Senjoyama (615 m) in Kotoura Town is a National Historic Site known as the mountain refuge of Emperor Go-Daigo during the Genko Rebellion of 1331. The summit plateau, ringed by sheer cliffs, formed a natural fortress where the emperor held out against the Kamakura shogunate's forces for a period before eventually being exiled to Oki Island. Now designated a prefectural natural park, the flat, ship…

In 1331, after the fall of Kasagiyama, Emperor Go-Daigo established his mountain headquarters here in his bid to overthrow the Kamakura shogunate. Supported by Nawa Nagatoshi, he gathered warriors from across the San'in region, but was eventually surrounded by shogunate forces and sent into exile on…