This caused a cessation of conflict with the Ouchi clan from the Muromachi period, and local lords subject to the Ouchi family in the Kitakyushu region became subject to the Otomo family as well, by which he ensured a power of influence in Suo and Nagato Provinces.
これにより室町時代を通した大内氏との対立に終止符を討つと共に北九州における大内家に服属する国人が同時に大友家にも服属することになり、周防・長門国方面にも影響力を確保した。