According to the fact that after the Tenmon era, the clan assigned Kazumasa ISONO to Sawayama-jo Castle, which was originally the home castle of the Ogawa clan, and after Naikuranosuke DODO (the castle lord at that time) died in battle, instead of his home base Isonoyama-jo Castle, and the Atsuji clan to the Yamamotoyama-jo Castle, which was the headquarters of the Asami clan, it can be thought that the Azai clan was planning a kind of 'rotating stationary system of branch castles.'
磯野員昌を磯野氏本拠の磯野山城ではなく、元は小川氏の居城で百々内蔵助戦死後の佐和山城に置き、浅見氏の居城であった山本山城に阿閉氏を配した天文年間以降には支城在番制に近いものを構想していた様子も伺える。