
Guida
Kasama Castle Ruins is a historic fortress located on Mt. Sashiro in Kasama City, Ibaraki Prefecture. Originally constructed by Kasama Tokiasa during the Kamakura period, the site has been protected by various lords for approximately 750 years. Today, it is recognized as one of the '100 Famous Castles of Japan' (Zoku Nihon 100 Meijo). The site features the remains of a medieval defensive structure, including stone walls and moats centered around the castle summit (Tenshu Kuruwa). Its design utilizes the natural topography for defense, making it a fascinating destination for both history enthusiasts and those who enjoy nature walks.
The history of Kasama Castle dates back to around 1205, when Kasama Tokiasa built a lower castle at the foot of Mt. Sashiro. By 1219, a more formidable fortress was established at the summit. This region served as a vital strategic point, ruled by the Kasama and Utsunomiya clans through the Kamakura period, and later by various lords until the end of the Edo period. Although many structures were dismantled during the Meiji era due to government decrees, the stone walls and moats remain as enduring symbols of the region's historical significance.

The most striking feature is the Tenshu Kuruwa (castle summit) at the top of Mt. Sashiro. Here, you can sense the presence of the former castle tower. The area also houses the Sashino Shrine, creating a unique landscape where ancient fortification and spiritual worship blend together. Additionally, unlike many other castles in the Kanto region, this site is notable for its extensive use of stone walls along the castle walls and main paths. Nearby, the remains of the Hachiman-dai Yagura (a designated Ibaraki cultural property) add further depth to the historical experience.
Kasama Castle Ruins offers beautiful scenery throughout the seasons: fresh greenery in spring, lush landscapes in early summer, vibrant autumn foliage, and a serene, quiet atmosphere in winter. We recommend visiting during bright, clear days to easily observe the intricate details of the stone walls and moats. Morning visits are particularly pleasant, as the air is crisp and clear, providing excellent conditions for photography against the historical backdrop.

The primary activity here is a 'historical walk.' Walking along the traces of the stone walls and moats allows you to imagine the defensive structures of the past, providing a sense of immersion that books cannot offer. Visiting the Sashino Shrine at the summit is also a key cultural experience. While the terrain is natural, it is more of a light hike than a strenuous climb, making it an enjoyable way to learn about Japanese history while being active in nature.
The area surrounding the castle is steeped in local culture, most notably the famous 'Kasama-yaki' pottery. After your historical exploration, we recommend visiting nearby pottery studios or cafes to experience traditional craftsmanship. The area around the foot of Mt. Sashiro is well-maintained as a park, offering a relaxing environment where history, tradition, and nature harmonize beautifully.