A Thousand-Year-Old Tree in the Middle of the Road
Where two prefectural roads meet in the town of Higashiagatsuma, a single old tree occupies the triangular island at the center of the junction. Traffic curves past it on every side. This is the Great Zelkova of Haramachi (Haramachi no Okeyaki), a zelkova thought to have been growing here for roughly a thousand years. On 13 April 1933 it was registered as a National Natural Monument, the protective designation Japan reserves for trees, geological features, and animal habitats of outstanding scientific or cultural worth.
The zelkova, Zelkova serrata, is called keyaki in Japanese. It is a tall deciduous member of the elm family, valued for centuries as a timber for temples and fine joinery, and admired for the broad fan of branches a mature specimen throws into the sky. The Haramachi tree today rises about 17 metres and measures roughly 9 metres around the trunk at chest height. Those figures describe a tree that has shrunk: a century ago it was considerably larger, and what stands now is the surviving core of something far grander.
The Tree That Set Out a Town
Long before any road was paved here, the zelkova was already old. Local accounts hold that by the early seventeenth century it had grown into a dense, towering tree, and that the people who planned the settlement below it built their streets around it.
The story belongs to the Sanada clan. Iwabitsu Castle, a Sanada stronghold, stood on the mountain ridge to the north. Around 1614 the castle keeper, Ideura Morikiyo, is said to have laid out the new town of Haramachi on the orders of Sanada Nobuyuki. According to the tradition, he sighted a straight line between a pair of rocks behind Iwabitsu Castle and the great zelkova, made that line the town's main street, and opened the settlement along both sides of it. When the castle itself was dismantled the following year, the surrounding district passed firmly into Sanada hands, and the town the tree had anchored became permanent.
The zelkova also played a quieter role. In traditional Japanese geomancy the northeast is the kimon, the "demon's gate," an inauspicious direction from which misfortune was believed to enter. A large tree standing in that quarter was treated as a guardian, and Haramachi's residents regarded the zelkova that way. They called it the tsukinoki, an old word for the zelkova, and the name attached itself so firmly to the place that the intersection where the tree stands is still called the Tsukinoki crossing.
One of Japan's Three Great Zelkovas
The tree's national reputation rests on its sheer scale. In 1932 the botanist Miyoshi Manabu surveyed it and confirmed the species. His measurements record a circumference of 16.89 metres at the base and 10.97 metres at a point 1.5 metres up the trunk, with branches that reached 22 metres toward the northeast and 14.5 metres to the south. Miyoshi ranked the Haramachi zelkova alongside the great zelkovas of Higashine and Mie as one of the three finest in the country.
The official designation record from the 1930s describes the trunk dividing into six massive limbs at a height of about six metres, with a girth at eye level near 14 metres, and notes the tree as vigorous and representative of the species at its largest. Comparing those older figures with the present ones shows how much the tree has changed. The decline is plain in the numbers, and it is plain to anyone standing in front of it.
A National Natural Monument designation does not promise that a tree will last forever. It records that the tree mattered enough, scientifically and to the community, to be placed under the nation's protection. For the Haramachi zelkova, that recognition arrived while the tree was still in reasonable health, and it has shaped how the town has cared for it since.
What You See Today
The zelkova that visitors meet now is a tree in old age, and it does not hide the fact. From the 1960s its vigour began to fail, a decline blamed in part on its difficult position: an island ringed entirely by road, with no open ground for roots to spread. Most of the great limbs are gone. The trunk has opened into a wide hollow, and the tree survives largely because a root has grown down inside that cavity and taken hold. Steel poles brace what remains.
It is, frankly, a worn and weathered thing. But there is something to read in every part of it. The hollow shows the thickness the trunk once had. The single heavy branch that still carries leaves puts out fresh green each spring and turns in autumn, proof that the tree is alive rather than merely standing. A stone marker and an explanation panel sit at the base, the panel carrying an older photograph that shows the fuller, well-balanced crown the tree wore before its decline. Reading the panel and then looking up is the clearest way to grasp what has been lost and what endures.
The town has also looked to the future. A clone raised from the original tree is being grown at the Higashiagatsuma sports ground, so that the line of the thousand-year zelkova can continue even after the parent is gone.
