Morioka Domain
During the Sengoku period, the area was dominated by various samurai clans before coming under the control of the Nambu clan during the Edo period, who ruled Morioka Domain under the Tokugawa shogunate. The Nambu built Nabekura Castle in what is now known as Nabekura Park in downtown Tōno as a defence against the powerful Date clan of Sendai Domain to then south, and assigned to Nanbu Naoyoshi, formerly castellan of Ne Castle near Hachinohe in 1627. This formed an unofficial subsidiary 12,500 "koku" domain of Morioka Domain, which lasted until the Meiji restoration.