Hakumai Castle

Azaka Castle, often referred to in part as Hakumai Castle, is a historic yamashiro-style mountain fortress located in the Oazaka neighborhood of Matsusaka, Mie Prefecture, Japan. Situated within the Ise-Shima National Park on a 312-meter peak overlooking Ise Bay, the site was originally constructed around 1335 by the prominent warlord Kitabatake Chikafusa. The complex is technically a misnomer as it comprises two distinct fortifications separated by 250 meters: the northern Shiinogi Castle and the southern Hakumai-jō. Built primarily with earthworks and dry moats rather than stone, the architecture reflects the strategic military needs of the Nanboku-cho period, featuring complicated enclosure systems designed to defend against rival clans supporting the Northern Court.

The castle holds significant historical importance as a primary citadel for the Kitabatake clan, who controlled northern Ise Province while supporting the Southern Imperial Court. In 1415, the fortress served as a critical rallying point where Kitabatake Mitsumasa successfully withstood a major siege by forces of the Ashikaga shogunate. The site remained in use through the Sengoku period until it was demolished in 1567. Today, the extensive ruins, which include trapezoidal enclosures and vertical moats, are designated as a National Historic Site of Japan, a status granted in 1982 that collectively recognizes Azaka, Taka, and Karatachi Castles.

Currently accessible to the public, the castle exists only as ruins but offers visitors a glimpse into medieval Japanese military engineering. The Hakumai portion sits at a higher elevation than its counterpart, providing commanding views of the surrounding city and distant mountains. Although the wooden structures have long since vanished, the well-preserved earthworks and layout allow historians and tourists to trace the defensive perimeter of this once-vital stronghold. Its preservation ensures the legacy of the Kitabatake clan's resistance and their pivotal role in the regional conflicts of the fourteenth and fifteenth centuries remains visible within the modern landscape.