大友氏
During the age of civil wars a "daimyō" with leading Shinto priest and Munakata Ujisada of Munakata Shrine established Tsutagadake castle (Mount Jo). Through this, Munakata, Onga and Kurate were protected from invasion by other daimyos such as Tachibana Dōsetsu and the Ōtomo clan. There are also ghost stories connected with the area since the Yamada incident arose.