The Great Zelkova of Takase: A 500-Year-Old Living Witness on the Ruins of a Phantom Castle
In the western outskirts of Aizuwakamatsu City in Fukushima Prefecture, where rice paddies stretch in every direction across the Aizu Basin, a single colossal tree rises from the open plain like a green island. This is the Great Zelkova of Takase, known in Japanese as Takase no Taiboku, a living monument that was already a giant when the warlord Uesugi Kagekatsu chose this very ground to build a castle in the year 1600. The tree was designated a National Natural Monument by the Japanese government in January 1941, and it remains one of the largest and most historically resonant zelkova trees in all of Japan.
For visitors who travel beyond the famous Tsuruga Castle in central Aizuwakamatsu, this great tree offers a quiet but profound encounter. Its massive trunk, hollowed by the centuries, still supports a sweeping crown of branches that has watched over five hundred springs, summers, autumns, and winters in the heart of the Aizu countryside.
Standing on the Ruins of Kozashi Castle: A Phantom from the Sengoku Era
To understand why this tree matters so deeply, one must understand the place where it stands. The Great Zelkova of Takase rises from the northeastern earthwork of the ruins of Kozashi Castle, a fortress whose story is inseparable from one of the most pivotal moments in Japanese history.
In February of 1600, the Aizu lord Uesugi Kagekatsu ordered his celebrated chief retainer Naoe Kanetsugu to begin construction of a new castle on the Kozashi Plain. The existing Wakamatsu Castle, inherited from the previous lord Gamo Ujisato, was considered too cramped for the Uesugi clan's vast 1.2-million-koku domain. The new castle was designed on a colossal scale: roughly 55 hectares in total, nearly twice the size of Wakamatsu Castle, with a planned inner bailey of approximately 180 by 306 meters.
An astonishing workforce of around 120,000 laborers from Echigo, Sendo, Yonezawa, and the four districts of Aizu was mobilized for the project. Stone walls for the inner bailey were built between March and June, and the second bailey took shape through May. Yet the construction was abruptly halted in June. Tokugawa Ieyasu, who would soon become Japan's supreme ruler, viewed the rapid fortification as a sign of rebellion. His decision to march on Aizu set in motion the chain of events leading to the Battle of Sekigahara that same autumn. Kozashi Castle was never finished. It became a phantom castle, abandoned in mid-construction.
The Great Zelkova, however, was already standing at the site long before the laborers arrived. When the Uesugi engineers designed the second bailey, they shaped its northeastern corner around this enormous tree, which sat in the position traditionally regarded as the kimon, or demon's gate, in Japanese geomancy. More than four centuries later, the earthworks have largely returned to fields and farmland, yet the tree still stands sentinel at the corner where the castle wall once turned.
Why It Was Designated a National Natural Monument
The Great Zelkova of Takase was designated a National Natural Monument on January 27, 1941, under Japan's prewar law for the protection of historic sites, places of scenic beauty, and natural monuments. The original designation document records its dimensions and significance in formal classical Japanese, citing a root circumference of 12.55 meters, a trunk circumference at chest height of 10.45 meters, an estimated age of approximately 500 years, and exceptional vigor that placed it among the most outstanding zelkova specimens in the country.
Three qualities earned this tree its national status. The first is sheer size. Even today, environmental surveys place its trunk circumference among the top zelkovas nationwide. The second is its great age, with an estimated lifespan now reaching toward the upper limits of what the species can attain. The third is its historical context. Few ancient trees in Japan stand on a site so directly connected to the politics of the Sengoku period, the Battle of Sekigahara, and the founding of the Tokugawa shogunate. Tree, soil, and history are inseparable here.
The Highlights of Visiting the Tree
The Sheer Mass of the Trunk
The first impression of the Great Zelkova is one of overwhelming volume. The massive trunk has the presence of a small fortress in itself, with deeply furrowed bark and gnarled buttresses sprawling out at the base. The interior of the trunk is hollow, a natural development in many ancient zelkovas, yet the outer wood remains alive and continues to push fresh branches skyward each year.
The Supporting Structure
Over the centuries, the tree has lost several of its great limbs to their own weight, and cracks have appeared in the upper trunk. To preserve this national treasure, wooden ladder-like supports have been installed to brace key branches. These quiet engineering touches are part of what makes the tree feel cared for, a heritage actively held in trust by the local community.
The Setting in the Open Plain
Unlike many famous old trees that stand within shrine or temple precincts, this zelkova rises alone in farmland. From a distance the silhouette dominates the Aizu Basin, particularly striking when seen across rice paddies in early summer or against the snow-covered fields of winter. Cherry trees have been planted around the site, and in mid-spring their pink blossoms frame the towering green canopy in a memorable seasonal scene.
