Nambu Line
E691470
The Nambu Line is a railway line in the Tokyo metropolitan area of Japan operated by JR East, connecting Kawasaki in Kanagawa Prefecture with Tachikawa in western Tokyo and serving as a key commuter route.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Nambu Line canonical | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T5716363 — 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: Nambu Line Context triple: [E233 series EMU, usedOnLine, Nambu Line]
-
A.
Jōban Line
The Jōban Line is a major railway corridor in Japan operated by JR East, connecting central Tokyo with the northeastern Kanto and Tōhoku regions along the Pacific coast.
-
B.
Yamatoji Line
The Yamatoji Line is a railway line in Japan operated by JR West that connects Osaka with Nara, serving as a key commuter and intercity route in the Kansai region.
-
C.
Kosei Line
The Kosei Line is a railway line in Japan operated by JR West that runs along the western shore of Lake Biwa, connecting Kyoto with the Shiga and Fukui prefecture areas.
-
D.
Uchibō Line
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.
-
E.
Sōbu Line
The Sōbu Line is a major Japan Railways (JR) commuter and intercity railway line in the Tokyo–Chiba area, connecting central Tokyo with eastern suburbs and cities in Chiba Prefecture.
- 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: Nambu Line Target entity description: The Nambu Line is a railway line in the Tokyo metropolitan area of Japan operated by JR East, connecting Kawasaki in Kanagawa Prefecture with Tachikawa in western Tokyo and serving as a key commuter route.
-
A.
Jōban Line
The Jōban Line is a major railway corridor in Japan operated by JR East, connecting central Tokyo with the northeastern Kanto and Tōhoku regions along the Pacific coast.
-
B.
Yamatoji Line
The Yamatoji Line is a railway line in Japan operated by JR West that connects Osaka with Nara, serving as a key commuter and intercity route in the Kansai region.
-
C.
Kosei Line
The Kosei Line is a railway line in Japan operated by JR West that runs along the western shore of Lake Biwa, connecting Kyoto with the Shiga and Fukui prefecture areas.
-
D.
Uchibō Line
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.
-
E.
Sōbu Line
The Sōbu Line is a major Japan Railways (JR) commuter and intercity railway line in the Tokyo–Chiba area, connecting central Tokyo with eastern suburbs and cities in Chiba Prefecture.
- F. None of above. chosen
Statements (44)
| Predicate | Object |
|---|---|
| instanceOf |
commuter rail line
ⓘ
railway line ⓘ |
| connects |
Kawasaki
NERFINISHED
ⓘ
Tachikawa NERFINISHED ⓘ |
| connectsPrefecture |
Kanagawa Prefecture
NERFINISHED
ⓘ
Tokyo Metropolis NERFINISHED ⓘ |
| country | Japan ⓘ |
| electrification | 1,500 V DC overhead catenary ⓘ |
| formerOperator | Japanese National Railways NERFINISHED ⓘ |
| hasAbbreviation | JN NERFINISHED ⓘ |
| hasColorOnMaps | yellow ⓘ |
| hasInfrastructureType | double track on most sections ⓘ |
| hasLineNumbering | JN NERFINISHED ⓘ |
| hasServicePattern | through commuter services within Tokyo metropolitan area ⓘ |
| hasServiceType |
local trains
ⓘ
rapid trains ⓘ |
| hasSignalling | automatic signalling ⓘ |
| hasTrainProtection |
ATS-B
NERFINISHED
ⓘ
ATS-P NERFINISHED ⓘ |
| isKeyRouteFor |
commuters in Kawasaki area
ⓘ
commuters in southern Tama area ⓘ |
| laterManagedBy | Japanese National Railways NERFINISHED ⓘ |
| laterNationalized | Japanese Government Railways NERFINISHED ⓘ |
| locatedIn |
Kawasaki, Kanagawa Prefecture
NERFINISHED
ⓘ
Tachikawa, Tokyo NERFINISHED ⓘ Tokyo metropolitan area NERFINISHED ⓘ |
| openedBy | Nambu Railway NERFINISHED ⓘ |
| operator |
East Japan Railway Company
NERFINISHED
ⓘ
JR East NERFINISHED ⓘ |
| owner |
East Japan Railway Company
NERFINISHED
ⓘ
JR East NERFINISHED ⓘ |
| partOfNetwork | JR East urban network NERFINISHED ⓘ |
| primaryUse | commuter transport ⓘ |
| railwaySystem | JR Group NERFINISHED ⓘ |
| region | Kantō region ⓘ |
| servesArea |
Kanagawa Prefecture
NERFINISHED
ⓘ
Tokyo Metropolis NERFINISHED ⓘ |
| status | in operation ⓘ |
| terminus |
Kawasaki Station
NERFINISHED
ⓘ
Tachikawa Station NERFINISHED ⓘ |
| trackGauge |
1,067 mm
ⓘ
Cape gauge ⓘ |
| transferredTo | JR East in 1987 ⓘ |
| usesRollingStock | E233 series EMU 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.
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: Nambu Line Description of subject: The Nambu Line is a railway line in the Tokyo metropolitan area of Japan operated by JR East, connecting Kawasaki in Kanagawa Prefecture with Tachikawa in western Tokyo and serving as a key commuter route.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.