日光街道
Mibu Castle lacked a "donjon" or "yagura", and had two sets of concentric moats with earthen ramparts. In the center bailey was a palace used by the daimyo as their residence and administrative center. The palace was also used by the early Tokugawa shōgun as a resting place on their way to worship at the Nikkō Tōshō-gū complex, as Mibu was located on the Nikkō Kaidō.