Keihin-Tōhoku
E1040511
Keihin-Tōhoku is a major commuter rail service in the Greater Tokyo area of Japan, operated by JR East and running north–south through Tokyo, Saitama, and Kanagawa Prefectures.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Keihin-Tōhoku canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T13217411 — 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: Keihin-Tōhoku Context triple: [Keihin-Tōhoku Line, abbreviation, Keihin-Tōhoku]
-
A.
Tohoku
Tohoku is the northeastern region of Japan’s main island, known for its rural landscapes, harsh winters, and rich traditional culture.
-
B.
Aizu region
The Aizu region is a historic area in western Fukushima Prefecture, Japan, known for its samurai heritage, traditional castle town of Aizuwakamatsu, and scenic mountainous landscapes.
-
C.
Hokuriku region
The Hokuriku region is a coastal area in northwestern Honshu, Japan, known for its heavy snowfall, Sea of Japan shoreline, and historic castle and hot spring towns.
-
D.
Iwate Prefecture
Iwate Prefecture is a largely rural, mountainous prefecture in Japan’s Tōhoku region, known for its rugged coastline, cultural heritage sites, and the city of Morioka as its capital.
-
E.
Hidaka region
The Hidaka region is a coastal and mountainous area in southeastern Hokkaido, Japan, known for its horse breeding, kelp production, and rugged natural scenery.
- 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: Keihin-Tōhoku Target entity description: Keihin-Tōhoku is a major commuter rail service in the Greater Tokyo area of Japan, operated by JR East and running north–south through Tokyo, Saitama, and Kanagawa Prefectures.
-
A.
Tohoku
Tohoku is the northeastern region of Japan’s main island, known for its rural landscapes, harsh winters, and rich traditional culture.
-
B.
Aizu region
The Aizu region is a historic area in western Fukushima Prefecture, Japan, known for its samurai heritage, traditional castle town of Aizuwakamatsu, and scenic mountainous landscapes.
-
C.
Hokuriku region
The Hokuriku region is a coastal area in northwestern Honshu, Japan, known for its heavy snowfall, Sea of Japan shoreline, and historic castle and hot spring towns.
-
D.
Iwate Prefecture
Iwate Prefecture is a largely rural, mountainous prefecture in Japan’s Tōhoku region, known for its rugged coastline, cultural heritage sites, and the city of Morioka as its capital.
-
E.
Hidaka region
The Hidaka region is a coastal and mountainous area in southeastern Hokkaido, Japan, known for its horse breeding, kelp production, and rugged natural scenery.
- F. None of above. chosen
Statements (38)
| Predicate | Object |
|---|---|
| instanceOf |
commuter rail service
ⓘ
railway line ⓘ |
| category | JR East urban rail line ⓘ |
| commuterRole | links central Tokyo with northern and southern suburbs ⓘ |
| connectsArea |
Kanagawa Prefecture
ⓘ
Saitama Prefecture ⓘ Tokyo Metropolis ⓘ
linked to:
Tokyo Metropolis, Japan
|
| country | Japan ⓘ |
| direction | north–south ⓘ |
| electrification | 1,500 V DC overhead catenary ⓘ |
| fareSystem | JR East fare system ⓘ |
| hasService | rapid service (historically and in some sections) ⓘ |
| languageOfName | Japanese ⓘ |
| locatedIn |
Greater Tokyo Area
ⓘ
linked to:
Tokyo metropolitan area
Kanagawa Prefecture ⓘ Saitama Prefecture ⓘ Tokyo Prefecture ⓘ |
| nameDerivation | Keihin from Tokyo and Yokohama ⓘ |
| operator |
East Japan Railway Company
ⓘ
JR East ⓘ
linked to:
East Japan Railway Company
|
| owner | East Japan Railway Company ⓘ |
| partOfNetwork | JR East urban network ⓘ |
| primaryUse | commuter traffic ⓘ |
| railGauge | 1,067 mm ⓘ |
| railwaySignaling | automatic block signaling ⓘ |
| rollingStock |
E233 series EMU
ⓘ
E235 series EMU ⓘ |
| safetySystem |
ATC
ⓘ
ATS ⓘ |
| servesRegion |
Keihin industrial region
ⓘ
linked to:
Keihin Industrial Region
|
| serviceArea |
Greater Tokyo commuter belt
ⓘ
linked to:
Saitama metropolitan area
|
| servicePattern | all-stations service ⓘ |
| serviceType | commuter rail ⓘ |
| ticketing | Suica compatible ⓘ |
| trackConfiguration | double track ⓘ |
| uses |
Tōhoku Main Line infrastructure
ⓘ
Tōkaidō Main Line infrastructure ⓘ |
| writingSystemOfName | Latin alphabet romanization ⓘ |
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: Keihin-Tōhoku Description of subject: Keihin-Tōhoku is a major commuter rail service in the Greater Tokyo area of Japan, operated by JR East and running north–south through Tokyo, Saitama, and Kanagawa Prefectures.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.