Innoshima-so

… [Kenzo Fujiwara]
[history]
The first time Innoshima was mentioned in the entry for December 15, 878 (Gankei 2) in the Sandai Jitsuroku, where it says that Innoshima was given the rank of Hidden Island God of Bingo Province without a rank, and in the Wamyōshō (Kozan-ji edition) Innoshima is recorded as a town in Mitsugi County. In 1191 (Kenkyū 2), the island appears in the list as one of the Chokōdō territories, and is called simply Innoshima (later Innoshima Manor). At the time the island became a manor, Innoshima contained smaller units within it, but it is believed that it was still a single entity as a whole. In 1276 (Kenji 2), during the mid-Kamakura period, Innoshima was divided into three areas: Mitsu Manor, owned by Joko-in; Innoshima Naka Manor, owned by Senyomon-in; and Shigeiura (later Shigei Manor), owned by the same empress. The lords of each area were members of the Hojo clan, and it is believed that the island was a Tokuso territory throughout the Kamakura period.

*Some of the terminology that refers to "Innoshima-so" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…【藤原 健蔵】
［歴史］
　《三代実録》元慶2年(878)12月15日条に〈授備後国無位隠島神従五位下〉とあるのが初見で，《和名抄》(高山寺本)には御調（みつぎ）郡の郷として因島が記されている。1191年(建久2)長講堂領の一つとして目録に姿を現すこの島は，単に因島(のち因島荘)といわれており，島が荘園となった時点には因島は内に小単位を含みつつも，なお全体として一個の単位だったと思われる。鎌倉中期の1276年(建治2)因島は，常光院領三津荘，宣陽門院領因島中荘，同女院領重井浦(のち重井荘)の3ヵ所に分かれており，それぞれの地頭は北条氏一門で，以後鎌倉時代を通じて得宗領だったと思われる。…

※「因島荘」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