Hokkaido Shinkansen
E352926
Hokkaido Shinkansen is a high-speed railway line in Japan that connects the island of Hokkaido with the main Honshu island via the undersea Seikan Tunnel.
All labels observed (4)
| Label | Occurrences |
|---|---|
| Hokkaido Shinkansen canonical | 5 |
| Hokkaido Shinkansen (via nearby Shin-Hakodate-Hokuto Station) | 1 |
| Hokkaidō Shinkansen | 1 |
| 北海道新幹線 | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T3131951 — 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: Hokkaido Shinkansen Context triple: [Shinkansen high-speed rail network, hasLine, Hokkaido Shinkansen]
-
A.
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.
-
B.
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.
-
C.
Yamagata Shinkansen
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.
-
D.
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.
-
E.
Akita Shinkansen
The Akita Shinkansen is a Japanese high-speed "mini-shinkansen" rail line connecting Akita Prefecture with the Tōhoku Shinkansen network, providing fast intercity service to and from Tokyo.
- 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: Hokkaido Shinkansen Target entity description: Hokkaido Shinkansen is a high-speed railway line in Japan that connects the island of Hokkaido with the main Honshu island via the undersea Seikan Tunnel.
-
A.
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.
-
B.
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.
-
C.
Yamagata Shinkansen
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.
-
D.
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.
-
E.
Akita Shinkansen
The Akita Shinkansen is a Japanese high-speed "mini-shinkansen" rail line connecting Akita Prefecture with the Tōhoku Shinkansen network, providing fast intercity service to and from Tokyo.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
Shinkansen line
ⓘ
high-speed railway line ⓘ |
| allowsFreightTrains | yes (through Seikan Tunnel section) ⓘ |
| bridgeBetweenRegions | Tohoku region and Hokkaido ⓘ |
| connectedLine |
Tōhoku Shinkansen
ⓘ
surface form:
Tohoku Shinkansen
|
| connectsCity |
Aomori
NERFINISHED
ⓘ
Hakodate ⓘ
surface form:
Hakodate (via Shin-Hakodate-Hokuto)
|
| connectsIsland |
Hokkaido
ⓘ
Honshu ⓘ |
| constructionStart | 2005 ⓘ |
| country | Japan ⓘ |
| electrification | AC 25 kV 50 Hz overhead catenary ⓘ |
| fundingModel | national and local government with JR usage fees ⓘ |
| futureTerminusStation | Sapporo Station NERFINISHED ⓘ |
| gaugeConversionSection |
Seikan Tunnel
ⓘ
surface form:
Seikan Tunnel section
|
| languageOfName | Japanese ⓘ |
| lineLength | approximately 148.9 km ⓘ |
| locale |
Aomori Prefecture
NERFINISHED
ⓘ
Hokkaido ⓘ |
| maximumOperatingSpeed | 260 km/h ⓘ |
| nativeName |
Hokkaido Shinkansen
self-linksurface differs
ⓘ
surface form:
北海道新幹線
|
| notableFeature | uses the world’s longest undersea railway tunnel (Seikan Tunnel) ⓘ |
| openingDate | 2016-03-26 ⓘ |
| operator |
East Japan Railway Company
ⓘ
Hokkaido Railway Company ⓘ |
| owner | Japan Railway Construction, Transport and Technology Agency ⓘ |
| partOfNetwork |
Shinkansen high-speed rail network
ⓘ
surface form:
Shinkansen network
|
| passesThroughStation |
Kikonai Station
NERFINISHED
ⓘ
Okutsugaru-Imabetsu Station NERFINISHED ⓘ |
| passesThroughStructure | Seikan Tunnel ⓘ |
| plannedExtensionOpening | around 2030s ⓘ |
| plannedExtensionTo | Sapporo ⓘ |
| plannedMaximumSpeed | 320 km/h ⓘ |
| primaryPurpose | passenger transport ⓘ |
| regionServed | northern Japan ⓘ |
| rollingStockUsed |
E5 series Shinkansen
ⓘ
H5 series Shinkansen ⓘ |
| safetySystem |
Automatic Train Control
ⓘ
surface form:
ATC (Automatic Train Control)
|
| separateFrom | conventional Hakodate Main Line ⓘ |
| serviceType |
Hayabusa
ⓘ
Hayate ⓘ |
| startingStation | Shin-Aomori Station NERFINISHED ⓘ |
| status | in operation ⓘ |
| terminusStation | Shin-Hakodate-Hokuto Station NERFINISHED ⓘ |
| ticketingSystem | JR ticketing and reserved-seat system ⓘ |
| trackConfiguration | double track ⓘ |
| trackGauge | 1435 mm ⓘ |
| usesTunnel | Seikan Tunnel ⓘ |
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: Hokkaido Shinkansen Description of subject: Hokkaido Shinkansen is a high-speed railway line in Japan that connects the island of Hokkaido with the main Honshu island via the undersea Seikan Tunnel.
Referenced by (8)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Hokkaido Shinkansen (via nearby Shin-Hakodate-Hokuto Station)
this entity surface form:
Hokkaidō Shinkansen
this entity surface form:
北海道新幹線