Guida
The Usuki Castle Ruins are located in Usuki City, Oita Prefecture. This historical site dates back to the 16th century (around 1562–1566) during the Eiroku era, believed to have been constructed by Otomo Sochin. It is also known as "Nyubashima Castle" or "Kame Castle" (Turtle Castle) due to its unique shape. Today, parts of the site are maintained as a public park, where visitors can see original structures such as watchtowers, stone walls, and dry moats. The design is particularly notable for its defensive capabilities, utilizing the natural topography of an island-like terrain.
While there are various theories regarding its construction, the most prominent is that it was built by the Otomo clan. The castle was originally built in a place called Nyubashima, and its resemblance to a turtle earned it the nickname "Kame Castle." The fortification process was largely completed during the transition of power between the Otomo and the Inaba clans. Over time, the structure evolved to enhance military functions, such as the construction of the San-no-maru area around the Gionsu area during the Keicho era (1596–1599). Although much of the castle was dismantled in 1873, the preserved ruins serve as a vital testament to the region's rich history.
The Usuki Castle Ruins (currently Usuki Park) preserve several significant structures that showcase ancient Japanese fortification techniques. Key features include the Utotoguchi Gate Watchtower and the Tatami Watchtower. Visitors can also explore the dry moats, gate sites, well remains, and impressive stone walls, which provide a clear picture of the castle's original scale and defensive layout. The way the architecture integrates with the natural terrain is a highlight of the site.
The most spectacular time to visit is from March to April, when the cherry blossoms are in full bloom. The park is transformed into a sea of soft pink, attracting many visitors for hanami (flower viewing). For the best experience, visiting during bright daylight hours is ideal. If you wish to observe the intricate details of the stone walls and historical structures, a clear, sunny day is highly recommended.
Visitors can enjoy a historical stroll to learn about Japanese castle architecture. Walking through the ruins of the gates, moats, and walls allows you to experience the atmosphere of a former military stronghold. The well-maintained paths make it an excellent place for a relaxing walk amidst nature and history. During the spring season, a walk through the falling cherry blossoms is a truly unforgettable experience.
The castle ruins are now a beloved public park and a place of relaxation for local citizens. The surrounding area still retains the atmosphere of an old castle town, allowing visitors to explore the historical context of the region while walking through the neighborhood.
We recommend wearing comfortable walking shoes and clothing suitable for light hiking, as the park contains stone walls and uneven surfaces. While there is no entrance fee to the park, please carry cash if you plan to use nearby local facilities. English signage is limited, so it is helpful to be aware of basic historical terms. No advanced reservations are required for entry.