Shigaraki Palace Ruins: Emperor Shōmu's Phantom Capital in the Mountains
Deep in the forested hills of Shiga Prefecture, where the ancient ceramic town of Shigaraki quietly thrives, lie the ruins of one of Japan's most enigmatic imperial capitals. The Shigaraki Palace Ruins (紫香楽宮跡, Shigaraki-no-miya Ato) preserve the remains of a grand but short-lived capital built by Emperor Shōmu in the 8th century — a place where Japan's Great Buddha was first conceived before being realized at Tōdai-ji in Nara.
Designated as a National Historic Site, this archaeological complex spans multiple districts across Kōka City and offers visitors a rare chance to walk among 1,280-year-old foundation stones while contemplating one of the most dramatic episodes in Japanese political and religious history.
Historical Background: A Capital Born of Faith and Political Turmoil
The story of Shigaraki Palace begins in the turbulent 740s, when Emperor Shōmu (701–756) found himself grappling with political upheaval and personal spiritual convictions. Following the Rebellion of Fujiwara no Hirotsugu in 740, the emperor abandoned the established capital at Heijō-kyō (Nara) and embarked on a remarkable series of capital relocations — first to Kuni-kyō in present-day Kyoto Prefecture, and then to this remote mountain basin in Ōmi Province.
In 742, Emperor Shōmu ordered the construction of a detached villa in the Shigaraki region, a small basin surrounded by mountains along the upper reaches of the Ōdo River. He visited frequently, and by 743, he had announced his momentous plan to construct a colossal statue of Vairocana Buddha (Rushana-butsu) at nearby Kōka-ji Temple — modeled after the famous Longmen Grottoes in Tang dynasty China. By November 744, the central support pillar of the Great Buddha had been erected at Kōka-ji.
In January 745, Shigaraki was officially proclaimed the "new capital," and the palace was renamed Kōka-no-miya. However, the grand ambition was not to last. Resistance from courtiers who considered the mountain location too remote, combined with a series of natural disasters including wildfires and earthquakes, forced Emperor Shōmu to abandon Shigaraki and return to Heijō-kyō after just five months as capital. The Great Buddha project was transferred to Tōdai-ji, where it was eventually completed as the famous Nara Daibutsu in 752.
Why Shigaraki Palace Is Designated a National Historic Site
The Shigaraki Palace Ruins were first designated as a National Historic Site in 1926, with significant expansions added in 2005, 2010, and 2015. The site holds exceptional archaeological and historical significance for several reasons.
First, the ruins represent one of the few identified imperial palace sites from the Nara period outside of Heijō-kyō itself. Archaeological excavations have revealed that contrary to literary sources suggesting a temporary, makeshift palace, the Shigaraki Palace was a fully developed imperial complex with formal administrative buildings, broad avenues, and elaborate infrastructure.
Second, excavations at the Miyamachi Site have yielded more than 7,000 wooden tablets (mokkan), making it second only to Heijō-kyō in the number of such finds. Among these, the discovery in 2008 of "uta mokkan" — poetry tablets bearing verses identical to those in the Man'yōshū (Collection of Ten Thousand Leaves) — was groundbreaking. These tablets contain the "Asakayama" poem from Book 16 and the famous "Naniwa-zu" poem, written in man'yōgana script, and predate the compilation of the Man'yōshū itself. This makes them invaluable primary sources for understanding how Japan's oldest poetry anthology was formed.
Third, the Dairino Site preserves over 335 original foundation stones from the Nara period across an area spanning 90 meters east-to-west and 110 meters north-to-south. The temple layout mirrors that of Tōdai-ji, providing crucial evidence of Buddhist architectural planning in the 8th century. The exceptional preservation of these foundation stones — still in their original positions after nearly 1,300 years — is extremely rare among ancient Japanese sites.
The Five Districts of the Ruins
The designated historic site comprises five distinct areas, each revealing different aspects of the ancient palace complex.
