In addition, the northern compound has a furrow-shaped dry moat (remains of a vertical-sided moat) that exists only in Kameoka City, which, judging from its form, appears to have undergone modification during the rule of Mitsuhide AKECHI.
また、北側曲輪には亀岡市ではここだけにしか存在しない畝状空堀（竪掘跡）があり、形状から明智光秀時代の改修が指摘されている。