Amago clan
In one of the more significant sieges, the Ōtomo clan lost the castle to the Mōri clan in 1569, who had become one of the most skilled and powerful clans in the field of naval warfare; their use of Western-style cannon granted them a large advantage in this battle. They abandoned it soon afterwards, however, following a defeat at Tatarahama to an allied Ōtomo-Amago clan force.