Operation Z (Pearl Harbor attack plan)
E489685
Operation Z was the Imperial Japanese Navy’s meticulously planned surprise air assault on the U.S. Pacific Fleet at Pearl Harbor in December 1941, intended to cripple American naval power at the outset of the Pacific War.
All labels observed (4)
How this entity was disambiguated
This entity first appeared as the object of triple T5058445 — 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.
Target entity: Operation Z (Pearl Harbor attack plan) Context triple: [Combined Fleet of the Imperial Japanese Navy, notableOperation, Operation Z (Pearl Harbor attack plan)]
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A.
Operation Ichi-Go
Operation Ichi-Go was a major 1944 Japanese military offensive in China during World War II aimed at securing railways, destroying U.S. air bases, and linking Japanese-held territories.
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B.
Operation Ten-Go
Operation Ten-Go was the final major Japanese naval sortie of World War II, a desperate 1945 mission centered on the battleship Yamato’s one-way attack toward Okinawa.
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C.
Operation Chariot
Operation Chariot was a daring British commando raid in March 1942 that successfully crippled the vital Normandie dry dock at the German-occupied port of Saint-Nazaire during World War II.
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D.
Japanese Operation Shō-Gō 1
Japanese Operation Shō-Gō 1 was a major Imperial Japanese Navy plan in late 1944 to mount a decisive counteroffensive against U.S. forces during the Battle of Leyte Gulf in the Pacific War.
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E.
Operation Cerberus
Operation Cerberus was a daring World War II German naval operation in which major warships made a high-speed, heavily defended dash from occupied France through the English Channel back to German ports.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
Target entity: Operation Z (Pearl Harbor attack plan) Target entity description: Operation Z was the Imperial Japanese Navy’s meticulously planned surprise air assault on the U.S. Pacific Fleet at Pearl Harbor in December 1941, intended to cripple American naval power at the outset of the Pacific War.
-
A.
Operation Ichi-Go
Operation Ichi-Go was a major 1944 Japanese military offensive in China during World War II aimed at securing railways, destroying U.S. air bases, and linking Japanese-held territories.
-
B.
Operation Ten-Go
Operation Ten-Go was the final major Japanese naval sortie of World War II, a desperate 1945 mission centered on the battleship Yamato’s one-way attack toward Okinawa.
-
C.
Operation Chariot
Operation Chariot was a daring British commando raid in March 1942 that successfully crippled the vital Normandie dry dock at the German-occupied port of Saint-Nazaire during World War II.
-
D.
Japanese Operation Shō-Gō 1
Japanese Operation Shō-Gō 1 was a major Imperial Japanese Navy plan in late 1944 to mount a decisive counteroffensive against U.S. forces during the Battle of Leyte Gulf in the Pacific War.
-
E.
Operation Cerberus
Operation Cerberus was a daring World War II German naval operation in which major warships made a high-speed, heavily defended dash from occupied France through the English Channel back to German ports.
- F. None of above. chosen
Statements (52)
| Predicate | Object |
|---|---|
| instanceOf |
Japanese military plan
ⓘ
military operation ⓘ naval air operation ⓘ |
| airStrikePlanner | Commander Minoru Genda NERFINISHED ⓘ |
| alsoKnownAs |
Hawaii Operation
NERFINISHED
ⓘ
Hawaiian Operation NERFINISHED ⓘ Pearl Harbor attack plan NERFINISHED ⓘ |
| approvedBy | Imperial General Headquarters NERFINISHED ⓘ |
| belligerent |
Japan
ⓘ
surface form:
Empire of Japan
|
| commandedBy | Admiral Isoroku Yamamoto NERFINISHED ⓘ |
| consequence |
brought the United States into World War II
ⓘ
galvanized American public opinion ⓘ led to U.S. declaration of war on Japan ⓘ |
| countryOfOrigin | Empire of Japan NERFINISHED ⓘ |
| date | 1941-12-07 ⓘ |
| firstWaveObjective | attack battleships and airfields ⓘ |
| hasObjective |
cripple the U.S. Pacific Fleet
ⓘ
secure Japanese freedom of action in Southeast Asia and the Pacific ⓘ |
| historicalSignificance | marked the beginning of large-scale carrier warfare in the Pacific ⓘ |
| includedWaveCount | 2 ⓘ |
| inspiredBy | British attack on Taranto ⓘ |
| intelligencePlanner | Commander Takijiro Onishi NERFINISHED ⓘ |
| involvedAircraftType |
Aichi D3A dive bomber
NERFINISHED
ⓘ
Mitsubishi A6M Zero fighter NERFINISHED ⓘ Nakajima B5N torpedo bomber NERFINISHED ⓘ |
| involvedUnit |
Akagi aircraft carrier
NERFINISHED
ⓘ
First Air Fleet NERFINISHED ⓘ Hiryu aircraft carrier NERFINISHED ⓘ Japanese fleet submarines ⓘ Japanese midget submarines ⓘ Kaga aircraft carrier NERFINISHED ⓘ Shokaku aircraft carrier NERFINISHED ⓘ Soryu aircraft carrier NERFINISHED ⓘ Zuikaku aircraft carrier NERFINISHED ⓘ |
| location | Pearl Harbor, Oahu, Territory of Hawaii, United States NERFINISHED ⓘ |
| navalTaskForceCommander | Vice Admiral Chuichi Nagumo NERFINISHED ⓘ |
| notableFeature |
long-range carrier strike launched in radio silence
ⓘ
use of shallow-water torpedoes modified for Pearl Harbor ⓘ |
| opposedBy | United States NERFINISHED ⓘ |
| partOf |
Pacific War
ⓘ
World War II ⓘ |
| plannedBy | Imperial Japanese Navy NERFINISHED ⓘ |
| preparationStartDate | 1941-01 ⓘ |
| result | tactical Japanese victory ⓘ |
| secondWaveObjective | attack remaining ships and facilities ⓘ |
| tactic |
carrier-based air strike
ⓘ
surprise attack ⓘ two-wave air assault ⓘ |
| targeted |
Pearl Harbor naval base
NERFINISHED
ⓘ
U.S. Army Air Forces airfields on Oahu ⓘ U.S. Pacific Fleet NERFINISHED ⓘ |
| usedForce | Kido Butai (First Air Fleet) NERFINISHED ⓘ |
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.
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.
Subject: Operation Z (Pearl Harbor attack plan) Description of subject: Operation Z was the Imperial Japanese Navy’s meticulously planned surprise air assault on the U.S. Pacific Fleet at Pearl Harbor in December 1941, intended to cripple American naval power at the outset of the Pacific War.
Referenced by (4)
Full triples — surface form annotated when it differs from this entity's canonical label.