Lake Hachirogata
E872267
Lake Hachirogata is a coastal lagoon in Akita Prefecture, Japan, historically one of the country’s largest lakes before extensive land reclamation reduced its size.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Lake Hachirogata canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T10546792 — 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: Lake Hachirogata Context triple: [Akita Prefecture, hasLake, Lake Hachirogata]
-
A.
Lake Kussharo
Lake Kussharo is a large caldera lake in eastern Hokkaido, Japan, renowned for its volcanic scenery, hot springs, and surrounding natural beauty.
-
B.
Lake Haruna
Lake Haruna is a scenic crater lake in Gunma Prefecture, Japan, known for its tranquil waters, surrounding volcanic landscapes, and popularity as a recreational and tourist destination.
-
C.
Lake Motosu
Lake Motosu is one of the Fuji Five Lakes in Yamanashi Prefecture, Japan, renowned for its clear deep waters and iconic views of Mount Fuji reflected on its surface.
-
D.
Lake Shoji
Lake Shoji is one of the Fuji Five Lakes in Japan, known for its tranquil waters and scenic views of Mount Fuji.
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E.
Lake Yamanaka
Lake Yamanaka is the largest of the Fuji Five Lakes in Japan, known for its scenic views of Mount Fuji and popularity as a resort and recreational area.
- 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: Lake Hachirogata Target entity description: Lake Hachirogata is a coastal lagoon in Akita Prefecture, Japan, historically one of the country’s largest lakes before extensive land reclamation reduced its size.
-
A.
Lake Kussharo
Lake Kussharo is a large caldera lake in eastern Hokkaido, Japan, renowned for its volcanic scenery, hot springs, and surrounding natural beauty.
-
B.
Lake Haruna
Lake Haruna is a scenic crater lake in Gunma Prefecture, Japan, known for its tranquil waters, surrounding volcanic landscapes, and popularity as a recreational and tourist destination.
-
C.
Lake Motosu
Lake Motosu is one of the Fuji Five Lakes in Yamanashi Prefecture, Japan, renowned for its clear deep waters and iconic views of Mount Fuji reflected on its surface.
-
D.
Lake Shoji
Lake Shoji is one of the Fuji Five Lakes in Japan, known for its tranquil waters and scenic views of Mount Fuji.
-
E.
Lake Yamanaka
Lake Yamanaka is the largest of the Fuji Five Lakes in Japan, known for its scenic views of Mount Fuji and popularity as a resort and recreational area.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
lagoon
ⓘ
lake ⓘ |
| averageDepth | approximately 2 metres ⓘ |
| borderedBy |
Ikawa Town
NERFINISHED
ⓘ
Katagami City NERFINISHED ⓘ Ogata Village NERFINISHED ⓘ |
| connectedBy | canals ⓘ |
| connectedTo | Sea of Japan NERFINISHED ⓘ |
| country | Japan ⓘ |
| currentArea | about 48 square kilometres ⓘ |
| ecosystemType | wetland ecosystem ⓘ |
| elevation | approximately 0 metres ⓘ |
| governedBy |
Akita Prefectural Government
NERFINISHED
ⓘ
Ministry of Agriculture, Forestry and Fisheries of Japan NERFINISHED ⓘ |
| hasIssue |
habitat loss due to reclamation
ⓘ
water quality management ⓘ |
| hasPart | Ogata reclaimed land NERFINISHED ⓘ |
| historicalArea | about 220 square kilometres ⓘ |
| historicalRank | second-largest lake in Japan before reclamation ⓘ |
| knownFor |
dramatic reduction in surface area
ⓘ
large-scale postwar land reclamation project ⓘ wetland and waterfowl habitat ⓘ |
| locatedIn |
Akita Prefecture
NERFINISHED
ⓘ
Honshu ⓘ Oga Peninsula area NERFINISHED ⓘ Tōhoku region NERFINISHED ⓘ |
| locatedNear |
Akita City
NERFINISHED
ⓘ
Ikawa NERFINISHED ⓘ Katagami NERFINISHED ⓘ Oga Peninsula NERFINISHED ⓘ Ogata NERFINISHED ⓘ |
| locatedOn | Sea of Japan coast NERFINISHED ⓘ |
| majorInflow |
Koyoshi River
NERFINISHED
ⓘ
Yokote River NERFINISHED ⓘ |
| majorOutflow | artificial drainage canals ⓘ |
| maximumDepth | approximately 4 metres ⓘ |
| reclamationCompletion | 1977 ⓘ |
| reclamationMethod | drainage and land reclamation ⓘ |
| reclamationPeakPeriod | 1960s ⓘ |
| reclamationPurpose |
agricultural land creation
ⓘ
rice cultivation ⓘ |
| reclamationStart | 1957 ⓘ |
| usedFor |
fisheries
ⓘ
irrigation ⓘ recreation ⓘ |
| waterType |
brackish water
ⓘ
coastal lagoon ⓘ |
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: Lake Hachirogata Description of subject: Lake Hachirogata is a coastal lagoon in Akita Prefecture, Japan, historically one of the country’s largest lakes before extensive land reclamation reduced its size.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.