Aoshima Shell Mound

...The area is mostly made up of lowlands in the basin of the former Hasama River, a tributary of the Kitakami River, and the northwestern part is part of the Tsuchidate Hills. It is home to the Aoshima shell mound, known as an inland shell mound from the late Jomon period. In the Middle Ages, it came under the control of the Toyoma clan, a branch of the Nitta clan, and in the early modern period it became the property of the Tsuda clan, a senior vassal of the Date clan, but in 1757 (the 7th year of the Horeki era) it was abolished and came under the control of the Watari clan.

*Some of the terminology used in reference to the "Aoshima Shell Mound" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…北上川の支流，旧迫（はさま）川流域の低地が大部分を占め，北西部は築館丘陵に属する。縄文後･晩期の内陸型貝塚として知られる青島貝塚がある。中世には新田一族登米（とよま）氏の支配下となり，近世には伊達氏の重臣津田氏の所領となったが，1757年(宝暦7)に改易され，亘理氏が支配した。…

※「青島貝塚」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