Guide
Gassan-Tomita Castle Ruins is one of the prestigious 'Japan 100 Famous Castles' located in Yasugi City, Shimane Prefecture. The main citadel (Honmaru) is situated near the summit of Mt. Gassan (Getsuho-mine) at an altitude of 191.5m, showcasing the classic structure of a Japanese mountain fortress. This site, which holds deep historical significance from the Azuchi-Momoyama period to the early Edo period, has been preserved as a historical park where you can explore castle ruins and learn about its profound historical background.
The history of this castle dates back to 1567 (Eiroku 10), when Amano Takashige served as the castle lord. In 1569, the castle withstood a fierce siege by the former retainers of the Amago clan. In 1570, the site saw further conflict when the main forces of the Mori clan arrived. During the Edo period, the castle was abandoned in 1611 (Keicho 16) when Horio Takaharu moved to Matsue Castle. In the modern era, efforts have been made to preserve the site, including tree clearing and stone wall repairs, to maintain its status as a historical park. It was officially selected as the 65th site in the 'Japan 100 Famous Castles' list in 2006.
The castle's structure is uniquely shaped by the topography of Mt. Gassan, which resembles a shoe. The main citadel at the summit is surrounded by steep slopes on the north, east, and south sides, making it a highly defensible position. There are three main access routes: Sugaya-guchi at the northern foot, the main entrance via Tomida Bridge, and Shiya-guchi at the southern foot. These paths lead to the summit's 'Tsume-no-Shiro' through winding paths known as 'Nanamagari' (seven bends). Visitors can also observe various 'Kuruwa' (enclosures) that once formed part of the sophisticated defense system.
The castle ruins are open to the public at all times, allowing for visits regardless of the season. However, as the site involves hiking, please prepare for changes in weather and temperature. If you plan to visit the Yasugi City Historical Museum, please ensure you arrive during their operating hours (9:30 AM – 5:00 PM). Note that the museum is closed every Tuesday (or the following day if Tuesday is a public holiday).
Various programs and courses are available to deepen your understanding of the history. For instance, you can take a guided hiking course to walk through the ruins while receiving historical explanations. Another way to experience the area is by exploring the traditional streets of Hirose, a former castle town, or by studying the exhibits at the historical museum. At the museum, you can also collect the official '100 Famous Castles' stamp.
The foot of the castle is surrounded by historical streetscapes. The Yasugi City Historical Museum serves as a key base for accessing the castle ruins. The nearby 'Hirose' area retains the atmosphere of an old castle town, offering opportunities to encounter traditional Japanese crafts and culture.
Because this is a mountain castle, the terrain can be steep and uneven despite the maintenance. Sturdy hiking shoes and practical outdoor clothing are essential. Please check the museum's operating hours and closing days in advance. To protect these precious historical remains, please follow all local rules and maintain proper etiquette while exploring.