Ungen

...The first appearance in historical documents was in 51 (Nihei 1). Tadamasa's son Wakamaru became the mountain monk of Mount Hiei, Niu Dewabo Ungen, and in 78 (Jisho 2), he was appointed as a public official by the head of the province. He fought in the Jisho-Juei civil war under the command of Inaniwa Tokisada, the largest local official in Wakasa, and became a retainer of the Kamakura Shogunate. Ungen invited his teacher Kaiun to this area, and in 73 (Joan 3), he built Yakushido and entrusted him with his own territory, Suemuna, while Kaiun further developed the Bajomen in 86 (Bun'ei 2). ...

*Some of the terminology explanations that mention "Yunyan" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…史料上の初見は51年(仁平1)。忠政の子若丸は叡山の山僧丹生出羽房雲厳となり，78年(治承2)知行国主により公文職に補任され，治承･寿永の内乱を若狭最大の在庁官人である稲庭時定の指揮下で戦い，鎌倉殿御家人になった。雲厳は師の凱雲をこの地に招き，73年(承安3)薬師堂を建立，自己の所領末武名を預け，一方，凱雲はさらに86年(文治2)馬上免を開発する。…

※「雲厳」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