Tōhoku Main Line
E445085
The Tōhoku Main Line is a major Japanese railway corridor running through the Tōhoku region, historically serving as the primary conventional rail route between Tokyo and northern Honshu.
All labels observed (6)
| Label | Occurrences |
|---|---|
| Tōhoku Main Line canonical | 7 |
| JR East Tohoku Main Line | 1 |
| Tohoku Main Line | 1 |
| Tōhoku Main Line (suburban section) | 1 |
| Tōhoku Main Line corridor | 1 |
| 東北本線 | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T2480077 — 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: Tōhoku Main Line Context triple: [Japanese National Railways, operatedLine, Tōhoku Main Line]
-
A.
Keihin-Tōhoku Line
The Keihin-Tōhoku Line is a major JR East commuter rail line in the Greater Tokyo area that runs north–south through Tokyo, connecting Saitama and Kanagawa prefectures.
-
B.
Jōetsu Line
The Jōetsu Line is a major railway line in Japan operated by JR East that connects the Kanto region with Niigata Prefecture through the mountainous interior of Honshu.
-
C.
Sanyo Main Line
The Sanyo Main Line is a major railway corridor in western Japan connecting the Kansai and Chugoku regions along the Seto Inland Sea coast.
-
D.
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.
-
E.
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.
- 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: Tōhoku Main Line Target entity description: The Tōhoku Main Line is a major Japanese railway corridor running through the Tōhoku region, historically serving as the primary conventional rail route between Tokyo and northern Honshu.
-
A.
Keihin-Tōhoku Line
The Keihin-Tōhoku Line is a major JR East commuter rail line in the Greater Tokyo area that runs north–south through Tokyo, connecting Saitama and Kanagawa prefectures.
-
B.
Jōetsu Line
The Jōetsu Line is a major railway line in Japan operated by JR East that connects the Kanto region with Niigata Prefecture through the mountainous interior of Honshu.
-
C.
Sanyo Main Line
The Sanyo Main Line is a major railway corridor in western Japan connecting the Kansai and Chugoku regions along the Seto Inland Sea coast.
-
D.
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.
-
E.
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.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
conventional railway line
ⓘ
railway line ⓘ |
| connects |
Aomori
NERFINISHED
ⓘ
Kanto region NERFINISHED ⓘ Tokyo NERFINISHED ⓘ Tōhoku region NERFINISHED ⓘ |
| country | Japan ⓘ |
| electrification | 1500 V DC overhead catenary ⓘ |
| formerOperator | Japanese National Railways NERFINISHED ⓘ |
| gauge |
1067 mm
ⓘ
Cape gauge ⓘ |
| hasSection |
Morioka–Aomori section
NERFINISHED
ⓘ
Omiya–Utsunomiya section NERFINISHED ⓘ Ueno–Omiya section NERFINISHED ⓘ Utsunomiya–Morioka section NERFINISHED ⓘ |
| historicalImportance | backbone of rail transport between Tokyo and northern Honshu before high-speed rail ⓘ |
| historicalRole | primary conventional rail route between Tokyo and northern Honshu ⓘ |
| lineType |
intercity rail
ⓘ
regional rail ⓘ |
| locatedIn | Tōhoku region NERFINISHED ⓘ |
| locatedOn | Honshu ⓘ |
| opened | late 19th century ⓘ |
| operator |
East Japan Railway Company
NERFINISHED
ⓘ
JR East NERFINISHED ⓘ |
| owner | East Japan Railway Company NERFINISHED ⓘ |
| parallelTo | Tōhoku Shinkansen NERFINISHED ⓘ |
| partOf | JR East network NERFINISHED ⓘ |
| railwaySystem | Japanese railway network ⓘ |
| regionServed |
Aomori Prefecture
NERFINISHED
ⓘ
Fukushima Prefecture NERFINISHED ⓘ Iwate Prefecture NERFINISHED ⓘ Miyagi Prefecture NERFINISHED ⓘ Saitama Prefecture NERFINISHED ⓘ Tochigi Prefecture NERFINISHED ⓘ |
| serves |
freight traffic
ⓘ
passenger traffic ⓘ |
| servesCity |
Fukushima
NERFINISHED
ⓘ
Hachinohe NERFINISHED ⓘ Ichinoseki NERFINISHED ⓘ Kōriyama NERFINISHED ⓘ Morioka NERFINISHED ⓘ Sendai NERFINISHED ⓘ Utsunomiya NERFINISHED ⓘ |
| startingPoint | Tokyo Station NERFINISHED ⓘ |
| status | in operation ⓘ |
| terminus | Aomori Station NERFINISHED ⓘ |
| trackConfiguration | double track ⓘ |
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: Tōhoku Main Line Description of subject: The Tōhoku Main Line is a major Japanese railway corridor running through the Tōhoku region, historically serving as the primary conventional rail route between Tokyo and northern Honshu.
Referenced by (12)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Tōhoku Main Line (suburban section)
this entity surface form:
Tōhoku Main Line corridor
this entity surface form:
Tohoku Main Line
this entity surface form:
JR East Tohoku Main Line