Mimuroto-ji Temple is said to have been founded by the monk Gyohyo of Nara Taian-ji Temple at the request of Emperor Konin during the end of Tenpyo era (729 - 748).
光仁天皇の御願により奈良大安寺の僧行表が天平年間（729年～748年）の末期に創建したものと伝わる。