The Abe clan established its foothold in Okuroku-gun (inland six districts, at present the inland area of Iwate Prefecture) surrounding the Kitakami-gawa River, and exhibited great influence on the vast regions from Nukanobu (at present the eastern part of Aomori Prefecture) to Watari and Igu (at present the southern part of Miyagi Prefecture).
安倍氏は北上川流域の奥六郡（現在の岩手県内陸部）を拠点として糠部（現在の青森県東部）から亘理・伊具（現在の宮城県南部）にいたる広大な地域に影響力を発揮していた。