian and Pacific battlefronts.
-
C.
Nakajima Ki-34
The Nakajima Ki-34 was a Japanese twin-engine light transport aircraft of the 1930s–40s, used primarily by the Imperial Japanese Army for personnel and liaison duties.
-
D.
Nakajima Ki-27
The Nakajima Ki-27 was a Japanese single-engine, fixed-gear fighter aircraft that served as the Imperial Japanese Army’s main frontline fighter in the late 1930s and early World War II.
-
E.
Hitachi Ha-13a
The Hitachi Ha-13a was a Japanese air-cooled inline piston aircraft engine used in light military aircraft of the World War II era.
- F. None of above. chosen
Statements (33)
| Predicate | Object |
|---|---|
| instanceOf |
aircraft engine
ⓘ
piston engine ⓘ |
| alsoKnownAs | Army Type 1 1,500 hp Air-cooled Radial Engine ⓘ |
| applicationType | single-engine fighters ⓘ |
| bore | 130 mm ⓘ |
| category | World War II Japanese aircraft engines ⓘ |
| coolingType | air-cooled ⓘ |
| countryOfOrigin | Japan ⓘ |
| cylinderArrangement | two-row ⓘ |
| designFeature |
geared supercharger
ⓘ
two-row radial layout ⓘ |
| developedFrom |
Nakajima Ha-115
ⓘ
Nakajima Ha-25 ⓘ
linked to:
Nakajima Ha-109
|
| displacement | 35.8 L ⓘ |
| engineConfiguration | radial engine ⓘ |
| era |
World War II era
ⓘ
linked to:
World War II
|
| fuelSystem | carbureted ⓘ |
| fuelType | aviation gasoline ⓘ |
| manufacturer | Nakajima Aircraft Company ⓘ |
| numberOfCylinders | 14 ⓘ |
| operator | Imperial Japanese Army Air Service ⓘ |
| powerOutput | 1500 hp class ⓘ |
| purpose | to improve fighter performance ⓘ |
| role | fighter aircraft engine ⓘ |
| serviceEntryPeriod | early 1940s ⓘ |
| stroke | 150 mm ⓘ |
| supercharger |
single-stage
ⓘ
two-speed ⓘ |
| usedBy |
Imperial Japanese Army
ⓘ
Imperial Japanese Army Air Force ⓘ
linked to:
Imperial Japanese Army Air Service
|
| usedInAircraft |
Kawasaki Ki-100 (as basis for conversion from Ha-140 installations)
ⓘ
Kawasaki Ki-61-II ⓘ
linked to:
Kawasaki Ki-61
|
| usedInConflict | World War II ⓘ |
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: Nakajima Ha-109 Description of subject: The Nakajima Ha-109 was a Japanese World War II-era aircraft engine, a more powerful development used to improve the performance of several Imperial Japanese Army fighters.
Referenced by (5)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject linked to:
Nakajima Ha-5 radial engine
subject linked to:
Nakajima Ha-109 radial engine
linked to: Nakajima Ha-109
linked to: Nakajima Ha-109