Inuyama Castle National Treasure (Japan's Oldest Original Wooden Keep)

Category: Historic Castle & National Treasure | Location: Aichi

Perched commandingly atop a 40-meter rocky bluff overlooking the emerald currents of the Kiso River in northern Aichi Prefecture, Inuyama Castle (Inuyama-jo) is an exceptional architectural treasure of feudal Japan. Holding the supreme distinction of being one of only five castles in the entire nation designated a National Treasure (*Kokuhou*)—alongside Himeji, Matsumoto, Hikone, and Matsue—its primary keep (*Tenshukaku*) was originally constructed in 1537 by Oda Nobuyasu, uncle of the legendary warlord Oda Nobunaga. It is widely revered by architectural historians as the oldest surviving original wooden castle keep in all of Japan. The interior of Inuyama Castle provides an uncompromisingly authentic encounter with the Sengoku (Warring States) period. Entering the keep—featuring three external tiers housing four interior stories and two stone basement vaults—visitors tread across ancient polished floorboards that creak beneath foot, ascending perilous wooden staircases pitched at dizzying 50-degree inclines. The defensive woodwork incorporates secret samurai hideaways (*musha-kakushi*), stone-dropping chutes (*ishi-otoshi*), and intimate exhibits of antique armor, matchlock rifles, and ancestral documents preserved by the Naruse samurai clan, who privately owned the castle until 2004. The crowning glory of an Inuyama pilgrimage is stepping out onto the top-floor exterior wooden veranda gallery (*Mawari-en*). Unencumbered by modern safety glass and enclosed only by a low historic wooden railing, visitors are embraced by rushing river breezes and a sublime 360-degree panorama: the serpentine Kiso River (affectionately dubbed the \'Rhine of Japan\'), the sprawling fertile Nobi Plain, the distant peak of Mount Kinka crowned by Gifu Castle, and Mount Ontake gleaming on the northern alpine horizon. Poetically nicknamed \'Hakutei-jo\' (White Emperor Castle) by the Edo scholar Ogyu Sorai after a classic verse by Tang Dynasty poet Li Bai, Inuyama Castle is an unmissable monument of living samurai history.