Tomoeda Tile Kiln Ruins: One of Kyushu's Oldest Kiln Sites
Hidden in the quiet hills of Kōge Town in Fukuoka Prefecture, the Tomoeda Tile Kiln Ruins (友枝瓦窯跡, Tomoeda Kawara Gama Ato) are a remarkably well-preserved archaeological treasure dating back to the late 7th century. Designated as a National Historic Site of Japan in 1922, this ancient kiln complex offers a rare window into the early days of roof tile production in Japan and the profound cultural exchange between the Japanese archipelago and the Korean Peninsula during the Asuka and Nara periods.
For history enthusiasts and cultural travelers seeking authentic experiences beyond Japan's well-known tourist destinations, the Tomoeda Tile Kiln Ruins provide a unique opportunity to step inside a kiln that has remained largely intact for over 1,300 years.
History and Significance
The art of making fired clay roof tiles, known as kawara (瓦), was introduced to Japan from the Korean kingdom of Baekje during the 6th century, arriving alongside Buddhism and advanced construction techniques. During this period, tiled roofs symbolized great prestige and authority, reserved exclusively for temples and government buildings. The Tomoeda Tile Kiln was established in the late 7th century to produce roof tiles for the Tarumi Temple (垂水廃寺), a Buddhist temple that once stood approximately two kilometers to the northeast, near the present-day Minami Yoshitomi Elementary School.
The kiln site comprises four individual kilns, discovered over the course of the 20th century. The first two were identified in 1913, with additional kilns confirmed through subsequent archaeological excavations. Among these, one kiln is in an exceptional state of preservation, with its internal structure almost entirely intact — a rarity among ancient kiln sites in Japan.
What makes the Tomoeda kilns particularly significant is the evidence of Korean Peninsula influence found in the excavated tiles. Two distinct styles have been identified: Silla-style tiles featuring arabesque patterns with thin circle lines around the outer edge, and Baekje-style tiles decorated with lotus patterns and single circles around the periphery. These findings reveal the deep connections between the Buzen region of northern Kyushu and the kingdoms of ancient Korea, shedding light on the cultural networks that shaped early Japanese civilization.
Why It Was Designated a National Historic Site
The Tomoeda Tile Kiln Ruins were designated a National Historic Site on October 12, 1922, making them one of the earliest archaeological sites to receive national protection in Japan. Several factors contributed to this prestigious designation:
- The kiln is among the oldest of its kind in the Kyushu region, dating to the late 7th century during the Asuka period.
- One of the four kilns retains its original internal structure in remarkably good condition, providing invaluable insight into ancient tile-making technology.
- The discovery of both Silla-style and Baekje-style roof tiles at the site offers important evidence of international cultural exchange in ancient Japan.
- The kiln was constructed by carving a tunnel-like passage into the natural rock of a hillside, representing a sophisticated underground ascending kiln (chikashiki yūkai yūdan noborigama) — a rare type in Kyushu.
The site was initially managed by the former village of Ōhira and is now under the care of Kōge Town, which assumed management responsibilities following municipal consolidation.
What to See: Inside the Ancient Kiln
The highlight of a visit to the Tomoeda Tile Kiln Ruins is the opportunity to observe the interior of the best-preserved kiln. The firing chamber measures approximately 6.15 meters in length, with a stepped floor consisting of 17 stages where roof tiles were carefully arranged for firing. The arched ceiling of the kiln still survives, and at the top of the structure, two smoke vents (flues) are visible — openings through which heat and smoke would have escaped during the firing process.
The construction technique is fascinating: rather than building the kiln from stacked materials, the ancient craftsmen carved directly into the natural rock layer of the hillside, creating a tunnel-shaped chamber. This approach not only provided excellent insulation for maintaining high firing temperatures but also ensured the remarkable durability that has allowed the kiln to survive for more than a millennium.
The surrounding hillside itself tells part of the story. Scattered fragments of ancient roof tiles can still be found in the area, silent witnesses to the centuries of production that took place here. Identical tile fragments have been excavated from the nearby Tarumi Temple ruins, confirming the direct link between these two historic sites.
The Buzen Connection: A Region of Ancient Heritage
The Tomoeda Tile Kiln Ruins are situated within the historical province of Buzen, a region in northern Kyushu that played a critical role during Japan's formative centuries. Kōge Town, located in the area historically known as Kami-Mitsuke District (上三毛郡), was once a center of regional administration during the Ritsuryō period, as evidenced by the nearby Ōnose Government Office Ruins (大ノ瀬官衙遺跡), another nationally designated historic site.
