Kōtetsu
E449204
Kōtetsu was an ironclad warship of the Imperial Japanese Navy that played a decisive role in ending the Boshin War and symbolized Japan’s early naval modernization.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Kōtetsu canonical | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T3843426 — 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: Kōtetsu Context triple: [Naval Battle of Hakodate, shipInvolved, Kōtetsu]
-
A.
Nankai Electric Railway
Nankai Electric Railway is a major private railway company in Japan’s Kansai region, operating key commuter and interurban lines connecting Osaka with Wakayama and Kansai International Airport.
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B.
Osaka Metro
Osaka Metro is the rapid transit network serving Japan’s city of Osaka and its surrounding urban area.
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C.
JR Saikyo Line
The JR Saikyo Line is a major commuter rail line in the Tokyo metropolitan area operated by JR East, connecting central Tokyo with Saitama Prefecture and serving key hubs such as Shibuya and Shinjuku.
-
D.
Seibu Railway
Seibu Railway is a major private railway operator in the Greater Tokyo area of Japan, running extensive commuter and interurban train services across Tokyo and Saitama.
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E.
Tobu Railway
Tobu Railway is a major private railway company in Japan that operates extensive rail networks in the Greater Tokyo area and surrounding regions.
- 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: Kōtetsu Target entity description: Kōtetsu was an ironclad warship of the Imperial Japanese Navy that played a decisive role in ending the Boshin War and symbolized Japan’s early naval modernization.
-
A.
Nankai Electric Railway
Nankai Electric Railway is a major private railway company in Japan’s Kansai region, operating key commuter and interurban lines connecting Osaka with Wakayama and Kansai International Airport.
-
B.
Osaka Metro
Osaka Metro is the rapid transit network serving Japan’s city of Osaka and its surrounding urban area.
-
C.
JR Saikyo Line
The JR Saikyo Line is a major commuter rail line in the Tokyo metropolitan area operated by JR East, connecting central Tokyo with Saitama Prefecture and serving key hubs such as Shibuya and Shinjuku.
-
D.
Seibu Railway
Seibu Railway is a major private railway operator in the Greater Tokyo area of Japan, running extensive commuter and interurban train services across Tokyo and Saitama.
-
E.
Tobu Railway
Tobu Railway is a major private railway company in Japan that operates extensive rail networks in the Greater Tokyo area and surrounding regions.
- F. None of above. chosen
Statements (30)
| Predicate | Object |
|---|---|
| instanceOf |
ironclad warship
ⓘ
steam-powered warship ⓘ warship of the Imperial Japanese Navy ⓘ |
| armourType | ironclad armour ⓘ |
| associatedWith |
centralization of imperial authority in Japan
ⓘ
modernization of the Imperial Japanese Navy ⓘ |
| conflict | Boshin War ⓘ |
| constructionMaterial | iron and wood ⓘ |
| country |
Empire of Japan
ⓘ
linked to:
Japan
|
| era | 19th century ⓘ |
| hasFeature |
armoured hull
ⓘ
heavy naval guns ⓘ steam propulsion ⓘ |
| historicalPeriod |
Meiji Restoration era
ⓘ
linked to:
Meiji Restoration
|
| hullMaterial | iron ⓘ |
| legacy | early example of Japan adopting Western naval technology ⓘ |
| navalTechnologyStage | transition from wooden sailing ships to armoured steam warships ⓘ |
| notableFor |
being among Japan’s first modern armoured warships
ⓘ
impact on outcome of the Boshin War ⓘ |
| operator | Imperial Japanese Navy ⓘ |
| propulsion | steam engine ⓘ |
| roleInConflict | decisive role in ending the Boshin War ⓘ |
| serviceBranch |
Japanese Navy
ⓘ
linked to:
Imperial Japanese Navy
|
| shipType |
armoured corvette
ⓘ
ironclad corvette ⓘ |
| strategicImportance | strengthened imperial control of sea lanes during the Boshin War ⓘ |
| symbolOf | Japan’s early naval modernization ⓘ |
| theaterOfOperations | Japanese coastal waters ⓘ |
| typeOfArmament | naval artillery ⓘ |
| usedBy |
Imperial Japanese forces
ⓘ
linked to:
Armed Forces of the Empire of Japan
|
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: Kōtetsu Description of subject: Kōtetsu was an ironclad warship of the Imperial Japanese Navy that played a decisive role in ending the Boshin War and symbolized Japan’s early naval modernization.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.