Shinjiro Koizumi
E103484
Shinjiro Koizumi is a Japanese politician and former Minister of the Environment, known as the son of former Prime Minister Junichiro Koizumi and a prominent younger figure in the Liberal Democratic Party.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Shinjiro Koizumi canonical | 9 |
How this entity was disambiguated
This entity first appeared as the object of triple T541738 — 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: Shinjiro Koizumi Context triple: [Junichiro Koizumi, relative, Shinjiro Koizumi]
-
A.
Tomoiichi Murayama
Tomoiichi Murayama is a Japanese politician who served as Prime Minister of Japan in the mid-1990s, leading a coalition government despite heading the traditionally opposition-oriented Japan Socialist Party.
-
B.
Jirō Minami
Jirō Minami was a Japanese general and colonial administrator who served as Governor-General of Korea during the later period of Japanese rule.
-
C.
Sakai Takashi
Sakai Takashi was an Imperial Japanese Army general best known for leading Japanese forces during the early Pacific War, including the invasion of Hong Kong.
-
D.
Nobutaka Machimura
Nobutaka Machimura was a prominent Japanese Liberal Democratic Party politician who held key cabinet posts, including Minister for Foreign Affairs and Chief Cabinet Secretary, and served as Speaker of the House of Representatives.
-
E.
Kakuei Tanaka
Kakuei Tanaka was a powerful and controversial Japanese prime minister and political kingmaker who dominated postwar politics through his influence within the Liberal Democratic Party.
- 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: Shinjiro Koizumi Target entity description: Shinjiro Koizumi is a Japanese politician and former Minister of the Environment, known as the son of former Prime Minister Junichiro Koizumi and a prominent younger figure in the Liberal Democratic Party.
-
A.
Tomoiichi Murayama
Tomoiichi Murayama is a Japanese politician who served as Prime Minister of Japan in the mid-1990s, leading a coalition government despite heading the traditionally opposition-oriented Japan Socialist Party.
-
B.
Jirō Minami
Jirō Minami was a Japanese general and colonial administrator who served as Governor-General of Korea during the later period of Japanese rule.
-
C.
Sakai Takashi
Sakai Takashi was an Imperial Japanese Army general best known for leading Japanese forces during the early Pacific War, including the invasion of Hong Kong.
-
D.
Nobutaka Machimura
Nobutaka Machimura was a prominent Japanese Liberal Democratic Party politician who held key cabinet posts, including Minister for Foreign Affairs and Chief Cabinet Secretary, and served as Speaker of the House of Representatives.
-
E.
Kakuei Tanaka
Kakuei Tanaka was a powerful and controversial Japanese prime minister and political kingmaker who dominated postwar politics through his influence within the Liberal Democratic Party.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
Japanese politician
ⓘ
human ⓘ |
| areaOfPoliticalActivity | Kanagawa Prefecture ⓘ |
| birthDate | 1981-04-14 ⓘ |
| birthPlace |
Yokosuka, Kanagawa Prefecture, Japan
ⓘ
linked to:
Yokosuka, Kanagawa, Japan
|
| cabinet |
Fourth Abe Cabinet
ⓘ
Suga Cabinet ⓘ |
| child | son (name not widely publicized) ⓘ |
| constituencyRepresented | Kanagawa 11th district ⓘ |
| countryOfCitizenship | Japan ⓘ |
| educatedAt |
Columbia University School of International and Public Affairs
ⓘ
linked to:
Columbia University
Kanto Gakuin University ⓘ |
| father | Junichiro Koizumi ⓘ |
| fieldOfStudy | political science ⓘ |
| gender | male ⓘ |
| generation | Heisei generation politician ⓘ |
| hasHonorificPrefix | Mr. ⓘ |
| hasSignaturePolicyArea |
climate change mitigation
ⓘ
environmental policy ⓘ work–life balance and childcare leave ⓘ |
| knownFor |
advocacy on environmental and climate issues
ⓘ
media-friendly public image ⓘ support for paternity leave as a cabinet minister ⓘ |
| languageSpoken |
English
ⓘ
Japanese ⓘ |
| legislativeBody | House of Representatives of Japan ⓘ |
| memberOfPoliticalParty |
Liberal Democratic Party of Japan
ⓘ
linked to:
Liberal Democratic Party
|
| name | Shinjiro Koizumi ⓘ |
| nativeName | 小泉進次郎 ⓘ |
| notableFor |
being a prominent younger figure in the Liberal Democratic Party
ⓘ
being the son of former Prime Minister Junichiro Koizumi ⓘ |
| occupation | politician ⓘ |
| officeEndTime (Minister of the Environment) | 2021-10 ⓘ |
| officeStartTime (Minister of the Environment) | 2019-09 ⓘ |
| parliamentaryGroup |
Liberal Democratic Party (Japan)
ⓘ
linked to:
Liberal Democratic Party
|
| partOf |
Koizumi political family
ⓘ
linked to:
Koizumi family
|
| politicalIdeology | conservative ⓘ |
| positionHeld |
Member of the House of Representatives of Japan
ⓘ
Minister of the Environment of Japan ⓘ |
| relative |
Christel Takigawa
ⓘ
Junichiro Koizumi ⓘ |
| religion |
Shinto (culturally associated)
ⓘ
linked to:
Shinto
|
| residence |
Yokosuka, Kanagawa Prefecture, Japan
ⓘ
linked to:
Yokosuka, Kanagawa, Japan
|
| spouse | Christel Takigawa ⓘ |
| startTime | 2009-08-30 ⓘ |
| workLocation |
Tokyo, Japan
ⓘ
linked to:
Tokyo
|
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: Shinjiro Koizumi Description of subject: Shinjiro Koizumi is a Japanese politician and former Minister of the Environment, known as the son of former Prime Minister Junichiro Koizumi and a prominent younger figure in the Liberal Democratic Party.
Referenced by (9)
Full triples — surface form annotated when it differs from this entity's canonical label.