
Guida
The Sakamoto Castle Ruins are located in Shimosakamoto, Otsu City, Shiga Prefecture. This site once held a magnificent fortress that was said to rival the scale and splendor of the famous Azuchi Castle. Today, the area has been developed into a castle ruin park. Although it is now surrounded by residential urban areas, it remains a vital site for understanding the layout and strategic importance of ancient Japanese fortifications. Situated at a vital transport junction facing Lake Biwa, this castle played a crucial political and military role in the region.
Legend has it that Sakamoto Castle was constructed by Akechi Mitsuhide under the orders of Oda Nobunaga. It functioned as a key stronghold to monitor the movements near Mount Hiei and to protect the 'Imadogoe' route, a vital passage to Kyoto. Historical records describe a grand structure featuring a high main keep and a smaller keep. The famous Jesuit missionary Luis Frois even remarked that it was the second most magnificent castle in the land after Azuchi Castle. However, following the Honno-ji Incident, the castle fell and its role as a major fortification ended. During the Edo period, the site was repurposed into farmland and residential areas, but its historical significance continues to be a subject of academic study.

While the original major buildings no longer exist, the park preserves elements that allow visitors to feel the presence of the past. You can find diagrams, documents, and stone monuments illustrating the original castle layout (Nawabari), providing a visual understanding of its former structure. Additionally, the natural topography and the flow of nearby rivers offer clues as to how the castle utilized the natural environment for defense. At certain times, observing the landscape can provide a profound sense of how the terrain has evolved over centuries.
The Sakamoto Castle Ruins Park is open 24 hours a day, making it a perfect spot for a casual stroll at any time. The surrounding vegetation and scenery change beautifully with the seasons, making it an ideal destination for seasonal walks. Spending time reading the historical explanations in a quiet environment while gazing at the terrain is a deeply rewarding experience for history enthusiasts. Daytime is highly recommended, as the bright light makes it easier to grasp the topographical layout and the structural history of the site.
Visitors can enjoy a historical walking tour through the ruins. By using the provided reconstruction diagrams and maps, you can walk through the area while visualizing the locations of the former main keep (Honmaru), the secondary enclosure (Ninomaru), and the water gates. The surrounding area also features several temples and local legends related to former castle lords, allowing for a walking tour that connects the castle to the broader historical context of the region.
The area around the park is dotted with sites of significant historical value. For instance, nearby temples like Tosei-ji contain monuments related to historical figures. Furthermore, the famous Hiyoshi Taisha Shrine is located nearby, making it easy to combine a visit to the castle ruins with a broader historical exploration. While the area is now a residential and urban zone, it retains much of its historical atmosphere, serving as an excellent base for anyone wishing to deeply understand the history of Otsu City.