Nagoya Castle Ninomaru Garden

Ninomaru Garden of Nagoya Castle: A Daimyo Stroll Garden of the Owari Tokugawa

Behind the great keep of Nagoya Castle, on a slope measuring 30,463 square meters, lies a garden that once served the most powerful branch of the Tokugawa house outside Edo. Ninomaru Garden was laid out in 1615, the first year of the Genna era, when Tokugawa Yoshinao took up residence in the newly built Ninomaru Palace as first lord of Owari Domain. The palace is long gone, dismantled by the Meiji-era army that took the castle over. What remains are the bones of the garden: massive boulders of blue Kishū stone, a dry waterfall crossed by a stone bridge, and the contours of artificial hills that once concealed a forest deep enough to slow an invading army.

This is, by area, the largest surviving daimyo residence garden in Japan. It is also one of the very few castle-residence gardens to come down to us at all.

A Garden Born With the Castle

Construction of Nagoya Castle began in 1610 under Tokugawa Ieyasu, who intended it as the seat of his ninth son, Yoshinao. Some twenty western lords were assigned the labor, an arrangement known as tenka-bushin. By 1615 the Ninomaru Palace stood north of the main keep, and the garden on its northern flank was laid out at the same time.

Local tradition credits the design to Ueda Sōko (1563–1650), a samurai-turned-tea-master who had studied under Sen no Rikyū. Ueda served the Asano clan of Wakayama, which contributed to the Nagoya works, and his hand is suggested by stylistic affinities with the Nishinomaru Garden at Wakayama Castle, particularly the use of Kishū blue stone and a Gyokkan-school dry waterfall. The shogun's master builder Kobori Enshū was also involved in the castle's design, so the matter is not entirely settled, but Ueda is the name most often cited.

The earliest garden was reportedly modeled on Nezame-no-toko, a river gorge in Kiso then within Owari territory. Steep ridges and deep valleys were piled up from stones left over from the castle build, and the densely planted slopes are thought to have doubled as a defensive barrier against any force that might try to approach the main keep from the north.

Three Centuries of Rebuilding

The garden was never static. Around the Kyōhō era (1716–1736) it was reworked as a karesansui, a dry-landscape garden, with raked gravel replacing some of the original ponds. The most ambitious revision came under the tenth lord, Tokugawa Nariomu, during the Bunsei years (1818–1830). He extended the garden eastward to take in what is now the East Garden, added six teahouses among the slopes, and installed extensive water features fed by buried conduits.

A detailed picture survives from this golden age: the Oshiro Oniwa Ezu, a painted plan held by the Hōsa Bunko library in Nagoya. When the city's archaeology team began digging in the 1970s, the structures shown in the plan, including pavilion foundations, paving stones, and the abutments of bridges over the lost ponds, came up almost exactly where the painting placed them. The plan has since served as the master document for every restoration that has followed.

Designation, Loss, and Recovery

After the Meiji Restoration in 1868, Nagoya Castle passed to the Army Ministry. Barracks and a parade ground replaced much of the eastern garden; ponds were filled, and Gongen-yama, the central artificial hill, was cut down on its southern side. Only the northern garden, the Kita-on'niwa, survived more or less intact. The southern Front Garden was newly composed during this period from stones salvaged from the rest.

In March 1953, these two surviving sections were designated a Place of Scenic Beauty under national law: the first such designation given to any garden in Aichi Prefecture. Decades later, excavations confirmed that the foundations and stone settings of the lost Bunsei-era garden lay preserved beneath the post-Meiji ground level. In February 2018, the designation was extended to cover almost the whole of the original garden, including the East Garden reconstructed in 1978.

Reading the Stones

The Ninomaru garden has no central pond, an unusual feature for a daimyo garden of its scale, and rewards a slower kind of looking. The eye travels across stone, not water.

Its most studied composition is the Gyokkan-school dry waterfall in the northern garden. Named after the late Song-dynasty painter Yujian, this style raises a tall artificial hill behind the principal stones, drops an imagined cascade between them, and crosses the top of the fall with a stone bridge. Surviving examples in Japan can be counted on the fingers of both hands; the others include Kokawa-dera in Wakayama and Kan'yō-ji in Yamaguchi. The Nagoya version uses bold green-blue stones quarried from Kii Province, set in a composition the Agency for Cultural Affairs once described as "vigorous and varied." A second, smaller dry waterfall sits to the west, easily missed if you keep walking.

Elsewhere in the grounds, raised mounds, flagstone paths, and the foundations of vanished teahouses suggest the rhythm of a strolling lord pausing for tea. Restoration work, ongoing since 2013, has reset many of the displaced stones and removed overgrown vegetation that had blocked the long views; some areas may be fenced off depending on the schedule of the day.

Visiting Today

The garden lies inside the paid grounds of Nagoya Castle and is reached most easily from Nagoyajō Station on the Meijō subway line, a walk of about seven minutes. The single castle admission of 500 yen for adults covers the garden, the Honmaru Palace, and all other accessible areas; junior high school students and younger enter free. The main keep itself is currently closed in preparation for a planned timber reconstruction, so the garden, the restored Honmaru Palace, and the corner turrets are the principal attractions.

Mornings just after the 9:00 opening tend to be quiet. The Ninomaru area is set apart from the main visitor route to the keep, and most arrivals walk past it without slowing down. Late autumn brings deep color to the maples around the Ninomaru Chatei teahouse; early April adds blossoming cherry along the moat walls.

Nearby

Within the castle grounds, the Honmaru Palace was rebuilt over a decade and fully reopened in 2018; its restored painted partitions and gilded ceilings give a vivid sense of what a Tokugawa-era audience hall looked like in use. The Nishinomaru Okura Jōhōkan, opened more recently, displays original Important Cultural Property paintings rescued before the wartime fires. Outside the moat, the Tokugawa Art Museum and the adjoining Tokugawaen, itself a fine Meiji-era stroll garden, preserve much of the Owari Tokugawa heirloom collection, and can be reached in about twenty minutes by bus from the castle.