Miyamachi District (宮町地区)
Now identified as the actual site of the imperial palace, the Miyamachi District contains the central administrative buildings arranged in a U-shaped configuration — a main hall (seiden) flanked by east and west wing buildings. Large structures to the north of the main hall are believed to be the emperor's private quarters (dairi). Numerous wooden tablets and ink-inscribed pottery have been excavated here, and the site features a small exhibition room displaying artifacts from the excavations.
Dairino District (内裏野地区)
Originally believed to be the palace site, the Dairino District is now identified as the ruins of Kōka-ji Temple (or possibly the provincial temple of Ōmi Province). Set on a pine-covered hilltop, this is the most visually impressive area, where visitors can see hundreds of original foundation stones arranged in a layout identical to Tōdai-ji — including the remains of a main hall (kondō), lecture hall, monks' quarters, sutra repository, bell tower, and pagoda enclosure.
Shingū Shrine District (新宮神社地区)
Located between the Miyamachi and Dairino districts, this area preserves the remains of what are believed to be main thoroughfares — roads 12 and 18 meters wide, complete with drainage ditches. Bridge pilings made of Japanese cypress were found here, dated to 744 through dendrochronology. These roads are thought to represent the "Suzaku-ji" (main avenue) connecting the palace to the temple.
Kajiyashiki District (鍛冶屋敷地区)
Discovered during the construction of the Shin-Meishin Expressway, this area contains the remains of metalworking workshops, including casting furnaces and crucibles. The presence of these facilities indicates that metal casting — possibly related to the Great Buddha project — was carried out within the palace precinct.
Kita-Kinose District (北黄瀬地区)
Located on the western side of the basin, this area features a well structure with a square frame measuring 1.8 meters per side, housed within a roofed shelter. The cypress wood of the well frame has been dated to 743, demonstrating that the palace's infrastructure extended across a wide area.
Highlights and Attractions for Visitors
The Shigaraki Palace Ruins offer an experience quite unlike visiting a reconstructed castle or temple. Here, the appeal lies in the atmospheric encounter with raw archaeological remains set in a beautifully forested landscape.
At the Dairino District, walking among the 335 exposed foundation stones beneath a canopy of pine trees creates a powerful sense of connection to the Nara period. Interpretive panels with CG reconstructions help visitors visualize the grand temple complex that once stood here. The silence and solitude of the site — far from the tourist crowds of Nara or Kyoto — make it ideal for contemplative exploration.
The Miyamachi Exhibition Room (宮町事務所 展示室) displays excavated artifacts including wooden tablets, pottery, and roof tiles. Though small, it provides essential context for understanding the scale and significance of the palace complex. The exhibition room is open on weekdays from 8:30 to 17:00.
The surrounding landscape itself is a highlight. The small mountain basin retains much of its ancient character — visitors can appreciate the same three-sided mountain enclosure that Emperor Shōmu would have seen over 1,200 years ago. The Tōkai Nature Trail passes through the Dairino District, making it a pleasant stop on a longer hiking itinerary.
Combining with Shigaraki's Ceramic Culture
A visit to the Shigaraki Palace Ruins pairs naturally with exploring the town of Shigaraki, one of Japan's Six Ancient Kilns and famous worldwide for its distinctive stoneware pottery. The Shigaraki Ceramic Cultural Park (滋賀県立陶芸の森) offers exhibitions, artist residencies, and outdoor sculpture, while the traditional kiln district features charming streets lined with workshops where visitors can try pottery-making firsthand.
The MIHO MUSEUM, designed by renowned architect I.M. Pei and set dramatically in the surrounding mountains, houses an exceptional collection of art from both Eastern and Western civilizations. In 2025, the museum held a special exhibition titled "Shigaraki Palace and the Gods and Buddhas of the Kōka Region," directly connecting the palace ruins with the broader cultural heritage of the area.
Other nearby attractions include Gyokukeiji Temple (玉桂寺), which houses a Kamakura-period Amida Buddha statue designated as an Important Cultural Property, and the Kōka Ninja Village (甲賀の里忍術村), offering a playful contrast to the archaeological solemnity of the palace ruins.
