The History of Sunomata Castle
The Legend of Its Construction
In 1566, during the Eiroku era, Oda Nobunaga is said to have ordered the construction of a castle at Sunomata as a strategic base for his campaign to conquer Mino Province, which corresponds roughly to present-day Gifu Prefecture.
Kinoshita Tōkichirō, later known as Toyotomi Hideyoshi, was reportedly entrusted with the task and completed the castle in a single night. This remarkable story became known as the legend of the “One-Night Castle” and was passed down as one of the most famous episodes in Hideyoshi’s rise to power.
Strategic Importance
Sunomata Castle served as an important military foothold in Nobunaga’s campaign against the Saitō clan, his rivals in Mino Province. Establishing a base at Sunomata helped Nobunaga advance his conquest of the region and contributed to the series of campaigns that eventually paved the way for the unification of Japan.
The Castle’s Structure
The castle stood beside a river, making use of the surrounding waterways as a natural defensive advantage. Although the precise layout of the original fortification remains unclear, it is generally thought to have been a relatively simple structure built rapidly, consistent with the traditional account of its construction in a single night.
From Military Stronghold to Historic Landmark
After Nobunaga consolidated his control over Mino Province, Sunomata Castle lost its strategic purpose and was eventually abandoned. Its historical significance, however, endured. The site was developed into a tourist attraction, and a castle-style reconstruction was created in 1989. The historical museum introduces the story of Sunomata Castle and its place in Japan’s Warring States period.
The Sunomata Ichiya Castle Historical Museum
The historical museum stands on the former castle site and presents materials relating to the castle’s history, the legend of its rapid construction, and the lives and campaigns of Oda Nobunaga and Toyotomi Hideyoshi.
The exhibits provide an opportunity to explore the castle’s place in the history of the Warring States period while considering the stories that contributed to Hideyoshi’s enduring reputation.
A Historical Mystery
Despite the fame of the One-Night Castle legend, the story remains historically uncertain. Although the construction of a castle at Sunomata would have been a significant event for both Oda Nobunaga and Toyotomi Hideyoshi, contemporary historical sources, including the Shinchō Kōki, a chronicle of Nobunaga’s life, contain little or no clear information confirming the episode.
This lack of documentary evidence has made Sunomata Castle an intriguing subject for historians. Visitors can explore not only the traditional story but also the unanswered questions surrounding the castle’s origins and construction.
Sunomata Castle Today
The former castle grounds have been developed into a park, with the reconstructed castle serving as its centerpiece. The historical museum introduces the site’s past, while the surrounding grounds offer a pleasant place to walk and appreciate the area’s history and scenery.
The castle remains particularly fascinating because the truth behind the One-Night Castle legend has yet to be definitively established. It offers visitors a chance to encounter both the history and the enduring mysteries of Japan’s Warring States period.
A Famous Cherry Blossom Destination
Sunomata Ichiya Castle is also renowned as a cherry blossom viewing destination. Along the banks of the Sai River, approximately 800 cherry trees form a blossom-lined avenue stretching for 3.7 kilometers.
Walking beneath the flowering branches leads visitors toward the castle-style historical museum, where the combination of traditional castle architecture and delicate cherry blossoms creates a memorable seasonal scene.
The cherry trees typically come into bloom around April, attracting large numbers of visitors. During the blossom season, the area is illuminated at night, allowing visitors to enjoy the beautiful sight of the castle framed by illuminated cherry trees.