Oshu family

…The fifth head of the Shimazu clan, Sadahisa, handed over the position of Shugo of Satsuma Province to his third son, Morohisa, and the position of Shugo of Osumi Province to his fourth son, Ujihisa. Morohisa's lineage is called the Sōshū family, and Ujihisa's lineage is called the Oshū family. Morohisa's lineage was based in Ikariyama Castle in Kawauchi, and Ujihisa's lineage was based in Tofukuji Castle in Kagoshima, and they managed the affairs together. …

*Some of the terminology that refers to the "Oshu family" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…島津氏5代貞久は3子師久（もろひさ）に薩摩国守護職を譲り，4子氏久に大隅国守護職を譲った。師久の統を総州家と呼び，氏久の統を奥州家と呼ぶ。師久は川内碇山城，氏久は鹿児島東福寺城を拠点に協力して経営に当たった。…

※「奥州家」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