Historic Ruins
○ Second 100 Castles

Yatsushiro Castle

A flatland castle in Yatsushiro, Kumamoto, built in 1622 on a low mound above the sea by Kato Tadahiro. The moated stone walls and the unusual floating appearance over the rice fields have earned it the nickname 'Floating Castle' (浮城). Only the stone bases remain after Meiji-era demolition.

Yatsushiro Castle
Photo: 見学者 / Emeraldgreen at Japanese Wikipedia / CC BY-SA 3.0 — via Wikimedia Commons
Japanese Name八代城
PrefectureKumamoto Prefecture (熊本県)
RegionKyushu (九州)
Castle TypeFlatland Castle
Year Built1622
Designation続100名城
Coordinates32.5167, 130.5833

Yatsushiro Castle represents a distinctive type of Japanese castle constructed on flatland terrain rather than on hilltops, built in 1622 by Kato Tadahiro. Its location on a low mound above the surrounding landscape created the impression that the castle floated above the rice fields, earning it the poetic nickname of Floating Castle. This architectural approach was less common than hill castles but reflected both the regional geography and specific defensive strategies suitable to the Yatsushiro area.

The castle's design incorporated moated stone walls that took advantage of the flat terrain and proximity to water to create defensive barriers. The construction methods reflected the relatively advanced state of military engineering in the early Edo period, when fortress design had become highly sophisticated. The integration of water features into the defensive system demonstrated how builders adapted classical castle principles to different geographical settings.

Like many Japanese castles, Yatsushiro Castle underwent demolition during the Meiji period as part of Japan's modernization efforts. However, the stone bases that supported the original structures remain in place, preserving the footprint of the castle complex. These foundations provide archaeologists and historians with valuable information about the original layout and construction methods. The site offers visitors a chance to visualize how the castle would have appeared in its original setting among the agricultural landscape.

The castle grounds remain accessible to visitors interested in exploring the remaining stonework and understanding the castle's unique relationship with its environment. As a Continued Selection One Hundred Castle site, it receives recognition for its historical significance. The combination of well-preserved stone bases and the distinctive flatland location makes it an important example of regional variation in Japanese castle architecture.

Yatsushiro 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 1622. Visitors traveling to Kumamoto Prefecture can explore the site alongside other regional historical attractions.

On the Ground

AddressTsukizoemachi, Yatsushiro, Kumamoto Prefecture, 866-0885, Japan
Car parking18 car parks within 1.5 km — nearest about 607 m away
Public toiletsNone recorded within 1.5 km

Car parks and toilets are counted from OpenStreetMap within 1.5 km of the castle coordinates, as recorded on 2026-08-15. They are not necessarily run by the castle, and OpenStreetMap does not record every facility — “none recorded” does not mean there are none.

Castle Hopping from Here

CastleDistance
Uto Castle 19.6 km

Distances are straight-line between castle coordinates, not travel distance. Only castles within 30 km are listed.

Is It Original?

Original keep still standing?No — this castle is not among the twelve in Japan whose keep survives from the pre-modern period. Any tower here is a later reconstruction or the site is a ruin.
Classification on this siteHistoric Ruins
Nationally designated properties recorded here1
Recorded property names (Japanese)

The count of twelve surviving keeps is stated independently by the official sites of Matsue, Maruoka, Matsuyama and Bitchu Matsuyama (checked 2026-09-04). Each of the twelve carries its own source on its own page. The classification line below it is this site's own grouping, not an official designation. The designated properties below it come from the Agency for Cultural Affairs national database of designated cultural properties (国指定文化財等データベース), retrieved 2026-08-13. Official record. A missing line means no entry was found in that database — not that the property is undesignated.

Location

View larger map — © OpenStreetMap contributors

Sources and What a Blank Means

Data on this page comes from OpenStreetMap, Wikimedia Commons and the Agency for Cultural Affairs national database of designated cultural properties. Checked 2026-08-22.

A blank or missing line means we found no record in those sources — not that the castle lacks the thing. Admission fees, opening hours and access change without notice; please confirm with the official site before travelling.