Shikano Castle Ruins

Shikano Castle stood on the summit of Mount Shiroyama above the town of Shikano and served as a strategic Yamana-clan stronghold during the Sengoku period, controlling the mountain route between Tottori and the Chugoku interior. In 1581, the castle was besieged by forces under Toyotomi Hideyoshi as a preliminary move ahead of his larger siege of Tottori Castle the same year; Shikano's fall helped cut off supply and reinforcement routes to the Yamana garrison at Tottori. The castle was abandoned not long after the Ikeda clan consolidated control of the region in the early Edo period, and no structures were rebuilt on the site, leaving the mountain's earthworks and stone foundations as the primary surviving evidence. Surveys of the site have identified terraced enclosures (kuruwa), dry moats cut into the ridge, and remnants of stone-faced embankments consistent with typical Sengoku-period mountain-castle (yamajiro) construction, which relied on natural terrain rather than large stone walls for defense. Because Shikano was a mountain fortress rather than a flatland castle with a keep, its layout is read primarily through earthwork contours, and on-site interpretation focuses on tracing the defensive terracing visible along the ascent trail. The site remains an unreconstructed archaeological ruin, valued by castle historians for illustrating Sengoku-period mountain fortification design in its unaltered form.