It is thought that early examples of them were Masashige KUSUNOKI's Chihaya Castle and Akasaka Castle as well as Kontaiji Castle, which used the mountain temple "Kontai-ji."
その初例と考えられているのは楠正成の千早城や赤坂城、または山岳寺院「金胎寺」を利用した金胎寺城がある。