Kumamoto Castle

Thirteen Buildings That Outlived the Castle

Kumamoto Castle (熊本城, Kumamoto-jō) is an early-modern fortress in Chuo Ward, Kumamoto City, of which thirteen surviving Edo-period structures were designated Important Cultural Properties on 23 January 1933, under a single designation numbered 00915 and owned by the national government.

Visitors arrive expecting the great black keep on the skyline. That building is a 1960 reconstruction in reinforced concrete, faithful outside and modern within, and it holds no cultural property status. The designated buildings are the ones most people walk past: a run of low turrets along the eastern ramparts, a gate at the unlucky corner, a wall that goes on for a quarter of a kilometre, and one enormous tower on the northwest shoulder of the citadel that is a keep in everything but name.

Kato Kiyomasa broke ground in 1601 and the castle was finished in 1607. He was a general with an unusual reputation for engineering, and the stonework here made his name: the curved batter that starts almost walkable at the base and steepens to vertical near the top, a profile the local guides call musha-gaeshi, the warrior repeller.

Two Generations of Timber

The thirteen buildings fall into two clear groups separated by two and a half centuries, and reading a castle map with those dates in hand changes what you see.

Five of them go back to Kiyomasa's construction between 1601 and 1607. Uto Turret is the largest. Genoshin Turret has a plan that bends around a corner of the enceinte. Higashi-Jūhachiken Turret, Kita-Jūhachiken Turret and Goken Turret stand on the northern and eastern edge of the main citadel, the last two also following the angles of the stone base beneath them. The Long Wall along the Tsuboi River dates from the same campaign.

The rest are late Edo work, rebuilt on the old bases as the domain kept the fortress serviceable: Jūyonken Turret in 1844, Shichiken Turret in 1857, Hira Turret and Kenmotsu Turret in 1860, Tago Turret in 1865, and Shiken Turret and the Akazu Gate in 1866. The gate takes its name, "the gate that does not open," from the practice of keeping it shut: it stands at the northeast, the direction from which misfortune was thought to enter, and was used only for specific passages such as funerals.

Roof coverings distinguish the two families of building at a glance. The turrets and the gate carry hongawara, the heavy alternation of broad pan tiles and semicylindrical cover tiles used on formal architecture. The Long Wall is roofed in sangawara, the lighter interlocking S-profile tile that came into wide use later. The wall runs 252.7 metres by the Agency for Cultural Affairs measurement, and Kumamoto City's own recovery documents give 242.44 metres, so figures in circulation vary.

Uto Turret, the Keep That Is Not Called One

Uto Turret stands at the northwest corner of Hirazaemon-maru with three roofs, five upper floors and a basement, plus a single-storey annexe running south. Those are keep dimensions. Kumamoto people call it the third keep, after the great and small keeps, and it was the only multi-roofed turret at the castle to survive from the founding period into modern times.

An old account, repeated in the Agency's own description, holds that the building was moved here from Uto Castle, the seat of Konishi Yukinaga, and preserves the form of a keep of the early Momoyama period. Specialists have questioned the relocation story for decades, and the safest statement is the one the sources support: the building shows early Momoyama keep design, and it is said to have come from Uto.

The turret was damaged in the 2016 earthquakes, which brought down its annexe, and it has since been taken apart piece by piece for repair. Dismantling of the five-storey block finished in 2025 and excavation of the basement chamber followed; layers of fill containing roof tiles, one inscribed with a date corresponding to 1599, were found beneath it and are read as traces of stone wall repairs carried out under the Hosokawa lords. Design work runs through the later 2020s, reassembly is scheduled to begin in fiscal 2028, and completion is planned for fiscal 2032. Until then the turret is inside a temporary shelter.

Fire, Then Two Earthquakes

The castle lost its centre in 1877. Three days before Saigo Takamori's army reached the walls in the Satsuma Rebellion, fire destroyed the great and small keeps and the palace of the main citadel; the garrison under Tani Tateki then held out for fifty-odd days. The buildings that came through the fire are largely the ones that carry the 1933 designation, which is why the eastern ramparts hold the densest surviving group.

The Kumamoto earthquakes of April 2016 damaged all thirteen. Kita-Jūhachiken Turret and Higashi-Jūhachiken Turret collapsed outright, part of one of them falling through the roof of a shrine building next door. The annexe of Uto Turret came down, the Akazu Gate partly collapsed with the stonework around it, and about 80 metres of the Long Wall went over. Repair has proceeded building by building: the Long Wall was completed in 2021, the same year as the keep, and Kenmotsu Turret in 2023.

A second earthquake struck on 28 July 2026, registering the highest intensity in Uki City and Hikawa Town and strong shaking in central Kumamoto. The city recorded damage at around forty points in the stone walls and at eight buildings, Kenmotsu Turret among them, along with damage to interior finishes in the reconstructed keep. Areas that had been repaired after 2016 were among those affected. The castle closed to visitors the same day and the full recovery timetable, previously set at fiscal 2052, is under review.

Planning a Visit

Kumamoto Castle is temporarily closed as of August 2026 while safety inspections continue after the July earthquake. Some facilities around the site have resumed, including the Ninomaru rest house and the shops and restaurants of Sakura-no-baba Josaien, while the Wakuwakuza museum remains shut. Anyone travelling to Kumamoto should check the official castle website for the current position before setting out; the situation has been changing week by week.

In normal operation the grounds open from 9:00 to 17:00 with last entry at 16:00, closing only on 29 December, and admission is 800 yen for high school students and above and 300 yen for elementary and junior high school students. The route since 2021 has run along a special elevated walkway roughly six metres above the ground, built so that visitors can pass over active repair sites and look down into them. Photography is permitted throughout, and lifts serve the walkway.

The designated buildings are best understood from outside. Uto Turret is hidden by its work shelter but its scale still registers from Ninomaru Square, where the shelter walls carry a projected image of the turret as it stood before 2016. The eastern turret group is visible from the walkway. Kenmotsu Turret sits apart from the main circuit at the northern edge of the Ninomaru area, and the Long Wall can be seen from the Tsuboi River path outside the paying area at any time.

The nearest access is the Kumamotojo-mae tram stop on the Kumamoto City Tram, about fifteen minutes from Kumamoto Station, followed by a short walk.