Defensive Positions focuses on the role of regional domains in early modern Japan's coastal defense, shedding new light on this system's development. This examination, in turn, has significant long-term political implications for the involvement of those domains in Tokugawa state formation. Noell Wilson argues that domainal autonomy in executing maritime defense slowly escalated over the course of the Tokugawa period to the point where the daimyo ultimately challenged Tokugawa authorities as the primary military interface with the outside world. By first exploring localized...