However, the confrontation with the Isshiki clan which was his arch rival in the Tango Province kept going back and forth, and he finally attacked the Isshiki clan being reinforcemed by the Asakura clan in the Echizen Province during the invasion of Wakasa by the Isshiki clan.
しかし、宿敵である丹後国一色氏との対立は一進一退の状況が続き、一色氏の若狭侵攻の際には越前国朝倉氏の援軍により、ようやくこれを撃退している。