The Inbe clan spread in such regions as Hokuriku (Echizen Province; the eastern part of Fukui Prefecture), Sanin (Izumo Province, Oki Province; Oki Island of Shimane Prefecture) and Sanyo (Bizen Province; the south-eastern part of Okayama Prefecture).
北陸地方（越前国）、山陰地方（出雲国、隠岐国）、山陽地方（備前国）などにも忌部氏はいる。