Daijouji

Japanese: 大掾氏 - だいじょううじ

A powerful clan in Hitachi Province from the late ancient period to the Middle Ages. It is said that Kunika, the son of Emperor Kanmu's great-grandson Takamochi, was appointed Hitachi Daijo and settled there. Kunika's son Sadamori defeated his kinsman Masakado in the Taira no Masakado Rebellion and built up influence in the region. His son Koremoto (also said to be the son of Sadamori's younger brother Shigemori) and grandson Tamemichi inherited the position of Hitachi Daijo and took the title Daijo as their own surname. From the 12th century onwards, the clan controlled almost the entire southern half of Hitachi Province. At the beginning of the Kamakura period, the main branch of the clan, Daijo Yoshimoto, and his brother Shimotsuma Hiromoto, were ousted, and the clan of Shugo Hatta Tomoie advanced into their territories, but the position of Daijo was inherited by a branch of the family, Baba Sukenori.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:

古代末期～中世の常陸国の豪族。桓武天皇の曾孫高望の子国香が常陸大掾に任官して，土着したと伝える。国香の子貞盛は平将門の乱で同族の将門を破り，この地方に勢力をたくわえた。その子の維幹(一説には貞盛の弟繁盛の子ともいう)，孫の為幹と常陸大掾の職を世襲，職名の大掾をみずからの名字とした。12世紀以降，一族は常陸国の南半分をほぼ勢力下においた。鎌倉時代の初め，本宗の大掾義幹と弟の下妻広幹は失脚，両者の支配領域へは守護の八田知家の一族が進出するが，大掾職は庶流の馬場資幹に継承された。

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

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