Uraga Channel
E195824
Uraga Channel is the strait at the mouth of Tokyo Bay that serves as a key maritime gateway between the bay and the open Pacific Ocean.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Uraga Channel canonical | 4 |
| 浦賀水道 | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T1279069 — 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: Uraga Channel Context triple: [Tokyo Bay, connectedTo, Uraga Channel]
-
A.
Tsugaru Strait
The Tsugaru Strait is a narrow body of water separating Japan’s Honshu and Hokkaido islands, serving as a key maritime passage between the Sea of Japan and the Pacific Ocean.
-
B.
Kanmon Straits
Kanmon Straits is a narrow sea passage in southwestern Japan that separates the islands of Honshu and Kyushu and serves as an important shipping and transportation route.
-
C.
Nemuro Strait
Nemuro Strait is a narrow body of water separating Japan’s Hokkaido from the southern Kuril Islands, known for its rich marine life and geopolitical significance.
-
D.
Tokara Strait
Tokara Strait is a body of water in southern Japan that separates the Tokara Islands from the Amami Islands, forming part of the boundary between the East China Sea and the Pacific Ocean.
-
E.
Sōya Strait
Sōya Strait is the narrow sea passage between Japan’s Hokkaido and Russia’s Sakhalin Island, serving as a key shipping route connecting the Sea of Japan with the Sea of Okhotsk.
- 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: Uraga Channel Target entity description: Uraga Channel is the strait at the mouth of Tokyo Bay that serves as a key maritime gateway between the bay and the open Pacific Ocean.
-
A.
Tsugaru Strait
The Tsugaru Strait is a narrow body of water separating Japan’s Honshu and Hokkaido islands, serving as a key maritime passage between the Sea of Japan and the Pacific Ocean.
-
B.
Kanmon Straits
Kanmon Straits is a narrow sea passage in southwestern Japan that separates the islands of Honshu and Kyushu and serves as an important shipping and transportation route.
-
C.
Nemuro Strait
Nemuro Strait is a narrow body of water separating Japan’s Hokkaido from the southern Kuril Islands, known for its rich marine life and geopolitical significance.
-
D.
Tokara Strait
Tokara Strait is a body of water in southern Japan that separates the Tokara Islands from the Amami Islands, forming part of the boundary between the East China Sea and the Pacific Ocean.
-
E.
Sōya Strait
Sōya Strait is the narrow sea passage between Japan’s Hokkaido and Russia’s Sakhalin Island, serving as a key shipping route connecting the Sea of Japan with the Sea of Okhotsk.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
maritime waterway
ⓘ
strait ⓘ |
| associatedWithEvent |
arrival of Commodore Matthew Perry in 1853
ⓘ
opening of Japan to Western trade ⓘ |
| connectsTo |
Pacific Ocean
ⓘ
Tokyo Bay ⓘ |
| country | Japan ⓘ |
| formsEntranceTo | Tokyo Bay ⓘ |
| function | maritime gateway between Tokyo Bay and the Pacific Ocean ⓘ |
| guardedBy |
Uraga bugyō (magistrate) defenses in Edo period
ⓘ
coastal batteries during Edo period ⓘ |
| hasHistoricalSignificance | entry route of Commodore Perry’s Black Ships ⓘ |
| hasNavigationRole | main entrance channel for large vessels to Tokyo Bay ⓘ |
| hasNearbyFacility | Japan Maritime Self-Defense Force bases in Yokosuka ⓘ |
| hasNearbyPort |
Port of Kawasaki (via Tokyo Bay)
ⓘ
linked to:
Port of Kawasaki
Port of Tokyo (via Tokyo Bay) ⓘ
linked to:
Port of Tokyo
Port of Yokohama (via Tokyo Bay) ⓘ
linked to:
Port of Yokohama
|
| hasRole | key approach route to the Greater Tokyo Area by sea ⓘ |
| hasStrategicImportance |
access route to Tokyo
ⓘ
access route to Tokyo Port ⓘ access route to Yokohama Port ⓘ |
| hasTraffic |
commercial vessels
ⓘ
container ships ⓘ fishing boats ⓘ naval vessels ⓘ oil tankers ⓘ |
| JapaneseName |
浦賀水道
ⓘ
linked to:
Uraga Channel
|
| languageOfName | Japanese ⓘ |
| locatedBetween |
Miura Peninsula and Bōsō Peninsula
ⓘ
linked to:
Miura Peninsula
|
| locatedIn | Japan ⓘ |
| locatedInBodyOfWater | Tokyo Bay ⓘ |
| locatedInPrefecture | Kanagawa Prefecture NERFINISHED ⓘ |
| locatedInRegion | Kantō region ⓘ |
| mouthOf | Tokyo Bay ⓘ |
| namedAfter | Uraga ⓘ |
| nearCity |
Miura
ⓘ
Yokosuka ⓘ |
| partOf |
Northwestern Pacific Ocean
ⓘ
approaches to Tokyo Bay ⓘ |
| regulatedBy | Japanese maritime authorities ⓘ |
| separates |
Bōsō Peninsula
ⓘ
Miura Peninsula ⓘ |
| usedFor |
coastal shipping
ⓘ
fishing ⓘ international shipping ⓘ naval traffic ⓘ |
| waterwayType | natural strait ⓘ |
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: Uraga Channel Description of subject: Uraga Channel is the strait at the mouth of Tokyo Bay that serves as a key maritime gateway between the bay and the open Pacific Ocean.
Referenced by (5)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Uraga Channel