Kim Yu-cho - Kim Yu-cho

…With this wealth and military power as a backdrop, he was granted the title of Cheonghaejin Ambassador by King Heungdeok in 828, and gained maritime rights in the Yellow Sea and East China Sea areas, and also gained influence in Sillabang, a settlement of Silla people in Tang China. Cheonghaejin took on the character of a local independent government. In the midst of the struggle for the throne (Kim Heonchang Rebellion) and local rebellions that began at the end of the 8th century, he protected Kim Yujeong, who had lost the battle for the throne after King Heungdeok's death and fled the royal capital (Gyeongju), defeated King Minae, helped King Jinmu (Yujeong) ascend to the throne in 839, and was made General of the Sea by the succeeding King Munseong. However, he failed to obtain the position of the king's in-laws, and rebelled in 841, leading to his death assassination. …

*Some of the terminology explanations that mention "Kim Yu-jeong" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…この財力と兵力とを背景に，828年興徳王により〈清海鎮大使〉の称号を認められ，黄海，東シナ海方面の海上権をにぎって在唐新羅人居留地である新羅坊にも勢力をつちかい，清海鎮は地方独立政権ともいうべき性格をおびた。8世紀末に始まる王位継承の争乱(金憲昌の乱)と地方の反乱のなかで，興徳王没後の王位争奪戦に敗れ王京(慶州)を逃れた金祐徴を庇護し，閔哀王（びんあいおう）を倒して839年神武王(祐徴)即位をたすけ，つづく文聖王に鎮海将軍とされる。だが，王の外戚の地位をねらって得られず，841年反乱を起こし，暗殺された。…

※「金祐徴」について言及している用語解説の一部を掲載しています。

出典｜株式会社平凡社世界大百科事典 第２版について | 情報