Guida
Nagashino Castle is a designated national historic site located in Shinshiro City, Aichi Prefecture. This location played an extremely important role in the history of the Sengoku (Warring States) period, most notably as the stage for the 'Battle of Nagashino' in 1575. Today, the castle ruins are well-preserved, allowing visitors to witness up close the defensive structures that utilized the natural terrain, such as massive earthen walls (dorui) and moats. It is a site of immense historical value for understanding Japanese military architecture.
The history of Nagashino Castle began in 1508 when it was constructed by Suganuma Motonari. The area served as a vital transport hub connecting the Higashi-Mikawa and Nagano regions with Shizuoka and Gifu prefectures via land and water. Throughout history, the control of this land shifted between powerful clans, including the Imagawa, the Matsudaira (later the Tokugawa), and the Takeda clans. The Battle of Nagashino in 1575, a fierce clash between the Takeda army and the Oda-Tokugawa alliance, was a turning point that significantly influenced the subsequent course of Japanese history. Following the battle, the castle's defensive capabilities were further enhanced, and today, the site is preserved as a significant archaeological monument.
The greatest attraction of Nagashino Castle is the remains of its castle structure, which skillfully utilized the natural topography. The designated historical site spans approximately 35,500 square meters around the Honmaru (inner sanctum) area. Visitors can still see large earthen embankments and massive moat traces. Notable features include the 'Yari-yasuri' (notched) earthen walls in the northeastern part of the main enclosure designed for defensive flanking, the depressions of the Noyu-kuruwa (watchtower site), and ancient wells, all of which demonstrate advanced fortification techniques of the era. Another unique sight is the way the Iida Line railway tracks are laid directly atop the historical earthen embankments, representing a striking fusion of history and modern infrastructure.
The Nagashino Castle ruins offer an open, refreshing space surrounded by nature. During daylight hours, the shapes of the well-maintained earthen walls and moats are clearly visible, making it an ideal time to observe the historical structures. The surrounding area is filled with lush greenery, allowing you to enjoy the tranquil atmosphere of the ruins alongside the changing seasonal scenery. For the best experience of the landscape and structural details, a daytime visit is highly recommended.
Walking through the vast grounds of the Nagashino Castle ruins allows you to trace the very terrain where legendary battles once took place. By standing beside the massive earthen walls and moats, you can truly feel the defensive technology of the Sengoku period. Furthermore, the surrounding area is dotted with various historical sites related to the Battle of Nagashino, making it a rewarding experience to explore the broader area to deepen your historical understanding.
There are many historical facilities and sites near Nagashino Castle. The 'Nagashino Castle Site Historical Preservation Museum' is a central hub for the research and preservation of materials related to the Battle of Nagashino; through its exhibits, you can learn about the battle and the castle's structure in detail. Other nearby spots, such as 'Ioko-ji' temple (related to the Takeda clan's encampment) and the monument of Torii Saemon, allow visitors to grasp the full scale of the historical conflicts that shaped this region.
Since the site consists of vast natural terrain including earthen walls and unpaved paths, we highly recommend wearing comfortable walking shoes. While the ruins are an open-air space, please respect the environment and enjoy your stroll quietly.