Heisei
E13061
Heisei is the Japanese era name corresponding to the reign of Emperor Akihito, spanning from 1989 to 2019.
All labels observed (5)
| Label | Occurrences |
|---|---|
| Heisei period | 14 |
| Heisei era | 8 |
| Heisei canonical | 7 |
| 平成 | 3 |
| Heisei era enthronement of Akihito | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T105657 — 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: Heisei Context triple: [Emperor of Japan, previousEmperorReignName, Heisei]
-
A.
Showa era
The Shōwa era was the period of Emperor Hirohito’s reign in Japan (1926–1989), marked by militarization and World War II, followed by rapid postwar economic growth and modernization.
-
B.
Reiwa
Reiwa is the current era of Japan’s official calendar, which began in 2019 with the accession of Emperor Naruhito.
-
C.
Taisho era
The Taisho era was a period in Japanese history from 1912 to 1926 marked by political liberalization, cultural modernization, and the growth of urban middle-class society.
-
D.
Meiji era
The Meiji era was a transformative period in Japanese history (1868–1912) marked by rapid modernization, industrialization, and the establishment of Western-style political, educational, and social institutions.
-
E.
Akihito
Akihito is the former Emperor of Japan who abdicated in 2019, ending the Heisei era and becoming the first Japanese monarch to step down in over two centuries.
- 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: Heisei Target entity description: Heisei is the Japanese era name corresponding to the reign of Emperor Akihito, spanning from 1989 to 2019.
-
A.
Showa era
The Shōwa era was the period of Emperor Hirohito’s reign in Japan (1926–1989), marked by militarization and World War II, followed by rapid postwar economic growth and modernization.
-
B.
Reiwa
Reiwa is the current era of Japan’s official calendar, which began in 2019 with the accession of Emperor Naruhito.
-
C.
Taisho era
The Taisho era was a period in Japanese history from 1912 to 1926 marked by political liberalization, cultural modernization, and the growth of urban middle-class society.
-
D.
Meiji era
The Meiji era was a transformative period in Japanese history (1868–1912) marked by rapid modernization, industrialization, and the establishment of Western-style political, educational, and social institutions.
-
E.
Akihito
Akihito is the former Emperor of Japan who abdicated in 2019, ending the Heisei era and becoming the first Japanese monarch to step down in over two centuries.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
Japanese era
ⓘ
historical period ⓘ |
| calendarSystem | Japanese era calendar ⓘ |
| capitalDuringEra | Tokyo ⓘ |
| country | Japan ⓘ |
| emperorDuringEra | Akihito ⓘ |
| emperorTitle | 125th Emperor of Japan ⓘ |
| endDate | 2019-04-30 ⓘ |
| endEvent |
abdication of Emperor Akihito
ⓘ
accession of Emperor Naruhito ⓘ |
| endGregorianYear | 2019 ⓘ |
| eraCode | H ⓘ |
| eraEndHeiseiYear | Heisei 31 ⓘ |
| eraNameOf |
Akihito
ⓘ
surface form:
Emperor Akihito
|
| eraNumberInJapan |
247th era name (traditional count)
ⓘ
4th era of modern Japan (post-Meiji) ⓘ |
| eraStartHeiseiYear | Heisei 1 ⓘ |
| follows |
Showa era
ⓘ
surface form:
Shōwa
|
| governmentFormDuringEra | constitutional monarchy ⓘ |
| kanji |
Heisei
self-linksurface differs
ⓘ
surface form:
平成
|
| language | Japanese ⓘ |
| meaning | achieving peace ⓘ |
| namedAfter |
Akihito
ⓘ
surface form:
Emperor Akihito
|
| notableEventDuringEra |
1990s Japanese asset price bubble collapse
ⓘ
Great Hanshin earthquake ⓘ
surface form:
1995 Great Hanshin earthquake
2011 Tōhoku earthquake and tsunami ⓘ 2019 transition to Reiwa era ⓘ Fukushima Daiichi nuclear disaster ⓘ Lost Decades of Japan ⓘ co-hosting of the 2002 FIFA World Cup ⓘ introduction of the consumption tax increase ⓘ |
| precedes | Reiwa ⓘ |
| predecessorEmperor |
Emperor Hirohito
ⓘ
surface form:
Hirohito
|
| region | East Asia ⓘ |
| reignOf | Akihito ⓘ |
| romaji | Heisei self-link ⓘ |
| startDate | 1989-01-08 ⓘ |
| startEvent |
accession of Emperor Akihito
ⓘ
death of Emperor Shōwa (Hirohito) ⓘ |
| startGregorianYear | 1989 ⓘ |
| successorEmperor | Naruhito ⓘ |
| timeSpanInYears | about 30 years ⓘ |
| usedIn |
Japanese banknotes
ⓘ
Japanese calendar dates ⓘ Japanese coins ⓘ Japanese driver licenses ⓘ Japanese legal documents ⓘ official Japanese documents ⓘ |
| writingSystem | Kanji ⓘ |
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: Heisei Description of subject: Heisei is the Japanese era name corresponding to the reign of Emperor Akihito, spanning from 1989 to 2019.
Referenced by (33)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Emperor of Japan
this entity surface form:
Heisei period
this entity surface form:
Heisei era
subject surface form:
Shōwa era
this entity surface form:
Heisei era
this entity surface form:
Heisei period
this entity surface form:
Heisei period
this entity surface form:
Heisei period
this entity surface form:
Heisei era
subject surface form:
Bright Peace
this entity surface form:
Heisei era
this entity surface form:
Heisei era
this entity surface form:
Heisei period
this entity surface form:
Heisei period
subject surface form:
Yoshirō Mori
this entity surface form:
Heisei period
this entity surface form:
Heisei period
this entity surface form:
Heisei era
subject surface form:
Sokui no rei
this entity surface form:
Heisei era enthronement of Akihito
this entity surface form:
Heisei period
this entity surface form:
Heisei era
this entity surface form:
Heisei period
this entity surface form:
Heisei period
subject surface form:
Princess Kako of Akishino
this entity surface form:
Heisei era
this entity surface form:
Heisei period
this entity surface form:
Heisei period
this entity surface form:
Heisei period