Visiting the Tree
The zelkova stands in the open at the Tsukinoki intersection in the Haramachi district of Higashiagatsuma, and it can be seen at any hour and in any season; there is no gate and no admission charge. It is about a ten-minute walk from Gunma-Haramachi Station on the JR Agatsuma Line. Drivers usually leave their cars at a nearby shop or lot rather than on the roadside.
One practical caution: the tree sits in the middle of live traffic. Reaching the central island means crossing at the pedestrian signals, and the safest viewing is done from the marked safety zone or from the pavements that face it. Spring brings the new leaves, and autumn the colour, but the bare structure of winter arguably shows the tree's history most honestly.
Around Haramachi
The town that the zelkova helped lay out is worth walking. The straight street running from the Tsukinoki crossing is the very axis described in the old town-planning account, and the grid still follows it. Higashiagatsuma sits in the Agatsuma valley, a corridor of mountains, river terraces, and hot springs in northwestern Gunma.
The Sanada connection continues at the Iwabitsu Castle ruins, set on Mount Iwabitsu north of the town and designated a National Historic Site; the mountain is also a popular and dramatic hike. Further along the valley lie the hot-spring towns of the Nakanojo area and, beyond them, the secluded baths of Shima Onsen. The wider region around Ikaho and the Haruna highlands is within an easy drive for those continuing on.
- 📍 Plan Your Visit to Gunma
- Find tours, activities & transport passes near Haramachi's Large Zelkova Tree
- [ Kusatsu Onsen & Tomioka Silk Mill Heritage Tours ]
Q&A
- How old is the Great Zelkova of Haramachi?
- Its age is estimated at about a thousand years. Like most estimates for very old trees this is not exact, but it is consistent with the tree's recorded size and with written accounts describing it as already ancient four centuries ago.
- Why is the tree standing in the middle of a road?
- The tree was here first. When Haramachi was planned in the seventeenth century, the streets were set out around the existing zelkova, and as those streets later became prefectural roads the junction simply formed around it. The road did not displace the tree; the tree shaped the road.
- Is it safe to walk up to the tree?
- Yes, but with care. The tree occupies a central island surrounded by working traffic. Cross at the pedestrian signals and view it from the safety zone or the surrounding pavements rather than stepping into the roadway.
- Why does the tree look so worn?
- It is in old age and has been declining since the 1960s, partly because its island position leaves no room for roots. Many limbs have been lost and the trunk is hollow. It is now braced with steel supports and survives through a root growing inside the cavity.
- What is a zelkova, and why was this one important?
- The zelkova is a tall deciduous tree of the elm family, long prized in Japan as a timber. The Haramachi tree was once counted among the three largest zelkovas in the country, which is why it was registered as a National Natural Monument in 1933.
Basic Information
| Name | The Great Zelkova of Haramachi (Haramachi no Okeyaki) |
|---|---|
| Location | 391 Haramachi, Higashiagatsuma Town, Agatsuma District, Gunma Prefecture |
| Designation | National Natural Monument, designated 13 April 1933 |
| Species | Zelkova (Zelkova serrata), elm family |
| Estimated age | About 1,000 years |
| Size | Approx. 17 m tall; trunk circumference approx. 9.1 m at chest height |
| Managing body | Higashiagatsuma Town |
| Access | About 10 minutes on foot from Gunma-Haramachi Station, JR Agatsuma Line |
| Viewing | Open-air site, viewable freely at any time; no admission fee |
References
- Database of National Cultural Properties, Agency for Cultural Affairs
- https://kunishitei.bunka.go.jp/bsys/maindetails/401/537
- Cultural Heritage Online, National Institute of Informatics
- https://bunka.nii.ac.jp/heritages/detail/190332
- Haramachi no Okeyaki, Gunma Prefecture Greening Promotion Committee
- https://www.g-sinrin.jp/kyozyukoboku/原町の大ケヤキ/
- Haramachi no Okeyaki, Wikipedia (Japanese)
- https://ja.wikipedia.org/wiki/原町の大ケヤキ
Last verified: 2026.05.22