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Q＆A
- Is there an admission fee to visit the Shigaraki Palace Ruins?
- No, the ruins are open to the public free of charge at all times. The Miyamachi Exhibition Room is also free to enter during its opening hours (weekdays 8:30–17:00; closed on weekends and holidays).
- How can I get to the Shigaraki Palace Ruins by public transportation?
- Take the JR Biwako Line to Kusatsu Station, transfer to the JR Kusatsu Line to Kibukawa Station, then take the Shigaraki Kōgen Railway to Shigarakigūshi Station. From the station, the Dairino District is about a 10-minute walk. The Miyamachi District is approximately 1.5 km north of the Dairino District. Note that trains on the Shigaraki Kōgen Railway run approximately once per hour.
- Are English-language explanations available at the site?
- Interpretive signage is primarily in Japanese, though some panels include brief English explanations. It is recommended to research the site before visiting or to use a translation app. The CG reconstruction images on the panels are helpful regardless of language.
- What is the connection between the Shigaraki Palace Ruins and the Great Buddha of Nara?
- Emperor Shōmu originally planned to build the monumental Vairocana Buddha statue at Kōka-ji Temple near the Shigaraki Palace. When the capital was abandoned in 745, the project was relocated to Tōdai-ji in Nara, where it was completed as the famous Nara Daibutsu in 752. The temple layout at the Dairino District mirrors that of Tōdai-ji, reflecting this shared origin.
- How much time should I set aside to visit the ruins?
- Allow at least 1–2 hours to explore the Dairino District (foundation stones) and Miyamachi District (palace site and exhibition room). If you plan to combine your visit with Shigaraki's ceramic attractions or the MIHO MUSEUM, a full day is recommended.
Basic Information
| Official Name | Shigaraki Palace Ruins (紫香楽宮跡 / しがらきのみやあと) |
|---|---|
| Designation | National Historic Site (designated 1926; expanded 2005, 2010, 2015) |
| Historical Period | Nara Period, Tenpyō era (742–745 CE) |
| Associated Figure | Emperor Shōmu (聖武天皇, 701–756) |
| Location | Shigaraki-chō (Kinose, Maki, Miyamachi districts), Kōka City, Shiga Prefecture |
| Access | Shigaraki Kōgen Railway "Shigarakigūshi" Station, then 10-minute walk (Dairino District); or "Kumoi" Station, then 15-minute walk (Miyamachi District) |
| By Car | Approximately 10 minutes from Shigaraki IC on the Shin-Meishin Expressway. Free parking available at Shigarakigūshi Station and near the Dairino District. |
| Admission | Free |
| Exhibition Room Hours | Weekdays 8:30–17:00 (Miyamachi District); closed on weekends and holidays |
| Key Features | 335 original Nara-period foundation stones (Dairino District); 7,000+ wooden tablets (mokkan) excavated; Man'yōshū poetry tablets (uta mokkan) |
References
- 紫香楽宮跡 - Wikipedia
- https://ja.wikipedia.org/wiki/%E7%B4%AB%E9%A6%99%E6%A5%BD%E5%AE%AE%E8%B7%A1
- Shigaraki Palace - Wikipedia
- https://en.wikipedia.org/wiki/Shigaraki_Palace
- 紫香楽宮跡（甲賀寺跡）| 滋賀県観光情報
- https://www.biwako-visitors.jp/spot/detail/1699/
- 紫香楽宮跡 - 文化遺産オンライン
- https://bunka.nii.ac.jp/heritages/detail/201946
- 史跡紫香楽宮跡（宮町地区）歌木簡と歌墨書土器 - 文化遺産オンライン
- https://bunka.nii.ac.jp/heritages/detail/237761
- 紫香楽宮跡 | じゃらんnet
- https://www.jalan.net/kankou/spt_25367af2170018179/
- 陶都・信楽窯元と紫香楽宮跡コース | 滋賀県観光情報
- https://www.biwako-visitors.jp/course/detail/6/
Last verified: 2026.03.11