Guida
The Hon-Sakura Castle Ruins is a mountain castle designated as a national historical site, spanning the areas of Sakura City and Shisui Town in Chiba Prefecture. The most striking feature of this site is its identity as a 'Castle of Earth.' Unlike many Japanese castles that rely on stone walls, this fortress was constructed using massive dry moats (karabori) and earthen embankments (dorui), making it one of the most formidable defensive structures in the Kanto region. During the Sengoku period, this land served as the strategic stronghold for the noble Chiba clan for approximately 100 years, flourishing as a center of politics, economy, military, and culture. Today, visitors can witness the remnants of the high-level fortification techniques of that era, including the deep dry moats and the traces of the 'kuruwa' (enclosures) where the lord's residence once stood, all set within a beautiful, natural landscape.
The history of Hon-Sakura Castle dates back to the Bunmei era (1469–1486). It was established by the Chiba clan, the lords of Shimosa, on this land overlooking Inba Marsh. As warfare intensified in the Kanto region, the Chiba clan moved their base from the original Chiba Castle to this location, developing it into a vital political and military hub. In 1590, during Toyotomi Hideyoshi's Odawara campaign, the Chiba clan fell alongside the Hojo clan, and the castle subsequently came under the control of the Tokugawa clan. This site preserves the turbulent history of the transition from the Sengoku to the Azuchi-Momoyama period and is highly regarded today as one of the 'Top 100 Japanese Castles' (Zoku Nihon 100 Meijo).
The main castle ruins contain various structures that illustrate the defensive functions of the time. Key areas to visit include:
The ruins offer different charms throughout the seasons. In spring, blooming plum blossoms add a touch of elegance to the historical scenery. As a mountain castle, a walk through the lush greenery of summer or autumn makes the undulating shapes of the earthen embankments even more vivid. We recommend visiting during bright daylight hours, as the depth of the dry moats and the contours of the terrain are much easier to observe and appreciate under direct sunlight.
The primary activity here is 'Castle Ruin Exploration.' As you walk along the maintained paths, you can observe the three-dimensional defensive structures and imagine how Sengoku-era warriors fortified their positions. For castle enthusiasts, the site also offers the opportunity to collect 'Goshuin' (castle stamps) or 'Goshu-in' (castle seals), providing a physical connection to Japan's historical traces.
The Hon-Sakura Castle Ruins are located in a nature-rich environment. The surrounding areas of Shisui and Sakura feature traditional historical streetscapes. After your walk through the ruins, you can enjoy the local culture and the peaceful atmosphere of the nearby towns.
As this is a mountain castle site, the terrain includes unpaved paths and significant slopes. We strongly recommend wearing comfortable walking shoes and practical clothing. Please be mindful that the site is adjacent to private lands and agricultural fields; please respect the local residents and avoid entering private property.