Mitsunori's success led him to rule over land such as Tango Province and Mikawa Province; he became a dominant Shugo Guardian Feudal Lord holding three provinces, and established the height of power for the Isshiki family.
満範の活躍により、丹後の他、三河国なども治め、3ヶ国を有する有力守護大名となり、一色家の最盛期を築いた。