 2,000 – 1,500 BC) archaeological site in the city of Kazuno, Akita Prefecture, in the Tōhoku regionof northern Japan.The site consists of two large stone circleslocated on an artificially flattened plateau on the left bank of the Oyu River, a tributary of the Yoneshiro River in northeastern Akita Prefecture.The site was discovered in 1931, with detailed archaeological excavations taking place in 1946, and in 1951-1952.