Japanese Castles: The Real Ones and Why They Matter

Japan built over 5,000 castles during the Sengoku period (1467–1615) — the 150 years of civil war during which regional lords competed for territory and survival. Most were destroyed, abandoned, or dismantled during the Meiji period (1868–1912), when the new government systematically eliminated the feudal infrastructure. Some were bombed in World War II. A handful survived.

Of the castles visible in Japan today, only 12 have original keeps (tenshukaku) from the feudal period — structures that have not been reconstructed from concrete after the fact. These are the ones listed in this guide. The concrete reconstructions (Nagoya, Osaka, Hiroshima, Tokyo) are historically interesting and worth visiting for their museums; architecturally they are reproductions. The real thing is a different experience.

The 12 Original Keeps

Himeji Castle — the Finest

Himeji, Hyogo Prefecture (Shinkansen from Osaka: 30 min; from Tokyo: 2.5 hours)

The undisputed benchmark — the largest, most architecturally elaborate, and best-preserved castle in Japan. The main keep (1609, designated National Treasure) stands 46 meters on its stone foundation, surrounded by three smaller towers and a complex of multiple defensive compounds, gates, and corridors. The white plaster exterior gives it the name “White Heron Castle” (Shirasagi-jo).

The defensive logic is visible throughout: the castle is engineered to confuse and slow attackers — the winding path from the outer gate to the main keep turns 14 times, crossing seven gates in apparently random sequence (the sequence is not random; each turn exposes attackers to flanking fire from the next gate’s defenders). The interior floors are designed for defenders to drop stones and boiling water through trap doors onto anyone who breached the lower floors.

Admission ¥1,000. Allow 2 hours minimum. The approach from Himeji Station along the main boulevard (Otemae-dori) provides the classic frontal view; the cherry blossom season version is exceptional.

Matsumoto Castle — the Black One

Matsumoto, Nagano Prefecture (train from Nagoya: 2 hours; from Tokyo: 2.5 hours)

The most striking of the original castles visually: black lacquer exterior (karasu-jo, “crow castle”), reflected in the surrounding water moat, against the backdrop of the Japanese Alps. The main keep dates to 1597, making it the oldest original five-story castle tower in Japan.

The interior shows the castle’s military evolution: the outer keep (added 1635) is a lighter moon-viewing pavilion that was added when the immediate military threat had receded — a castle converted to peacetime cultural use within its own lifetime. The gun ports in the first floor walls are the right size for the muskets in use at the time of construction; the arrow slits above them are for a bow technology that had already been superseded.

Admission ¥700. The city of Matsumoto itself rewards a day — the Nakamachi traditional merchant district, the frog-icon covered city streets, the sake breweries.

Hikone Castle

Hikone, Shiga Prefecture (30 min by train from Kyoto on JR Biwako Line)

One of four National Treasure castles. The keep dates to 1606, built largely with materials from demolished castles in the surrounding region after the decisive battle of Sekigahara (1600). The castle overlooks Lake Biwa, Japan’s largest lake; the garden below (Genkyuen, 1677) is designed to incorporate the lake as borrowed scenery.

More intimate in scale than Himeji or Matsumoto. The wooden interior staircases are extremely steep — originals, not modern reproductions, designed to be difficult to ascend in armor under combat conditions.

Hikonyan: The castle’s official mascot — a round white cat in samurai helmet — has become one of Japan’s most popular mascot characters and appears on everything in Hikone. The live Hikonyan performances outside the castle gates are a distinctly Japanese phenomenon.

Admission ¥1,200.

Inuyama Castle

Inuyama, Aichi Prefecture (30 min by Meitetsu train from Nagoya)

The oldest surviving castle keep in Japan, dated to 1537. Smaller than the others; a compact three-story tower on a rock cliff above the Kiso River. The view from the top-floor balcony looking upstream at the river gorge is one of the better castle views available.

Inuyama was the only privately owned castle in Japan for most of the postwar period (owned by the Naruse family who had served the Owari Tokugawa domain); it transferred to local government ownership in 2004. Admission ¥550.

