At the time of Akitaka SHIBA, it actively expanded its territory as it attacked the TOZAWA clan of Shizukuishi, Iwate-gun County (Shizukuishi cho, Iwate Prefecture) ousting the clan to Kakunodate.
斯波詮高の代には岩手郡滴石(岩手県雫石町)の戸沢氏を攻略し、角館へ退去させるなど積極的な拡大も見られた。