Sejo - The founder

The seventh king of the Joseon Dynasty (reigned 1455-68). His given name was Ju. He was the second son of the fourth king, Sejong. Before ascending to the throne, he was called Suyangdaegun. In 1453, after his nephew Danjong (reigned 1452-55) ascended to the throne, he murdered Hwangbo-in and other senior officials, seized power (Kiyu-seinan), and then passed on the throne to him. He strengthened his royal authority by improving the governing system, such as reforming the government system, establishing a military system (the Owei system), enacting the law on land and revising the amount of tribute, and compiling the "Great Code of Governance." He also suppressed the rebellion of the northeastern local lord Li Shi-ai, and attacked the Jurchens outside the border, increasing his military might and bringing the kingdom to its peak.

[Kenichi Kasuya]

Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend

朝鮮、李朝(りちょう)第7代の王（在位1455～68）。諱(いみな)は(じゅう)。第4代世宗の第2子。即位前は首陽大君を称した。甥(おい)の端宗（在位1452～55）即位後の1453年、皇甫仁(こうほじん)らの重臣を殺害して政権を握り（癸酉靖難(きゆうせいなん)）、ついで王位を譲られた。官制改革、軍制（五衛制）の確立、職田(しょくでん)法の制定と貢物上納量の改定、『経国大典』の編纂(へんさん)など、統治体制の整備を進めて王権を強化する一方、東北の土豪李施愛(りしあい)の反乱を鎮圧し、国境外の女真(じょしん)を攻撃して武威をあげ最盛期をもたらした。

［糟谷憲一］

出典　小学館　日本大百科全書(ニッポニカ)日本大百科全書(ニッポニカ)について　情報 | 凡例