Sunpu Castle
Ieyasu relocated to Sunpu Castle in 1586, entrusting Hamamatsu Castle to Horio Yoshiharu, who was followed by his son Horio Tadauji. Under Horio Yoshiharu, the castle was renovated in line with contemporary advances in stone ramparts, and was expanded in size. Contemporary records indicate that the castle was never built with a "tenshukaku"-style keep. Throughout its history, a two-story "yagura" located within the second bailey served as a substitute keep.