Uchibō Line
E691107
The Uchibō Line is a coastal railway route in Chiba Prefecture, Japan, operated by JR East and known for connecting Tokyo’s outskirts with towns along the western side of the Bōsō Peninsula.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Uchibō Line canonical | 7 |
How this entity was disambiguated
This entity first appeared as the object of triple T5709171 — 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: Uchibō Line Context triple: [Boso Peninsula, hasTransportation, Uchibō Line]
-
A.
Marunouchi Line
The Marunouchi Line is one of Tokyo’s main subway lines, forming a central loop and radial route that connects key business, shopping, and transit hubs across the city.
-
B.
Fukutoshin Line
The Fukutoshin Line is a Tokyo Metro subway line in Tokyo, Japan, connecting major commercial and residential districts such as Shibuya, Shinjuku, and Ikebukuro.
-
C.
Hanzōmon Line
The Hanzōmon Line is a Tokyo Metro subway line in Tokyo, Japan, connecting central districts with eastern and southwestern suburbs as part of the city’s urban rail network.
-
D.
Sennichimae Line
The Sennichimae Line is a rapid transit line in Osaka, Japan, forming part of the city’s urban subway network.
-
E.
Minobu Line
The Minobu Line is a regional railway line in Japan operated by JR Central that connects Fuji in Shizuoka Prefecture with Kōfu in Yamanashi Prefecture, serving communities along the Fuji River.
- 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: Uchibō Line Target entity description: The Uchibō Line is a coastal railway route in Chiba Prefecture, Japan, operated by JR East and known for connecting Tokyo’s outskirts with towns along the western side of the Bōsō Peninsula.
-
A.
Marunouchi Line
The Marunouchi Line is one of Tokyo’s main subway lines, forming a central loop and radial route that connects key business, shopping, and transit hubs across the city.
-
B.
Fukutoshin Line
The Fukutoshin Line is a Tokyo Metro subway line in Tokyo, Japan, connecting major commercial and residential districts such as Shibuya, Shinjuku, and Ikebukuro.
-
C.
Hanzōmon Line
The Hanzōmon Line is a Tokyo Metro subway line in Tokyo, Japan, connecting central districts with eastern and southwestern suburbs as part of the city’s urban rail network.
-
D.
Sennichimae Line
The Sennichimae Line is a rapid transit line in Osaka, Japan, forming part of the city’s urban subway network.
-
E.
Minobu Line
The Minobu Line is a regional railway line in Japan operated by JR Central that connects Fuji in Shizuoka Prefecture with Kōfu in Yamanashi Prefecture, serving communities along the Fuji River.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
heavy rail
ⓘ
railway line ⓘ |
| connectsTo |
Keiyō Line
ⓘ
Sotobō Line ⓘ Uchibo–Sotobo loop around Bōsō Peninsula ⓘ |
| country | Japan ⓘ |
| electrification | 1,500 V DC overhead catenary ⓘ |
| electrifiedSection | entire line ⓘ |
| endPoint | Awa-Kamogawa Station NERFINISHED ⓘ |
| formerOperator | Japanese National Railways ⓘ |
| hasRollingStock |
209 series EMU
ⓘ
E131 series EMU ⓘ
linked to:
E131 series
E233 series EMU ⓘ |
| hasStation |
Awa-Kamogawa Station
NERFINISHED
ⓘ
Kimitsu Station NERFINISHED ⓘ Kisarazu Station NERFINISHED ⓘ Soga Station NERFINISHED ⓘ Tateyama Station NERFINISHED ⓘ |
| lineLength | about 120.5 km ⓘ |
| lineNumber | JO (in JR East route maps for part of the line) ⓘ |
| locatedIn |
Bōsō Peninsula
ⓘ
Chiba Prefecture NERFINISHED ⓘ Tokyo Bay coastal area ⓘ
linked to:
Tokyo Bay region
|
| locatedInTimeZone | Japan Standard Time ⓘ |
| notableFeature |
forms part of a loop around the Bōsō Peninsula with the Sotobō Line
ⓘ
runs along Tokyo Bay coast ⓘ |
| openingDate | 1912 ⓘ |
| operator |
East Japan Railway Company
ⓘ
JR East ⓘ
linked to:
East Japan Railway Company
|
| owner | East Japan Railway Company ⓘ |
| ownerBefore1987 | Japanese National Railways ⓘ |
| partOfNetwork |
JR East railway network
ⓘ
linked to:
JR East urban network
|
| passesThrough |
Futtsu
ⓘ
Kimitsu ⓘ Kisarazu ⓘ Minamibōsō ⓘ Tateyama ⓘ |
| railwaySignaling | automatic block system ⓘ |
| regionServed |
Tokyo metropolitan area outskirts
ⓘ
western coast of Bōsō Peninsula ⓘ |
| serviceType |
commuter rail
ⓘ
regional rail ⓘ |
| startingPoint | Soga Station NERFINISHED ⓘ |
| terminus |
Awa-Kamogawa Station
NERFINISHED
ⓘ
Soga Station NERFINISHED ⓘ |
| trackGauge |
1,067 mm
ⓘ
Cape gauge ⓘ |
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: Uchibō Line Description of subject: The Uchibō Line is a coastal railway route in Chiba Prefecture, Japan, operated by JR East and known for connecting Tokyo’s outskirts with towns along the western side of the Bōsō Peninsula.
Referenced by (7)
Full triples — surface form annotated when it differs from this entity's canonical label.