Heijokyo Sakyo Sanjo Nibonomiya Ruins Garden

Heijo-kyo Sakyo Sanjo Nibo Palace Garden Site: A 1,200-Year-Old Time Capsule of Nara-Period Aesthetics

Tucked away in a quiet corner of modern Nara City, the Heijo-kyo Sakyo Sanjo Nibo Palace Garden Site (Heijōkyō Sakyō Sanjō Nibō Miya-ato Teien) offers something extraordinary: an authentic Nara-period garden, preserved underground for more than a millennium, now displayed almost exactly as archaeologists found it. Created around 750 AD when Nara was Japan's imperial capital, this graceful S-shaped pond garden was once the setting for elegant courtly banquets where nobles composed poetry beside flowing water. Today, it stands as one of only three ancient gardens in all of Japan to hold the country's two highest cultural designations simultaneously, offering visitors a rare and intimate window into the refined sensibilities of the eighth-century imperial court.

The Story of a Buried Garden Brought Back to Light

The garden's rediscovery is itself a remarkable tale. In 1975, when construction was planned for the relocation of the Nara Post Office, the Nara National Research Institute for Cultural Properties conducted a routine excavation of the site. What they uncovered exceeded all expectations: a large-scale Nara-period garden complex with a pebble-paved pond, the remains of twelve buildings, seven fences, two wells, and eight drainage ditches. The state of preservation was so exceptional that the discovery was hailed as a "Nara-period time capsule"—a pristine glimpse of an aesthetic world that had lain undisturbed for over twelve centuries.

The garden occupies the sixth tsubo (a Heijo-kyo city block) of Sakyo Sanjo Nibo, the ancient address that gives the site its formal name. Researchers have determined that the garden was constructed around the late Tenpyo era (circa 750 AD) and remained in use until the early Heian period (around 800 AD), spanning roughly half a century of intensive courtly use before being gradually abandoned and finally buried by the soils of time.

Why This Garden Holds the Status of a Cultural Treasure

In 1978, the site was designated a National Special Historic Site (Tokubetsu Shiseki) in recognition of its unparalleled archaeological value. The remarkable preservation of the original pond, the scale of the surrounding architectural remains, and the close apparent connection to the Heijo Palace itself made the find one of the most significant archaeological discoveries of postwar Japan. Roof tiles uncovered at the site match those used at the Heijo Palace, and wooden tablets (mokkan) recovered from the area suggest the garden may have served as an imperial detached palace or as the residence of a member of the imperial family.

In 1992, a second designation was added: National Special Place of Scenic Beauty (Tokubetsu Meishō). This honored the garden's exceptional value as an artistic creation, demonstrating with extraordinary clarity the design principles, ground-plan layout, and gardening techniques of ancient Japan. Holding both designations places this site among an exclusive group: only three ancient gardens in Japan have ever received both honors. The other two are the East Palace Garden within the Heijo Palace Site and Mōtsū-ji Garden in Iwate Prefecture. Locally, these dual-designated gardens are sometimes affectionately called "national treasures of the garden world."

Highlights and Features to Discover

The heart of the experience is the pond itself. Stretching about 55 meters from north to south with an average width of 15 meters, the pond curves gently in an elegant S-shape, lined with carefully placed flat pebbles known as tamaishi. Its meandering form is no accident: this winding waterway was almost certainly designed for kyokusui no en, the ancient "winding stream banquet" in which courtiers seated along the bank would compose a poem before a floating cup of sake reached them. Failing to compose in time meant drinking the cup—a charming forfeit that survives in Japanese cultural memory to this day.

Visitors can also admire the reconstructed wooden fence that once enclosed the garden, as well as a graceful viewing pavilion with a cypress-bark (hinoki-buki) roof, both rebuilt based on the archaeological evidence. From inside this pavilion, you can sit and contemplate the pond just as Nara-period nobles might have done. Particularly notable are the carefully arranged landscape stones (keiseki) at the water's edge—these are not modern additions but the original stones placed here in the eighth century, their precise positions and angles preserved as part of the protected cultural heritage. The "cobble beach" (suhama) along the water's edge is considered the earliest known example of this iconic Japanese garden feature.

Additional highlights include the underground wooden conduit system that once channeled water into the pond from a nearby river, dual drainage devices at the southern end, and traces of wooden frames that appear to have supported aquatic plants. Each detail reveals the technical sophistication of Nara-period landscape engineering.

Visitor Information and Practical Tips

Admission to the garden is free, and visitors can explore at their own pace. The grounds are compact but rewarding—plan on around thirty to forty-five minutes to take in the pond, walk the surrounding lawns, and rest inside the reconstructed pavilion. Information panels are present on site, but visitors who wish to deepen their understanding may want to read up briefly before arrival, as English-language signage is limited.

Following a major six-year conservation project that began in 2014, the garden was reopened to the public in June 2020 with refreshed plantings and stabilized stonework. The site is now in excellent condition, and the calm, residential setting offers a quiet contrast to the busier sightseeing routes around Nara Park.

Surrounding Attractions

The garden makes an excellent starting point for exploring the wider story of Heijo-kyo, Japan's eighth-century capital. Within easy reach are several remarkable sites that together paint a fuller picture of Nara-period civilization.

• Heijo Palace Site Historical Park: The vast remains of the imperial palace complex itself, including the magnificent reconstructed Daigokuden (Great Audience Hall) and Suzakumon Gate, located about 1 kilometer to the north.
• East Palace Garden (Tōin Teien): Another Special Place of Scenic Beauty within the Heijo Palace grounds, offering a complementary view of Nara-period garden art.
• Hokke-ji Temple: A nationally important nunnery founded by Empress Komyo, home to a celebrated National Treasure statue of Eleven-Headed Kannon.
• Kairyuo-ji Temple: A small but historically rich temple housing several designated cultural properties.
• Central Nara: The famous Nara Park, Todai-ji, and Kasuga Taisha are about 25 minutes east by train or bus, making it easy to combine this garden with the city's better-known landmarks.