Navies in those days had strongholds along Maizuru Bay and according to the Tanabe Kyuki (the old record of Tanabe), the lord of the castle of which ruins remained in the village called Sabaka in Maizuru City was Shichiro Zaemon SHIMOJIMA.
当時の水軍は舞鶴湾沿いに根城を持っており舞鶴市の佐波賀という集落に残る城跡の城主は田辺旧記によると下志万七郎左衛門であったとされる。