Inuyama Castle

Inuyama Castle is a historic hirayama-style fortress situated on a hill overlooking the Kiso River in Inuyama, Aichi Prefecture, Japan. Originally constructed in 1537 by Oda Hirochika, the complex served as a strategic border defense between Aichi and Gifu Prefectures. While the broader castle grounds date to the mid-sixteenth century, the main keep, or tenshu, was largely shaped during the late 1500s under Oda Nobukatsu, the son of the famous warlord Oda Nobunaga. The site required the relocation of the ancient Haritsuna Shrine to accommodate its construction, highlighting its significant impact on the local landscape during the Muromachi period.

The castle holds immense architectural and historical value, possessing one of only twelve pre-modern tenshu remaining in existence. Scientific analysis of tree rings in the construction materials has confirmed that its keep dates to the 1580s, making it the oldest extant main tower in Japan. This distinction earned the structure designation as a National Treasure, a rare honor shared with only four other castles including Himeji and Matsumoto. Uniquely, Inuyama Castle is the only National Treasure keep that allows visitors to walk completely around its exterior cornice, offering unparalleled views of the surrounding river valley.

Today, Inuyama Castle stands as a well-preserved monument and a designated National Historic Site, a status officially recognized in 2018. Despite being small in scale compared to later fortresses, its complex design creates varying silhouettes depending on the viewing angle, showcasing the evolution of Japanese military architecture. The castle remains a popular cultural destination, maintaining its original form without modern concrete reconstruction, thereby providing an authentic glimpse into Japan's feudal past and the legacy of the Oda and Naruse clans who once occupied it.