Ueda Castle

Ueda Castle is a historic hilltop-style Japanese castle located in the city of Ueda within Nagano Prefecture, Japan. Originally constructed in 1583 under the orders of Tokugawa Ieyasu, the fortress was established by the renowned warlord Sanada Masayuki, who moved his main base there to secure the region. The site strategically overlooks a branch of the Chikuma River, which naturally served as a southern moat, while the complex itself featured extensive artificial moats, stone ramparts, and earthen defenses. Unlike many castles of its era, Ueda Castle notably lacked a central keep, or tenshu, relying instead on seven two-story watchtowers and a multi-bailey layout comprising the Central, Second, and Third Baileys for protection and administration.

The castle holds significant historical importance due to its association with the Sanada clan during the turbulent Sengoku period. Despite being vastly outnumbered, Sanada Masayuki famously defeated Tokugawa Ieyasu's forces at the nearby Battle of Kami River shortly after the castle's completion, a victory that cemented his legendary status. Later, during the Edo period, the site served as the residence for a cadet branch of the Matsudaira clan, who governed the Ueda Domain. The structure witnessed centuries of political shifts before being largely demolished in 1874 following the Meiji Restoration.

Today, Ueda Castle is designated as a National Historic Site of Japan, a status granted in 1934 to preserve its cultural legacy. While the original main residence and many towers are gone, with parts of the former Third Bailey now occupied by Ueda High School, several buildings have been reconstructed or remain extant. The grounds are open to the public, offering visitors a glimpse into its layered past through remaining foundation bases, gardens, and restored gates. Also known historically as Amagafuji-jo or Matsuo-jo, the site stands as a enduring monument to the strategic ingenuity of the Sanada clan.