Japanese battleship Nagato
E54907
The Japanese battleship Nagato was a World War II-era capital ship of the Imperial Japanese Navy, famed as Admiral Isoroku Yamamoto’s flagship during the attack on Pearl Harbor and later used as a target in postwar nuclear tests.
All labels observed (4)
| Label | Occurrences |
|---|---|
| Japanese battleship Nagato canonical | 4 |
| battleship Nagato | 4 |
| Nagato-class battleship | 2 |
| Battleship Nagato | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T397165 — 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: Japanese battleship Nagato Context triple: [Operation Crossroads, includedShip, Japanese battleship Nagato]
-
A.
Japanese battleship Mutsu
Japanese battleship Mutsu was a Nagato-class dreadnought of the Imperial Japanese Navy, notable for its powerful 16-inch guns and its accidental magazine explosion and sinking in 1943.
-
B.
IJN battleship Yamashiro
IJN battleship Yamashiro was a Japanese Fuso-class dreadnought battleship that served in the Imperial Japanese Navy and was sunk during the Battle of Surigao Strait in World War II.
-
C.
Kaga
Kaga was a Japanese aircraft carrier of the Imperial Japanese Navy that played a major role in early Pacific War operations before being sunk at the Battle of Midway in 1942.
-
D.
IJN cruiser Naka
IJN cruiser Naka was a Sendai-class light cruiser of the Imperial Japanese Navy that served as a destroyer flotilla leader in the Pacific War before being sunk by U.S. carrier aircraft in 1944.
-
E.
Sōryū
Sōryū was a Japanese aircraft carrier of the Imperial Japanese Navy that played a major role in early Pacific War operations before being sunk during World War II.
- 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: Japanese battleship Nagato Target entity description: The Japanese battleship Nagato was a World War II-era capital ship of the Imperial Japanese Navy, famed as Admiral Isoroku Yamamoto’s flagship during the attack on Pearl Harbor and later used as a target in postwar nuclear tests.
-
A.
Japanese battleship Mutsu
Japanese battleship Mutsu was a Nagato-class dreadnought of the Imperial Japanese Navy, notable for its powerful 16-inch guns and its accidental magazine explosion and sinking in 1943.
-
B.
IJN battleship Yamashiro
IJN battleship Yamashiro was a Japanese Fuso-class dreadnought battleship that served in the Imperial Japanese Navy and was sunk during the Battle of Surigao Strait in World War II.
-
C.
Kaga
Kaga was a Japanese aircraft carrier of the Imperial Japanese Navy that played a major role in early Pacific War operations before being sunk at the Battle of Midway in 1942.
-
D.
IJN cruiser Naka
IJN cruiser Naka was a Sendai-class light cruiser of the Imperial Japanese Navy that served as a destroyer flotilla leader in the Pacific War before being sunk by U.S. carrier aircraft in 1944.
-
E.
Sōryū
Sōryū was a Japanese aircraft carrier of the Imperial Japanese Navy that played a major role in early Pacific War operations before being sunk during World War II.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
battleship
ⓘ
capital ship ⓘ warship ⓘ |
| airDefence | equipped with multiple anti-aircraft guns ⓘ |
| armourBeltThickness | up to about 305 mm ⓘ |
| armourDeckThickness | up to about 70 mm ⓘ |
| beam | approximately 29 m ⓘ |
| builder | Kure Naval Arsenal ⓘ |
| capturedBy | United States Navy ⓘ |
| commissioned | 1920-11-25 ⓘ |
| countryOfOrigin | Japan ⓘ |
| crewComplement | around 1,300 officers and men (wartime) ⓘ |
| displacementFullLoad | about 39,000 tons ⓘ |
| displacementStandard | about 32,000 tons ⓘ |
| era | World War II ⓘ |
| fate | sunk as a result of nuclear tests at Bikini Atoll ⓘ |
| finalLocation |
Bikini Atoll
ⓘ
surface form:
Bikini Atoll lagoon
|
| flagshipOf |
Isoroku Yamamoto
ⓘ
surface form:
Admiral Isoroku Yamamoto
|
| homePort |
Yokosuka
ⓘ
surface form:
Yokosuka Naval District
|
| laidDown | 1917-08-28 ⓘ |
| launched | 1919-11-09 ⓘ |
| leadShipOfClass |
Japanese battleship Nagato
self-linksurface differs
ⓘ
surface form:
Nagato-class battleship
|
| length | approximately 215.8 m ⓘ |
| mainBattery | 8 × 410 mm guns ⓘ |
| mainBatteryConfiguration | 4 twin turrets ⓘ |
| maximumSpeed | about 26.5 knots ⓘ |
| modernizationDetails | improved armour, machinery, and superstructure ⓘ |
| modernized | 1930s ⓘ |
| namedAfter | Nagato Province ⓘ |
| notableEvent | served as Yamamoto’s flagship during planning and execution of the attack on Pearl Harbor ⓘ |
| notableFeature |
among the first battleships armed with 410 mm (16.1 in) guns
ⓘ
symbol of Imperial Japanese naval power in the interwar period ⓘ |
| nuclearTestExposure |
Operation Hardtack I
ⓘ
surface form:
Test Able (air burst)
Test Baker (underwater) ⓘ |
| operator | Imperial Japanese Navy ⓘ |
| participatedIn |
Battle of Leyte Gulf
ⓘ
surface form:
Battle of Leyte Gulf (as part of the Japanese fleet)
Battle of Midway ⓘ
surface form:
Battle of Midway (as part of the supporting force)
Battle of the Philippine Sea (as part of the Japanese fleet) ⓘ World War II ⓘ |
| postwarUse | target ship for nuclear tests ⓘ |
| propulsion | steam turbines ⓘ |
| roleAtPearlHarbor | flagship of the Combined Fleet ⓘ |
| secondaryBattery | 140 mm guns ⓘ |
| shipClass |
Japanese battleship Nagato
self-linksurface differs
ⓘ
surface form:
Nagato-class battleship
|
| statusLateWar | largely inactive due to fuel shortages ⓘ |
| sunk | 1946-07-29 ⓘ |
| testSite | Bikini Atoll ⓘ |
| usedIn | Operation Crossroads ⓘ |
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: Japanese battleship Nagato Description of subject: The Japanese battleship Nagato was a World War II-era capital ship of the Imperial Japanese Navy, famed as Admiral Isoroku Yamamoto’s flagship during the attack on Pearl Harbor and later used as a target in postwar nuclear tests.
Referenced by (11)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Second Fleet (Imperial Japanese Navy)
this entity surface form:
battleship Nagato
this entity surface form:
Battleship Nagato
this entity surface form:
Nagato-class battleship
Japanese battleship Nagato
→
leadShipOfClass
→
Japanese battleship Nagato
self-linksurface differs
ⓘ
this entity surface form:
Nagato-class battleship
subject surface form:
Takeo Kurita
this entity surface form:
battleship Nagato
this entity surface form:
battleship Nagato
this entity surface form:
battleship Nagato