This cluster of significant archaeological sites — the tile kiln, the temple ruins, the government office, and ancient burial mounds — paints a vivid picture of a prosperous region deeply connected to continental Asian cultures. The area was strategically positioned along routes linking the Japanese court with the Korean Peninsula and mainland China, making it a natural conduit for the transmission of Buddhist culture, administrative practices, and craft technologies.
Nearby Attractions
A visit to the Tomoeda Tile Kiln Ruins can be enriched by exploring the wealth of cultural and natural attractions in and around Kōge Town:
- Anagahayama Tumulus (穴ヶ葉山古墳) — A nationally designated ancient burial mound from the early 7th century, featuring a massive stone chamber approximately 10 meters in length with wall paintings depicting birds, leaves, and human figures.
- Ōnose Government Office Ruins (大ノ瀬官衙遺跡) — The remains of a Nara-period regional government office, offering insight into ancient administrative systems in the Buzen region.
- Ōike Park (大池公園) — Kōge Town's main recreational area, featuring a 1.4-kilometer lakeside walking path, log cabins, tree houses, an athletic playground, and seasonal illumination events.
- Yunohazama Onsen Taiheiraku (湯ノ迫温泉大平楽) — A popular hot spring complex with outdoor baths, saunas, a local products shop, and a traditional theater.
- Michi no Eki Shin Yoshitomi (道の駅しんよしとみ) — A roadside station offering local agricultural products, crafts, and regional cuisine.
Visiting Tips
The Tomoeda Tile Kiln Ruins are located in a peaceful rural setting surrounded by rice paddies and forested hills. The exterior of the site is open to the public at all times. However, to view the interior of the kiln, advance arrangements must be made by contacting the Kōge Town Board of Education (Ōhira Branch). Signage and information at the site is primarily in Japanese, so visitors may wish to prepare translations or travel with a guide.
The best seasons to visit are spring (March to May) and autumn (September to November), when the weather is mild and the surrounding countryside is especially beautiful. The area is also a delight for cycling enthusiasts, as Kōge Town promotes cultural heritage cycling tours connecting its many historic sites.
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Q＆A
- How old are the Tomoeda Tile Kiln Ruins?
- The kilns date back to the late 7th century (Asuka period), making them approximately 1,300 years old and among the oldest kiln sites in the Kyushu region.
- Can I enter the kiln?
- The exterior is freely accessible at all times. To view the interior, you need to arrange a visit in advance by contacting the Kōge Town Board of Education, Ōhira Branch (phone: 0979-72-2111, weekdays 8:30–17:00). Please note that conservation work may occasionally restrict access.
- Is there an admission fee?
- No, there is no admission fee to visit the Tomoeda Tile Kiln Ruins.
- How do I get there from the nearest train station?
- The nearest major station is JR Nakatsu Station. From there, the site is approximately a 20-minute drive by car or taxi. Public transportation options are limited, so renting a car is recommended for the most convenient access.
- Are there English-language signs at the site?
- Information at the site is primarily in Japanese. Visitors are advised to research the site beforehand or arrange a local guide through the Kōge Town tourism office for a more informative experience.
Basic Information
| Official Name | 友枝瓦窯跡 (Tomoeda Kawara Gama Ato / Tomoeda Tile Kiln Ruins) |
|---|---|
| Designation | National Historic Site (designated October 12, 1922) |
| Period | Late 7th century (Asuka period) |
| Location | Tosai, Kōge-machi, Chikujō-gun, Fukuoka Prefecture (福岡県築上郡上毛町大字土佐井1696-2) |
| Access | Approximately 20 minutes by car from JR Nakatsu Station |
| Admission | Free (interior viewing requires advance appointment) |
| Contact | Kōge Town Board of Education, Ōhira Branch — Phone: 0979-72-2111 (weekdays 8:30–17:00) |
| Management | Kōge Town (上毛町) |
References
- 友枝瓦窯跡 — 文化遺産オンライン
- https://bunka.nii.ac.jp/heritages/detail/163871
- 友枝瓦窯跡 — 福岡県の文化財
- https://www.fukuoka-bunkazai.jp/frmDetail.aspx?db=4&id=41
- 国史跡友枝瓦窯跡 — 上毛町公式サイト
- https://www.town.koge.lg.jp/soshiki/ohira/1/1_1/765.html
- Tomoeda Tile Kiln Site — Wikipedia
- https://en.wikipedia.org/wiki/Tomoeda_Tile_Kiln_Site
- 上毛町観光ガイド — クロスロードふくおか
- https://www.crossroadfukuoka.jp/areaguide/kogemachi
Last verified: 2026.03.09