Kitō

Kitō lies in southern Tōtōmi, near the coast and the routes across the province. In 1574 Takeda Katsuyori captured Takatenjin Castle, threatening Tokugawa positions. To press the frontier eastward and prepare its recovery, Tokugawa Ieyasu ordered his retainer Ōsuga Yasutaka to build Yokosuka Castle in 1578. The stronghold took shape over the next two years, forming part of the network of fortresses used in the struggle for Tōtōmi.