Ōtoriiyama ruins
| The Ōtoriiyama ruins (大鳥井山遺跡, Ōtoriiyama iseki) is an archaeological site containing a large Heian period jōsaku-style fortification located in what is now part of the city of Yokote, Akita in the Tōhoku region of Japan. The site was designated a National Historic Site of Japan in 2010.[1] | ||||||
| Type： yamashiro-style Japanese castle | ||||||
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