Oku seven districts

Japanese: 奥七郡 - おくしちぐん

...In Shinano, the northern counties of Sarashina, Hanishina, Minauchi, Takai, etc. were called Oku Shinano, and in the Sengoku period, there were examples of the term Shinshu Oku District and Shino no Oku District. In Hitachi, too, the northern counties of Naka East and West, Kuji East and West, Satsuma East and West, and Taga, which came under the control of the Satake clan, were called the Oku Seven Districts at the end of the Heian period and the beginning of the Kamakura period. In the Hida Province Field Farm Toshin Michuran of 1166 (Jin'an 1), Oku District is listed alongside Masuda District, so it is thought to refer to Yoshiki and Ono Districts. ...

From Hitachi Province

… [Mizuho Iida]
【middle ages】

[Late Heian period]
In Hitachi Province, the manor and public land system also clearly emerged in the 12th century. In the north, the three districts of Taka, Kuji, and Naka under the ritsuryo system were divided into seven districts: Taka, Kuji East, Kuji West, Sato East, Sato West, Naka East, and Naka West, collectively known as the "Seven Oku Districts." The northern five of the seven districts are thought to have been under the control of the Satake clan.

*Some of the terminology that refers to the "Oku Seven Counties" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…信濃では北部の更級，埴科，水内，高井などの諸郡を奥信濃といい，戦国時代にも信州奥郡，信之奥郡などの用例がある。また常陸でも，平安末･鎌倉初期，佐竹氏の支配下におかれた那珂東西，久慈東西，佐都東西，多賀など北部の諸郡を奥七郡といった。1166年(仁安1)飛驒国田畠所当進未注文では，奥郡は益田郡と並記されているので，吉城，大野郡をさすとみられる。…

【常陸国】より

…【飯田瑞穂】
【中世】

［平安末期］
　常陸国でも12世紀になると，荘園公領制が明確にその姿を現してくる。北部では，令制の多珂，久慈，那珂3郡は，多珂，久慈東，久慈西，佐都東，佐都西，那珂東，那珂西の7郡に分割され，総称して〈奥七郡〉と呼ばれた。7郡のうち北部5郡は佐竹氏一族の支配下にあったとみられる。…

※「奥七郡」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

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