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Castle in Kanegasaki,Iwate

1.Tonomi Palisade
Tonomi Palisade (鳥海柵, Tonomi-no-saku) was an early Heian period jōsaku-style Japanese castle located in what is now the town of Kanegasaki in Isawa District, Iwate Prefecture in far northern Honshū, Japan. The site was proclaimed a National Historic Site of Japan in October 2013.[1]
Wikipedia  detail