Nakajima Ha-5
E844999
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.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Nakajima Ha-25 | 1 |
| Nakajima Ha-5 canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T10148063 — 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-5 Context triple: [Nakajima Ha-1b, successorEngineFamily, Nakajima Ha-5]
-
A.
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.
-
B.
Kawasaki Ki-100
The Kawasaki Ki-100 was a late-World War II Japanese fighter aircraft renowned for its excellent maneuverability and reliability, created by fitting a radial engine to the airframe of the earlier Ki-61.
-
C.
Kawasaki Ha-40
The Kawasaki Ha-40 was a Japanese liquid-cooled V12 aircraft engine, a locally produced development of the German Daimler-Benz DB 601 used in World War II fighters such as the Ki-61.
-
D.
Aichi E13A
The Aichi E13A was a Japanese World War II reconnaissance seaplane widely used by the Imperial Japanese Navy for long-range maritime patrol and observation missions.
-
E.
Nakajima Ki-84
The Nakajima Ki-84 was a late-World War II Japanese single-seat fighter aircraft renowned for its high speed, powerful armament, and effectiveness against Allied fighters and bombers.
- 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-5 Target entity description: 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.
-
A.
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.
-
B.
Kawasaki Ki-100
The Kawasaki Ki-100 was a late-World War II Japanese fighter aircraft renowned for its excellent maneuverability and reliability, created by fitting a radial engine to the airframe of the earlier Ki-61.
-
C.
Kawasaki Ha-40
The Kawasaki Ha-40 was a Japanese liquid-cooled V12 aircraft engine, a locally produced development of the German Daimler-Benz DB 601 used in World War II fighters such as the Ki-61.
-
D.
Aichi E13A
The Aichi E13A was a Japanese World War II reconnaissance seaplane widely used by the Imperial Japanese Navy for long-range maritime patrol and observation missions.
-
E.
Nakajima Ki-84
The Nakajima Ki-84 was a late-World War II Japanese single-seat fighter aircraft renowned for its high speed, powerful armament, and effectiveness against Allied fighters and bombers.
- F. None of above. chosen
Statements (29)
| Predicate | Object |
|---|---|
| instanceOf |
air-cooled engine
ⓘ
aircraft engine ⓘ |
| application |
bomber aircraft
ⓘ
transport aircraft ⓘ |
| category | World War II Japanese aircraft piston engine ⓘ |
| configuration | radial ⓘ |
| coolingSystem | air-cooled ⓘ |
| countryOfOrigin | Japan ⓘ |
| cylinderArrangement | single-row radial ⓘ |
| developedIn | Empire of Japan NERFINISHED ⓘ |
| era | 1930s ⓘ |
| fuelType | aviation gasoline ⓘ |
| ignition | spark-ignition ⓘ |
| manufacturer | Nakajima Aircraft Company NERFINISHED ⓘ |
| notableFeature | reliable early-war bomber powerplant ⓘ |
| numberOfCylinders | 9 ⓘ |
| powerplantRole | primary bomber engine (early war) ⓘ |
| primaryUser | Imperial Japanese Army bomber units ⓘ |
| propulsionType | piston engine ⓘ |
| serviceEntryPeriod | mid-1930s ⓘ |
| successor |
Nakajima Ha-109
NERFINISHED
ⓘ
Nakajima Ha-41 NERFINISHED ⓘ |
| usedBy | Imperial Japanese Army Air Force NERFINISHED ⓘ |
| usedByBranch | Imperial Japanese Army NERFINISHED ⓘ |
| usedInConflict | World War II ⓘ |
| usedOnAircraft |
Mitsubishi Ki-21
NERFINISHED
ⓘ
Nakajima Ki-34 NERFINISHED ⓘ Tachikawa Ki-54 NERFINISHED ⓘ |
| usedUntil | early World War II period ⓘ |
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-5 Description of subject: 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.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Nakajima Ha-1b
subject surface form:
Nakajima Ha-1b
this entity surface form:
Nakajima Ha-25