Sunpu Castle

Sunpu Castle, also known as Fuchu Castle or Shizuoka Castle, is a historic hirayama-style Japanese fortress located in Aoi-ku, Shizuoka City, within Shizuoka Prefecture. Originally constructed in 1589 by the renowned warlord Tokugawa Ieyasu on the site of a former Imagawa clan residence, the structure underwent significant reconstructions in 1607, 1610, and 1635. The castle earned the poetic sobriquet "Castle of the Floating Isle" and served as a critical military and political installation from the Sengoku period until 1889. Its architectural evolution included the addition of a triple moat system and a massive seven-story donjon, features built through the mandated labor of regional daimyos under Tokugawa policy.

The site holds profound historical significance as the retirement headquarters of Tokugawa Ieyasu after he abdicated the title of shogun to his son. From Sunpu, Ieyasu maintained effective rule over Japan through a shadow government, orchestrating national affairs from behind the scenes. The castle also hosted pivotal international diplomacy, notably welcoming John Saris and William Adams in 1613 during the first English trade mission to negotiate terms for the East India Company. Following centuries of service, the main structures were demolished in 1896, leaving the site in a ruined state.

Today, Sunpu Castle exists primarily as ruins but remains open to the public as a historical park. While the original keep and palace are gone, several key structures have been faithfully reconstructed to preserve the legacy of the fortress. Visitors can view the rebuilt Tatsumi yagura turret and the restored East Gate, which offer glimpses into the castle's former grandeur. These reconstructions stand alongside aerial views of the expansive grounds, allowing modern audiences to appreciate the strategic layout and cultural importance of this once-dominant feudal stronghold.