Morizui Family Residence (Former Yamada Family Residence)

Shujo Family Residence (Former Yamada Family Residence) Stone-Built Embankment

Tucked away along the inner shore of Ise Bay in Tokai City, Aichi Prefecture, a long, weathered stone wall quietly traces the boundary of a private property just northwest of Jurakuen Park. To the casual passer-by it might look like an old garden retaining wall, but to specialists in Japan's industrial and civil engineering heritage it is something far more significant: the Shujo Family Residence (Former Yamada Family Residence) Stone-Built Embankment, a 76-meter Taishō-era seawall constructed using the celebrated "artificial stone method" (jinzōseki kōhō) devised by the Aichi-born civil engineer Hattori Chōshichi.

In March 2024 this modest yet remarkable structure was registered as a National Tangible Cultural Property of Japan, becoming part of the very first group of nationally registered cultural property buildings in Tokai City. For visitors fascinated by the lesser-known but transformative civil engineering achievements of modernizing Japan, this stone embankment offers a rare and tangible window onto the technology that built the country's modern ports, canals, and reclaimed coastlines.

What Is This Embankment, Exactly?

The structure is a stone-built protective embankment surrounding what was once a small piece of land reclaimed from the sea on the Ise Bay coast. The official record describes it as "stone construction, total length 76 meters, with attached seawall (bōchōtei)," counted as a single unit. The wall wraps around the northwest, north, and south sides of the property, defining the edge of the reclaimed parcel against the historic shoreline.

What makes the embankment visually distinctive is its unusually wide mortar joints. Irregular split stones are stacked with broad bands of pale, hand-rammed binder visible between them, giving the wall a striking, almost graphic appearance quite unlike the tight, dry-laid stonework of older castle walls or the smooth concrete surfaces of later modern construction. That binder is the key to its historical importance.

The Story Behind the Wall: Yamada Saikichi and the Jurakuen Estate

To understand why this embankment exists, you have to know about the man who commissioned it. Yamada Saikichi (1852–1937) was one of the most colorful Nagoya-area entrepreneurs of the Meiji and Taishō periods. Born in Mino Province (today's Gifu City), he is widely credited with inventing moriguchi-zuke, the elegant pickled-radish delicacy still produced today, and he founded businesses ranging from the Kitafuku pickle and canned-food company to Aichi Gas (the predecessor of today's Toho Gas).

In 1916, Yamada opened a sprawling restaurant-inn called Jurakuen on a wooded coastal hill in what was then Ueno Village in Chita District. He even relocated an entire ryokan building from in front of Ise Grand Shrine to use as the main inn. The name Jurakuen — meaning "garden of gathered pleasures" — was an homage to Toyotomi Hideyoshi's famous Jurakudai palace in Kyoto, which Yamada deeply admired.

Jurakuen quickly became one of the most fashionable resorts on the Ise Bay coast, drawing well-heeled visitors from Nagoya for its sweeping sea views, seasonal gardens, and fine cuisine. To make access easier, Yamada donated land to the Aichi Electric Railway so that a new "Jurakuen Station" could be built right at the foot of his estate. Down by the water, beside the original station site, he built a seaside annex on a parcel of land he had reclaimed from the bay. It is precisely this reclaimed parcel that the present-day stone embankment encloses.

After Yamada's death in 1937, the property passed through his family, eventually coming into the Shujo family — descendants of his third daughter, Ikuko Shujo. Hence the property's current official name: "Shujo Family Residence (Former Yamada Family Residence) Stone-Built Embankment."

Why It Was Designated a National Cultural Property

The Council for Cultural Affairs registered this embankment in 2024 because it is a rare and exceptionally well-preserved example of the jinzōseki kōhō, or "artificial stone method," a uniquely Japanese civil-engineering technique developed in the late 19th century. The wide joints between the split stones are not a stylistic choice — they are filled with the very material that gives the method its name and its strength.

According to the official designation summary, the wall is built by hard-ramming a mixture of slaked lime (shōsekkai) and decomposed granite soil (masa-tsuchi) into the gaps between split stones, producing a structure with a distinctive wide-jointed appearance. The Cultural Affairs Agency calls it "a precious surviving example of the artificial stone method devised by Hattori Chōshichi."

Surviving examples of full-scale civil engineering structures built with this method are now scarce. Most have been lost to coastal industrial development, replaced by reinforced concrete, or simply submerged beneath later reclamation. That a 76-meter run of original Taishō-period seawall survives essentially intact, on its original site, on the very coast where Hattori Chōshichi himself was born and worked, makes this embankment a heritage object of national significance.

Who Was Hattori Chōshichi? The Father of "Choshichi-Tataki"

Hattori Chōshichi (1840–1919) was a self-taught civil engineer from Hekikai District in Mikawa Province (today's Hekinan City, Aichi), the son of a plasterer. Working from an artisan tradition rather than a university engineering background, he transformed an old domestic flooring technique called tataki — a hand-rammed mixture of clay, lime, and brine traditionally used for the earthen floors of farmhouses and shops — into a heavy-duty material capable of building harbor walls, river embankments, and irrigation works at industrial scale.

