Akashi Castle

Akashi Castle, also historically known as Kiharu or Kinkō Castle, is a flatland-style Japanese fortress located on Mount Akamatsu in the city of Akashi, Hyōgo Prefecture. Constructed between 1617 and 1619 under the orders of Shogun Tokugawa Hidetada, the structure was built by Ogasawara Tadazane, the newly appointed daimyō of the Akashi Domain. The castle's strategic placement was critical during the Edo period, as it dominated the San'yōdō highway and overlooked the narrow straits leading to Awaji Island. Serving as a vital backup to the nearby Himeji Castle, it functioned as the final line of defense for the Kansai region against any potential attacks originating from western Japan.

The site holds significant historical intrigue, particularly regarding the legendary swordsman Miyamoto Musashi. While lacking definitive documentary proof, local tradition claims that Musashi served as a construction supervisor for the project while in the service of Ogasawara Tadazane. The fortress was completed in just one year, an unusually fast pace driven by the shogunate's 1615 decree limiting each clan to a single castle. Before its construction, the location was reputed to be the burial site of Kakinomoto no Hitomaro, a celebrated poet from the Nara period, adding a layer of cultural depth to its military origins.

Today, the original main structures no longer stand, having been demolished in 1874 following the Meiji Restoration. However, the grounds remain protected as a National Historic Site of Japan, a designation granted in 1957. Visitors can still view two surviving yagura towers, the Tatsumi and Hitsujisaru, along with a connecting wall, which have been designated as Important Cultural Properties. These remaining elements offer a glimpse into the architectural style of the early Edo period, preserving the legacy of a fortress that once guarded the approach to Japan's imperial capital.