Kochi Castle

Kochi City, Kochi Prefecture, Shikoku (1 hour from Matsuyama by road)

The only surviving castle in Japan where the complete set of buildings — main keep, secondary keep, and palace (the goten, where the lord lived and conducted business) — all survived together. The interior of the palace shows feudal residential architecture that most castles lack: tatami rooms, decorative alcoves, built-in shelving, and the organizational hierarchy visible in the room sizes.

The main keep dates to 1748 (rebuilt after fire; original 1601). The tosa-style fighter sculptures on the roof corners are specific to Kochi and differ from other castle decoration.

Admission ¥420.

Marugame Castle

Marugame, Kagawa Prefecture, Shikoku (30 min by train from Takamatsu)

Notable primarily for its stone foundation walls: three successive layers of different construction periods (1597, 1612, 1641), each visible as a distinct course and style. The “fan-shaped” geometry of the base walls was engineered to resist both artillery and the earthquake-prone Inland Sea geology. The main keep (1660) is small but original.

The walls themselves — before you even reach the keep — are the reason most castle specialists list Marugame as essential.

Free access to the castle grounds; ¥200 to enter the main keep.

Bitchu Matsuyama Castle

Takahashi, Okayama Prefecture (90 min from Okayama Station by train + bus + walk)

Japan’s highest-altitude surviving castle keep, at 480 meters elevation on a mountain summit. The approach involves a 20-minute walk up the mountain from the bus stop (or a taxi in season). The view from the summit, with the valley below in morning mist, is the reason to go.

The castle is rarely crowded — the remoteness deters casual visitors. Admission ¥500.

The Other Six (Original Keeps)

Maruoka Castle (Fukui Prefecture) — the oldest surviving castle tower by some chronologies (1576); small, simple, showing the pre-Sengoku fortress style.

Matsuyama Castle (Ehime Prefecture, Shikoku) — the largest original castle complex in the Chugoku-Shikoku region; accessible by ropeway to the summit. Combined with Dogo Onsen as a Matsuyama day.

Uwajima Castle (Ehime Prefecture) — small, original 1665 keep, surrounded by a modern town; the view out over the fishing harbor.

Ozu Castle (Ehime Prefecture) — reconstructed in 2004 from original plans; technically a modern reconstruction but from period materials and techniques.

備中高松城 (Bitchu Takamatsu) — now only earthworks.

Yodo Castle, Iwamura Castle — ruins only.

The Important Reconstructions

Several reconstructed castles are worth visiting for their museums and settings even though the architecture is concrete:

Osaka Castle: The museum inside the 1931/1997 concrete reconstruction covers Toyotomi Hideyoshi’s career in detail — some of the best castle history interpretation in Japan. The park is excellent for cherry blossom.

Kumamoto Castle: The original keep (1607, one of Japan’s finest) was severely damaged in the 2016 earthquake; reconstruction is ongoing. The castle grounds are partially open and the visible reconstruction work is itself interesting.

Nagoya Castle: The concrete reconstruction of the main tower is open; the adjacent Hommaru Palace (authentically restored, see Nagoya guide) is the architectural highlight.

Understanding Castle Architecture

Tenshu (main keep): The dominant tower, used for military observation and as a last defensive position. Most castle keeps were not the lord’s residence — that was the separate goten (palace) complex within the castle grounds.

Stone foundations (ishigaki): Japanese castles sit on elaborate stone walls assembled from irregular stones without mortar (nozurazumi) or from shaped stones (nengozumi). The engineering is sophisticated — the foundations distribute stress vertically and laterally, resist earthquake motion, and in some cases are designed to look more impressive at a distance than they structurally need to be.

Defensive design: Loopholes (gun ports and arrow slits) at multiple levels; water moats; multiple gates in labyrinthine sequence; watch towers (yagura) at corners; daimyo residences within the inner compound. The complete defensive system of a major castle covered many hectares.

The Shachihoko: The fish-tiger (shachihoko) figures on castle roofs are associated with water — mythological protection against fire, the greatest threat to wooden fortifications. Gold shachihoko (Nagoya) were statements of wealth; the gilded copper ones at Himeji and Matsumoto are more subtle.

The authentic castles are rare and worth seeking out specifically. Standing on the original wooden floors at Matsumoto at 8am before the crowds arrive, looking out through the gun ports at the moat and the Alps, the 400-year gap closes more than it does in any reconstruction. That is why the distinction matters.