Yamagata Shinkansen
E191174
The Yamagata Shinkansen is a Japanese high-speed "mini-shinkansen" rail line connecting Tokyo with Yamagata Prefecture by upgrading conventional tracks for Shinkansen through-service.
All labels observed (4)
| Label | Occurrences |
|---|---|
| Yamagata Shinkansen canonical | 20 |
| JR East Shinkansen service | 1 |
| Yamagata Shinkansen Tsubasa services | 1 |
| Yamagata Shinkansen route | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T1592354 — 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: Yamagata Shinkansen Context triple: [Tokyo Station, serves, Yamagata Shinkansen]
-
A.
Jōetsu Shinkansen
The Jōetsu Shinkansen is a high-speed rail line in Japan that connects Tokyo with the Niigata region, providing rapid passenger service through central Honshu.
-
B.
Hokuriku Shinkansen
The Hokuriku Shinkansen is a high-speed rail line in Japan connecting Tokyo with cities along the Sea of Japan coast, including Nagano, Toyama, and Kanazawa.
-
C.
Tōhoku Shinkansen
The Tōhoku Shinkansen is a high-speed rail line in Japan that connects Tokyo with the Tōhoku region in the northeast of Honshu.
-
D.
Tokaido Shinkansen
The Tokaido Shinkansen is Japan’s pioneering high-speed rail line connecting Tokyo with Osaka and other major cities, renowned for its speed, punctuality, and heavy passenger usage.
-
E.
Sanyo Shinkansen
Sanyo Shinkansen is a high-speed railway line in Japan that connects Osaka with western Honshu cities such as Hiroshima and Fukuoka as part of the Shinkansen network.
- 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: Yamagata Shinkansen Target entity description: The Yamagata Shinkansen is a Japanese high-speed "mini-shinkansen" rail line connecting Tokyo with Yamagata Prefecture by upgrading conventional tracks for Shinkansen through-service.
-
A.
Jōetsu Shinkansen
The Jōetsu Shinkansen is a high-speed rail line in Japan that connects Tokyo with the Niigata region, providing rapid passenger service through central Honshu.
-
B.
Hokuriku Shinkansen
The Hokuriku Shinkansen is a high-speed rail line in Japan connecting Tokyo with cities along the Sea of Japan coast, including Nagano, Toyama, and Kanazawa.
-
C.
Tōhoku Shinkansen
The Tōhoku Shinkansen is a high-speed rail line in Japan that connects Tokyo with the Tōhoku region in the northeast of Honshu.
-
D.
Tokaido Shinkansen
The Tokaido Shinkansen is Japan’s pioneering high-speed rail line connecting Tokyo with Osaka and other major cities, renowned for its speed, punctuality, and heavy passenger usage.
-
E.
Sanyo Shinkansen
Sanyo Shinkansen is a high-speed railway line in Japan that connects Osaka with western Honshu cities such as Hiroshima and Fukuoka as part of the Shinkansen network.
- F. None of above. chosen
Statements (43)
| Predicate | Object |
|---|---|
| instanceOf |
high-speed rail line
ⓘ
mini-shinkansen line ⓘ railway line in Japan ⓘ |
| category |
Railway lines opened in 1992
ⓘ
Shinkansen lines ⓘ Standard gauge railways in Japan ⓘ |
| connectsWith |
Tohoku Shinkansen
ⓘ
linked to:
Tōhoku Shinkansen
|
| conversionType | narrow-gauge to standard-gauge conversion ⓘ |
| country | Japan ⓘ |
| electrification | AC 20 kV 50 Hz overhead catenary ⓘ |
| extendedTo | Shinjō Station NERFINISHED ⓘ |
| extensionOpeningDate | 1999 ⓘ |
| gaugeBeforeConversion | 1,067 mm narrow gauge ⓘ |
| initialTerminus | Yamagata Station NERFINISHED ⓘ |
| lineLength | approximately 148 km ⓘ |
| lineType | converted conventional line ⓘ |
| maximumSpeed | 240 km/h ⓘ |
| notableFeature |
Shinkansen trains run on upgraded former conventional tracks
ⓘ
shares double-decked E3 series sets with Akita Shinkansen historically ⓘ |
| numberOfTracks | mostly single track ⓘ |
| openedAs | mini-shinkansen converted from Ōu Main Line ⓘ |
| openingDate | 1992 ⓘ |
| operator |
East Japan Railway Company
ⓘ
JR East ⓘ
linked to:
East Japan Railway Company
|
| owner |
East Japan Railway Company
ⓘ
JR East ⓘ
linked to:
East Japan Railway Company
|
| passesThrough |
Fukushima Prefecture
NERFINISHED
ⓘ
Miyagi Prefecture ⓘ Yamagata Prefecture NERFINISHED ⓘ |
| purpose | improve access between Tokyo and Yamagata Prefecture ⓘ |
| regionServed |
Tōhoku region
ⓘ
linked to:
Tohoku
|
| safetySystem | ATC ⓘ |
| servicePattern | through service from Tokyo via Tohoku Shinkansen ⓘ |
| services | Tsubasa ⓘ |
| serviceType |
high-speed rail
ⓘ
intercity rail ⓘ |
| startingPoint | Tokyo Station ⓘ |
| terminus | Shinjō Station NERFINISHED ⓘ |
| trackGauge | 1,435 mm standard gauge ⓘ |
| usesCouplingOperation | couples with other Shinkansen services on Tohoku Shinkansen ⓘ |
| usesInfrastructure | Ōu Main Line ⓘ |
| usesRollingStock |
E3 series Shinkansen
ⓘ
E8 series Shinkansen ⓘ |
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: Yamagata Shinkansen Description of subject: The Yamagata Shinkansen is a Japanese high-speed "mini-shinkansen" rail line connecting Tokyo with Yamagata Prefecture by upgrading conventional tracks for Shinkansen through-service.
Referenced by (23)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Yamagata Shinkansen
linked to: Yamagata Shinkansen