His refined version, sometimes called Chōshichi-tataki in his honor, mixed slaked lime with locally abundant decomposed-granite soil. When packed against split stones and rammed hard, the mixture cured into a remarkably strong, water-resistant matrix — comparable in strength to early Portland cement concrete, but at a fraction of the cost. Between the late 1870s and the early 1900s, Hattori's method was used in major civil engineering projects across western and central Japan, including the Ujina Port quaywall in Hiroshima, the Kanō Shinden seawall in Toyohashi, and the headworks of the Meiji-Yōsui irrigation canal in today's Toyota City. For these contributions to Japan's modernization he received the Green Ribbon Medal of Honor.

The artificial stone method dominated Japanese civil engineering for roughly a quarter century before being eclipsed by the spread of imported reinforced concrete in the early 20th century. The Shujo Family embankment, built in the early Taishō period (1912–1918), comes from the very twilight of the technique — making it both technically refined and historically poignant.

What to Look For: The Visual Highlights

If you stop to study the wall from the public side, three features repay close attention. First is the wide-jointed appearance itself. Where most stone walls minimize their mortar lines, here the pale rammed binder is unapologetically visible, giving the surface a rhythmic, mosaic-like quality that ages beautifully under salt air and lichen.

Second is the way the embankment turns the corner of the reclaimed parcel. Stone embankments built in the Meiji and Taishō periods often had to negotiate awkward shoreline geometries, and the way the wall bends around the property's northwest, north, and south faces shows craftsmen working confidently with the demands of an irregular site.

Third — and most evocative — is the simple fact that you are looking at the visible edge of a vanished landscape. When this wall was built, the Ise Bay shoreline came right up to its base; bathers walked from Jurakuen's seaside annex straight onto the sand. Today the bay has been pushed far west by decades of postwar industrial reclamation around Aichi Steel and the modern Port of Nagoya, but the wall remains exactly where Yamada Saikichi planted it, a quiet survivor of a coastline that no longer exists.

Visiting Information and Etiquette

An important note for visitors: the Shujo Family Residence is a private home, and the embankment is private property. There is no interior access, no on-site museum, no admission ticket, and no organized tours. The wall can, however, be appreciated from publicly accessible streets and from the perimeter of nearby Jurakuen Park, particularly from the area northwest of the park near the original Jurakuen Station site.

Visitors are kindly asked to view the property only from public rights-of-way, to refrain from entering the grounds or peering over fences, and to keep voices low out of respect for residents. The embankment is best appreciated as part of a wider walking visit to the Jurakuen Park area, where the connections to Yamada Saikichi's vision are everywhere on display.

The nearest station is Meitetsu Jurakuen Station on the Meitetsu Tokoname Line, roughly 15–20 minutes by limited express from Meitetsu Nagoya Station. From the station, Jurakuen Park lies a short walk to the east; the embankment is reached by walking around the park's northwestern edge, in the Sazaki area of Nawa-chō. Local maps and the Tokai City tourism information service can help identify the exact viewing approach.

Surrounding Attractions: Making a Day of It

Because the embankment itself is best understood in the context of Yamada Saikichi's broader Jurakuen estate, the natural way to visit is to combine it with the surrounding park.

The undisputed centerpiece is the Jurakuen Great Buddha (Jurakuen Daibutsu), an 18.79-meter Amida Nyōrai seated figure that Yamada commissioned in 1924 and dedicated in 1927 to commemorate the marriage of the future Emperor Shōwa. It was the first reinforced-concrete great Buddha ever built in Japan, and at the time of its completion the largest Buddha statue in the country — taller than both the Great Buddha of Kamakura and the Great Buddha of Tōdai-ji in Nara. Recent research has confirmed that several elements around the Buddha — including the foundations, the great stone lanterns, the incense burner, and parts of the approach handrails — were also built using Hattori Chōshichi's artificial stone method, making the wider Jurakuen complex one of the most significant concentrations of jinzōseki heritage in Japan.

Within the same park, you will also find the pair of Niō guardian statues (a Tokai City designated cultural property), the Yakan-ike pond, the Ōmeian teahouse — a public tea room built in 1996 and named after the Edo-period Confucian scholar Hosoi Heishū, who was born locally — and the integrated wellness facility known as Shiawase Mura. The park is especially beautiful in autumn, when its hundreds of maples turn colour and the Great Buddha is illuminated for the annual momiji festival.

Combine these stops with a return visit to the embankment and you will have walked through, in a single morning, the surviving physical fabric of one Meiji-Taishō entrepreneur's grand coastal vision — a vision that helped shape the modern character of the entire eastern Ise Bay shoreline.