Walking the Castle Earthworks
From the tree, visitors can follow signs to other surviving features of Kozashi Castle. Sections of the earthen ramparts and the foundation of the inner bailey can still be traced through the landscape. Although much of the central area is private property, interpretive panels guide walkers through the ruins, allowing imagination to fill in the great keep that was never built.
Around the Site: Things to See Nearby
The Great Zelkova is on the western edge of Aizuwakamatsu, a city deeply layered with samurai history and traditional crafts. Within easy reach are sites that complement the visit and turn it into a full day of exploration.
About four to five kilometers to the east stands Tsuruga Castle, the iconic white-walled fortress that became the last bastion of the Aizu domain in the Boshin War of 1868. Its reconstructed keep, red-tiled roof, and museum offer a vivid counterpoint to the unfinished castle at Kozashi. Nearby, the Iimoriyama hillside preserves the graves of the Byakkotai, the young samurai who took their own lives believing the castle had fallen. About one kilometer east of the zelkova lies the monument to Nakano Takeko, the naginata-wielding warrior woman who fell during the same conflict. Aizuwakamatsu also offers historic sake breweries, lacquerware workshops, and the seventeenth-century Oyakuen medicinal herb garden. For onsen lovers, the hot springs of Higashiyama and Ashinomaki are within a short drive.
- 📍 Plan Your Visit to Fukushima
- Find tours, activities & transport passes near Takase's Big Tree (Zelkova)
- [ Aizu-Wakamatsu Castle & Ouchi-juku Village Tours ]
Q&A
- How old is the Great Zelkova of Takase?
- The tree is estimated to be approximately 500 years old. This means it had already grown into a substantial tree well before Uesugi Kagekatsu began constructing Kozashi Castle around it in the year 1600.
- Is there an admission fee to see the tree?
- No, the tree stands in an open landscape on land managed by Aizuwakamatsu City and is freely accessible at any time of day. Please remain on the paths and respect the surrounding farmland.
- When is the best season to visit?
- Each season offers a distinct atmosphere. Late April brings cherry blossoms around the site, early summer fills the surrounding rice paddies with vibrant green, autumn turns the leaves a rich golden hue, and winter offers a stark snow-covered scene with the bare framework of the tree fully visible.
- How is the tree connected to the Battle of Sekigahara?
- The tree stands on the earthwork of Kozashi Castle, whose construction by Uesugi Kagekatsu and Naoe Kanetsugu was used by Tokugawa Ieyasu as a pretext to launch the Aizu campaign of 1600. That campaign in turn opened the way for Ishida Mitsunari's uprising and the decisive Battle of Sekigahara.
- How do I reach the site from central Aizuwakamatsu?
- By car it is about 15 to 20 minutes from JR Aizuwakamatsu Station. By bus, take a Bandai Toto Bus bound for Bange and alight at the Takase stop, then walk for several minutes through the surrounding farm roads. Buses run only one or two times per hour, so checking the timetable in advance is recommended.
Basic Information
| Name | The Great Zelkova of Takase (Takase no Taiboku) |
|---|---|
| Tree Species | Japanese Zelkova (Zelkova serrata) |
| Designation | National Natural Monument (designated January 27, 1941) |
| Estimated Age | Approximately 500 years |
| Trunk Circumference (at root base) | 12.55 meters |
| Trunk Circumference (at chest height) | 10.45 meters |
| Tree Height | Approximately 24.6 meters (per Aizuwakamatsu City; the original 1941 designation recorded approximately 16 meters) |
| Location | 1624 Iyochi, Takase, Kozashi-machi, Aizuwakamatsu City, Fukushima Prefecture |
| Managing Body | Aizuwakamatsu City |
| Setting | Northeastern earthwork of the ruins of Kozashi Castle (1600) |
| Access | Approximately 15 to 20 minutes by car from JR Aizuwakamatsu Station; or by Bandai Toto Bus to Takase stop |
| Admission | Free; viewable year-round |
References
- Cultural Heritage Online (Agency for Cultural Affairs): The Great Zelkova of Takase
- https://bunka.nii.ac.jp/heritages/detail/215909
- National Designated Cultural Properties Database (Agency for Cultural Affairs)
- https://kunishitei.bunka.go.jp/bsys/maindetails/401/369
- Aizuwakamatsu City: Historic Sites of Aizuwakamatsu — The Great Zelkova of Takase
- https://www.city.aizuwakamatsu.fukushima.jp/docs/2012110900031/
- Aizu Tourist Information Bureau: Kozashi Castle Ruins
- https://www.aizukanko.com/spot/147
- Fukushima Travel Information: The Great Zelkova of Takase
- https://www.tif.ne.jp/jp/entry/article.html?spot=1009
- Wikipedia (Japanese): Kozashi Castle
- https://ja.wikipedia.org/wiki/%E7%A5%9E%E6%8C%87%E5%9F%8E
Last verified: 2026.05.06