Sejo of Joseon
7th King of Joseon Dynasty in Korean history (1417–1468)
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Updated 2026-05-29
Seventh Joseon king who staged a 1453 coup against his own nephew, forced an abdication, and eliminated rival brothers to cement power. Reformed administration, fought the Jurchens, and created Kyŏngguk Taejŏn, the legal backbone of Joseon rule.
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Sejo, personal name Yi Yu, sometimes known as Grand Prince Suyang, was the seventh monarch of Joseon. He was the second son of Sejong the Great and the uncle of King Danjong, whom he forced to abdicate in 1455, after having previously led a coup d'état against him in 1453. In his quest to seize power he ruthlessly killed rivals, including his younger brothers, Grand Prince Anpyeong and Grand Prince Geumseong. However, during his reign, he reformed administration, led campaigns against the Jurchens, revised land laws, promoted literature, and established court music. His Kyŏngguk Taejŏn became…
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Stable45.9
Composite of search demand, mentions, audience & graph footprint.
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Momentum10.0
Historical20.9
Source confidence60.0
Completeness60.0
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- WikipediaHigh confidencewikipedia · en.wikipedia.org
- WikidataHigh confidencewikidata · wikidata.org
- Pantheon 2.0High confidencedatabase · pantheon.world
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