Crown Prince of Japan
E180234
The Crown Prince of Japan is the heir apparent to the Chrysanthemum Throne, traditionally the eldest son of the reigning emperor in Japan’s imperial family.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Crown Prince of Japan canonical | 12 |
| Crown Princess of Japan | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T1561519 — 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: Crown Prince of Japan Context triple: [Yoshihito, title, Crown Prince of Japan]
-
A.
Prince of Japan
The Prince of Japan is a hereditary title traditionally held by male members of the Japanese imperial family who stand in close relation to the reigning Emperor and perform official and ceremonial duties on behalf of the monarchy.
-
B.
Emperor of Japan
The Emperor of Japan is the hereditary monarch and ceremonial head of state of Japan, serving as a symbolic figurehead under the country’s constitutional monarchy.
-
C.
Fumihito, Crown Prince Akishino
Fumihito, Crown Prince Akishino, is the younger brother and heir presumptive to Emperor Naruhito of Japan and a senior member of the Japanese imperial family.
-
D.
Prince Masahito
Prince Masahito was a Japanese imperial prince of the Shōwa era, known primarily as the only son of Emperor Shōwa and Empress Kōjun who died in infancy.
-
E.
Prince Hisahito
Prince Hisahito is a Japanese imperial family member and the only grandson of Emperor Naruhito’s younger brother, widely regarded as a key future heir to the Chrysanthemum Throne.
- 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: Crown Prince of Japan Target entity description: The Crown Prince of Japan is the heir apparent to the Chrysanthemum Throne, traditionally the eldest son of the reigning emperor in Japan’s imperial family.
-
A.
Prince of Japan
The Prince of Japan is a hereditary title traditionally held by male members of the Japanese imperial family who stand in close relation to the reigning Emperor and perform official and ceremonial duties on behalf of the monarchy.
-
B.
Emperor of Japan
The Emperor of Japan is the hereditary monarch and ceremonial head of state of Japan, serving as a symbolic figurehead under the country’s constitutional monarchy.
-
C.
Fumihito, Crown Prince Akishino
Fumihito, Crown Prince Akishino, is the younger brother and heir presumptive to Emperor Naruhito of Japan and a senior member of the Japanese imperial family.
-
D.
Prince Masahito
Prince Masahito was a Japanese imperial prince of the Shōwa era, known primarily as the only son of Emperor Shōwa and Empress Kōjun who died in infancy.
-
E.
Prince Hisahito
Prince Hisahito is a Japanese imperial family member and the only grandson of Emperor Naruhito’s younger brother, widely regarded as a key future heir to the Chrysanthemum Throne.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
hereditary title
ⓘ
position in the Japanese imperial family ⓘ |
| associatedWithDynasty | world’s oldest continuing hereditary monarchy ⓘ |
| associatedWithInstitution | Imperial Household Agency ⓘ |
| associatedWithReligion | Shinto ⓘ |
| associatedWithResidence |
Akasaka Palace
ⓘ
surface form:
Akasaka Imperial Residence
|
| ceremonialRole |
performs official duties on behalf of the Emperor
ⓘ
represents the Emperor at domestic ceremonies ⓘ represents the Emperor on some foreign visits ⓘ |
| constitutionalRole | no political power under the postwar Constitution of Japan ⓘ |
| constitutionalStatus | member of the Imperial Family defined by the Constitution of Japan ⓘ |
| country | Japan ⓘ |
| currentHolder | Fumihito, Crown Prince Akishino ⓘ |
| currentHolderSince | 2019 ⓘ |
| definedByLaw |
Imperial Household Law
ⓘ
surface form:
Imperial House Law of Japan
|
| familyRelationToEmperor |
may be brother of the reigning emperor if no eligible son exists
ⓘ
usually son of the reigning emperor ⓘ |
| femaleEquivalentTitle |
Crown Princess of Japan
ⓘ
Kōtaishi ⓘ
surface form:
Kōtaishi-hi
|
| governedBy |
Cabinet of Japan
ⓘ
surface form:
Cabinet of Japan (in matters of state acts requiring advice and approval)
|
| hasSpouseTitle | Crown Princess of Japan ⓘ |
| heirTo |
Chrysanthemum Throne
ⓘ
Emperor of Japan ⓘ |
| historicalContinuity | title has existed in various forms since ancient Japan ⓘ |
| JapaneseTitle | Kōtaishi ⓘ |
| languageOfTitle | Japanese ⓘ |
| legalRestriction | must be a male member of the Imperial Family under current law ⓘ |
| locatedIn | Tokyo ⓘ |
| memberOf | Yamato dynasty ⓘ |
| notableFormerHolder |
Akihito
ⓘ
Emperor Hirohito ⓘ
surface form:
Hirohito
Naruhito ⓘ |
| officeVacantWhen | holder ascends the throne as Emperor of Japan ⓘ |
| partOf | Imperial House of Japan ⓘ |
| predecessorInOffice | Naruhito ⓘ |
| prewarStatus | part of the imperial institution under the Meiji Constitution ⓘ |
| rankInImperialFamily | first in line to the Chrysanthemum Throne ⓘ |
| region | East Asia ⓘ |
| residence |
Akasaka Estate, Tokyo
ⓘ
surface form:
Akasaka Estate
|
| style | His Imperial Highness ⓘ |
| subordinateTo | Emperor of Japan ⓘ |
| successionType |
agnatic primogeniture (modern legal framework)
ⓘ
male-preference primogeniture (historical practice) ⓘ |
| symbolicStatus | symbol of the continuity of the Japanese monarchy ⓘ |
| titleCategory | crown prince title ⓘ |
| titleInKanji | 皇太子 ⓘ |
| titleInRomaji | Kōtaishi ⓘ |
| traditionalHeir | eldest son of the reigning emperor ⓘ |
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: Crown Prince of Japan Description of subject: The Crown Prince of Japan is the heir apparent to the Chrysanthemum Throne, traditionally the eldest son of the reigning emperor in Japan’s imperial family.
Referenced by (13)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Crown Princess of Japan
subject surface form:
Fumihito, Crown Prince Akishino