Sumoto Castle Ruins

Sumoto Castle Ruins (洲本城, Sumoto-jo) are perched high on Mount Mikuma, offering breathtaking views of the surrounding landscape, including the sea, the town of Sumoto, and distant sights such as Wakayama and Kansai Airport. While the original castle was dismantled during the Edo Period, much of the stone walls and pathways have been preserved, providing a glimpse into the past. The peaceful walk up to the ruins takes visitors through lush nature and panoramic vistas, making it a perfect spot for a leisurely stroll and to enjoy stunning views.

Built in 1526 by Atagi Haruoki, Sumoto Castle was later expanded by commanders under Toyotomi Hideyoshi to defend Osaka. Though its role as a military fort was brief, the castle played an important part in Japan’s feudal history. At the base of the mountain, visitors can explore the Awajishima Museum, which displays a range of historical artifacts from the castle’s past. In 1928, a concrete keep was added, making it Japan’s oldest reconstructed keep, though it is more of a symbolic structure than an authentic reproduction.