A Forest That Is One Tree
The signboard reads "Kakurega-no-Mori" — Hidden Refuge Forest. What stands before you is not a forest. It is a single camphor tree, vast enough that local custom has called it a wood for at least four centuries. The trunk measures roughly eighteen meters around at chest height. Spread your arms; ten adults would need to link hands to encircle it. The crown reaches some twenty-one meters into the sky and casts a shadow wide enough to cover a small school playground.
The tree grows in Yamada, on the outskirts of Asakura City in Fukuoka Prefecture, in flat rice country just off National Route 386. By traditional reckoning it is around 1,500 years old, which would place its seedling stage somewhere in the late Kofun period, when burial mounds were still being raised in this part of Kyushu.
The Legend Behind the Name
The peculiar name — "Hidden Refuge Forest" — is traced to an Edo-period geographical text, the Chikuzen no Kuni Shoku Fudoki. It records a local tradition: long ago, the Asakura barrier required travellers to declare their names before passing. Those who could not, or would not, do so found themselves stranded. They retreated into the wood that once grew here and waited for darkness, when the gates closed and the guards withdrew. The forest, in other words, served as practical cover for people on the edges of official life — fugitives, the unfree, those whose names carried risk.
The Asakura barrier itself is said to date from 661, when Empress Saimei led her court to the temporary palace of Asakura no Tachibana no Hironiwa on the eve of an expedition to aid the kingdom of Baekje on the Korean Peninsula. The empress died here within months, and the campaign collapsed. The barrier and the stories that grew around it belong to that fraught moment in early Japanese history.
Of the original forest, only this one tree remains. The name endures because the tree alone has the bulk of a small wood.
Why It Is a National Natural Monument
Kakurega-no-Mori is designated a National Natural Monument by the Japanese government — the highest level of protection given to natural features under the Cultural Properties Protection Law. The basis for designation is not the legend but the tree itself: its scale, its age, and its botanical significance.
Camphor trees (Cinnamomum camphora) are common across western Japan, and some of the world's largest specimens grow in Kyushu. Even so, an eighteen-meter girth places this tree among the top ten camphors in the country, in the company of the Kawago-no-Kusu and the Takeo no Ōkusu in neighbouring Saga Prefecture. The interior of the trunk holds a hollow said to be large enough to fit eight tatami mats, the result of centuries of slow internal decay that camphors of this size routinely survive.
What to Look For
The first thing most visitors do is back up. The canopy is so broad that it does not fit into a single photograph from less than thirty paces away. From that distance the trunk reveals itself, dividing into three main limbs at about three meters above the ground — the structural decision the tree made long ago to spread its weight outward rather than upward.
Come closer and the root system takes over. Roots like petrified rivers crawl across the surrounding earth, some thick as a person's torso, others splitting into smaller channels that dive underground. They show the strategy of a tree that has weathered fifteen centuries of Kyushu typhoons: anchor wide, spread the load, let no single weakness become fatal.
The tree is recovering from injury. A typhoon in 1991 broke a major branch and visibly weakened the canopy. From 2006 onward, certified tree doctors have been treating the wounds and reinforcing the structure. Visitors are asked not to compact the soil around the roots — admire from a step back rather than reaching out to touch the bark.
Camphor trees keep their leaves year-round, so there is no off-season. Late April and early May bring the brightest flush of new growth. Winter, with no surrounding rice crops to obscure the view, shows the silhouette best.
Nearby
A short walk from Kakurega-no-Mori brings you to Eso Hachimangu, the principal shrine of the Asakura district, dedicated to Emperor Ōjin, Empress Saimei, and Emperor Tenji. Behind the main hall sit two small circular burial mounds that local tradition identifies as Empress Saimei's temporary tomb — the same empress whose journey to Asakura set the stage for the barrier and, by extension, the legend behind the tree's name. Visiting both sites together makes the seventh-century context visible on the ground.
A short drive west brings you to Hishino, where Japan's only working triple waterwheel still lifts irrigation water from the Chikugo River into the surrounding paddies between June and October. Further north lies Akizuki, a small Edo-period castle town often called the "Kyoto of Chikuzen," and the hot springs of Harazuru offer a place to stay the night within easy reach.
- 📍 Plan Your Visit to Fukuoka
- Find tours, activities & transport passes near Hidden Forest
- [ Dazaifu Tenmangu Shrine & Hakata Food Tours ]
Frequently Asked Questions
- When is the best time to visit?
- The tree can be seen year-round. Late spring (late April through May) brings the most vivid new growth, while winter offers the cleanest view of the overall silhouette without surrounding rice crops.
- Is there an admission fee?
- No. The tree stands in the precincts of a small shrine (Ushi-Tenjinsha) and is open to the public free of charge at all times.
- Can I touch the trunk?
- Touching is not explicitly forbidden, but stepping close to the trunk compacts the soil and damages the surface roots. Since the tree is under active care following typhoon damage, observers are asked to keep a respectful distance.
- How old is it really?
- The figure of 1,500 years is traditional rather than scientifically confirmed; tree-ring dating of a hollow camphor of this size is not currently feasible. What is certain is that the tree was already considered ancient when the Chikuzen no Kuni Shoku Fudoki was compiled in the early eighteenth century.
- How do I get there?
- From JR Futsukaichi Station, take the Nishitetsu Bus toward Haki for about 60 minutes and alight at Eso-no-Shuku. The tree is roughly a three-minute walk from the bus stop. A rental car is the more flexible option, given the rural setting.
Basic Information
| Name | Kakurega-no-Mori (隠家森) |
|---|---|
| Location | Yamada, Asakura City, Fukuoka Prefecture |
| Designation | National Natural Monument (Japan) |
| Species | Camphor tree (Cinnamomum camphora) |
| Estimated age | Approx. 1,500 years (by tradition) |
| Girth at chest height | Approx. 18 m |
| Height | Approx. 21 m |
| Setting | Precincts of Ushi-Tenjinsha Shrine |
| Admission | Free |
| Hours | Open at all times |
| Access | Approx. 60 min by Nishitetsu Bus from JR Futsukaichi Station to "Eso-no-Shuku" stop; 3 min on foot |
References
- Kakurega-no-Mori | Asakura City Official Site (in Japanese)
- https://www.city.asakura.lg.jp/www/contents/1297666891043/index.html
- Kakurega-no-Mori | Asakura Tourist Association (in Japanese)
- https://amagiasakura.net/sightseeing_post/%E9%9A%A0%E5%AE%B6%E6%A3%AE/
- Kakurega-no-Mori | Japan Tree Doctors Association (in Japanese)
- https://jumokui.jp/tree-data/%E9%9A%A0%E5%AE%B6%E6%A3%AE%EF%BC%88%E3%81%8B%E3%81%8F%E3%82%8C%E3%81%8C%E3%81%AE%E3%82%82%E3%82%8A%EF%BC%89/
- Kakurega-no-Mori | Crossroad Fukuoka Tourist Information (in Japanese)
- https://www.crossroadfukuoka.jp/spot/12790
- Eso Hachimangu Shrine | Asakura Tourist Association (in Japanese)
- https://amagiasakura.net/sightseeing_post/esohachimangu/
Last verified: 2026.05.16