The castle once featured a prominent four-story main keep and a smaller secondary keep, connected by a roofed passage.
Construction was largely directed by Nakamura Kazutada, who was appointed as the lord of the province in 1600.
The castle served as a key naval base due to its proximity to the natural harbors of Lake Nakaumi.
Much of the stone used in the fortification was repurposed from the nearby Ueda Castle.
The base of the castle was historically protected by the Kamo River, which acted as a natural moat.
The ruins represent the pinnacle of early Edo-period castle stone-masonry techniques in the San'in region.
Yonago-jō ato Castle Ruins sits atop Minatoyama Hill, offering a 360-degree panorama of the Sea of Japan, Lake Nakaumi, and Mount Daisen. Originally constructed in the late 16th century, the castle functioned as a strategic coastal fortress for the Yonago domain. While the main structures were dismantled in the Meiji era, the massive stone walls and foundation remain intact. The site is accessible via a steep walking path that leads from the base of the hill to the former keep's footprint. It is recognized as one of the 100 Great Castles of Japan. The vantage point provides clear views of the Tottori coastline and the surrounding cityscape of Yonago.
From the very top of the highest stone foundation, facing toward Mount Daisen for a contrast of mountains and ruins.
Wear sturdy walking shoes, as the path to the summit is unpaved and involves uneven stone steps.
Carry water with you, as there are no shops or vending machines available once you reach the summit area.
Apply mosquito repellent during summer months, as the wooded hillside path is prone to insects.
Do not attempt the ascent during or immediately after heavy rain, as the hillside path can become slippery.
Remain on marked paths to protect the historical stone foundations and refrain from climbing on the ruins.
