Guide
Minakuchi Castle Ruins is a historic site located in Koka City, Shiga Prefecture. It holds a significant place in history, having been developed as a lodging for Tokugawa Iemitsu, the third Shogun of the Edo Shogunate, during his travels to Kyoto. Due to its use of natural spring water for its moats, it was also known by the name 'Hekisui-jo' (Azure Water Castle). Today, the site is home to the Minakuchi Castle Museum, which features a reconstructed corner turret (sumiyagura) atop stone walls. The sight of the white-walled building reflected in the tranquil water is the most iconic landscape of this location.
In the early Edo period, this site was developed as a lodging for the Shogun and later became the seat of the Minakuchi Domain, which ruled 25,000 koku. Following the Meiji Restoration, much of the original structure was lost; the corner turret was sold to a merchant, and parts of the stone walls were repurposed as paving stones for the Ohmi Railway. However, in 1972, the site's historical value as a Shogunal lodging was officially recognized, and it was designated as a historical site of Shiga Prefecture. It is now carefully preserved as a local symbol.
The museum displays a variety of precious historical documents and artifacts related to Minakuchi Castle. A particularly notable exhibit is the 'Minakuchi Rapier,' introduced in April 2023. This is a model of a cross-shaped Western sword associated with Kato Yoshiaki (one of the Seven Spears of Shizugatake), the founder of the Minakuchi domain, and is held by Toei Shrine. The reconstructed corner turret and the moat fed by natural springs provide a vivid visual sense of what the castle once looked like.
Minakuchi Castle Ruins offers different charms depending on the season. Spring is especially popular, as the surrounding cherry blossoms reach full bloom, decorating the waterfront with vibrant colors. The sight of cherry blossoms reflected in the water is a quintessential Japanese spring scene. For the best experience, we recommend visiting during the daytime between 10:00 and 17:00, when the contrast between the white walls of the turret and the blue sky is most striking.
Visitors can learn about Edo-period castle culture through historical relics and models. The 'Minakuchi Rapier' exhibit offers a fascinating way to understand the history and culture of the samurai class. The museum's layout is designed to provide a deep understanding of the role of the Minakuchi domain and the function of the Shogun's lodging.
The area surrounding Minakuchi Castle Ruins retains a charming, historical atmosphere. Being close to the station, you can enjoy a stroll through the historic streets of Koka City. The site is also surrounded by lush nature, allowing for a peaceful and relaxing time by the water.