However, it was highly possible that authorization to them were revoked upon the change of kokushi (provincial governors), and also, disputes with other kaihatsu-ryoshu often erupted over such elements as the border.
しかし、国司が交代すると認可を取り消される可能性も高く、境界などを巡って他の開発領主などと紛争が起こることもたびたびあった。