Nagamori Castle

Nagamori Castle was a historic military structure located in the Kiridōshi area of Gifu City within Gifu Prefecture, Japan. Originally constructed in 1185 by Tosanobō Shōshun, who served as the local steward during the late Heian period, the fortress stood as a significant regional stronghold for several centuries. Its strategic position in Mino Province allowed it to function as a central base of operations through the transition from the Heian period into the early Sengoku period. The castle represents an example of medieval Japanese military architecture designed to control local territories before the widespread adoption of larger, more complex castle complexes that characterized later eras.

The historical significance of Nagamori Castle is closely tied to the powerful Toki clan. During the Nanboku-chō period in 1339, Toki Yoritō, the provincial governor, relocated his headquarters from Toki City to this site to better manage his domain. However, the castle's tenure as the primary seat of power was relatively brief. Toki Yoriyasu subsequently commissioned the construction of the more spacious Kawate Castle nearby, prompting a shift in administrative focus. Following the dismantling of Nagamori Castle in the early sixteenth century, a Jin'ya administrative office was erected on the same grounds to continue local governance until Kawate Castle assumed full responsibility.

By the time the notorious warlord Saitō Dōsan gained control of the region, Nagamori Castle had already been demolished, leading him to establish his base at the formidable Inabayama Castle instead. Today, the original structure no longer exists, and little remains of its physical form beyond historical records. While the site once hosted both a major defensive fortress and a subsequent government office, it currently holds no standing buildings. The location serves primarily as a point of historical interest within Gifu, marking the spot where regional power dynamics shifted repeatedly during Japan's turbulent feudal history.