According to "Daisenji engi (tales of the origin of Daisen-ji Temple)," the clan stepped in the conflict of Daisen-ji Temple in 1144 and by that time, the Ki clan had become so influential that they and the Ogamo clan of Higashi Hoki could divide Hoki Province into two.
『大山寺縁起』によれば康治3年（1144年）の大山寺内の抗争に関与し、この頃には東伯耆の小鴨氏と並んで伯耆国を二分するまでの勢力となっていた。