Reconstructed Castle
○ Second 100 Castles

Kiyosu Castle

Oda Nobunaga's primary base before Nagoya Castle, Kiyosu was once called the 'gateway to the realm.' A striking red-walled reconstructed keep now stands as a symbol of the city; the famous Kiyosu Conference after Nobunaga's death was held nearby.

Japanese Name清洲城
PrefectureAichi Prefecture (愛知県)
RegionChubu (中部)
Castle TypeFlatland Castle
Year Built15th c.
Designation続100名城
Coordinates35.2, 136.8667

Kiyosu Castle earned its reputation as the "gateway to the realm" during its prominence as Oda Nobunaga's primary administrative and military base before his move to Nagoya Castle. This flatland fortress in Aichi Prefecture played a central role during Japan's critical period of reunification and remains recognized as a significant historical site among Japan's castles.

The castle's strategic importance extended beyond its physical fortifications to its role as a nexus of political power and decision-making during the tumultuous Sengoku period. Following Nobunaga's death in 1582, the castle became the site of the famous Kiyosu Conference, a crucial meeting where Nobunaga's successors negotiated the distribution of power and territories that would shape Japan's subsequent political development.

The striking reconstructed keep with its distinctive red walls stands as a modern symbol of the city's historical heritage while conveying the visual presence and authority that such castles projected across the landscape. The reconstruction faithfully represents the architectural style and grandeur associated with Nobunaga's castle, creating a tangible connection to the sixteenth-century power center.

Today the castle functions as a museum and cultural landmark accessible to visitors exploring this crucial period of Japanese history. The castle site and nearby historical landmarks commemorate the important events and figures that shaped the Kiyosu region's significance during Japan's transformation from fragmented feudal domains into a unified nation state.

Kiyosu Castle is recognized as one of Japan's second 100 castles as designated by the Japan Castle Foundation, a distinction that highlights its historical and architectural importance among the hundreds of castle sites across the country. As a flatland castle, its design reflects the defensive priorities and construction techniques of its era, with origins dating to 15th c.. Visitors traveling to Aichi Prefecture can explore the site alongside other regional historical attractions, and the location is well served by public transportation from major nearby cities.