Tsunagigaya of Ryogenan: A Living Legend Among Niigata's Ancient Trees
Deep in the tranquil countryside of Tagami Town in Niigata Prefecture, a remarkable tree has stood for over 700 years within the grounds of Ryogenji Temple. Known as the Tsunagigaya (literally "linked kaya"), this ancient Japanese torreya tree (Torreya nucifera) is one of the most botanically curious natural monuments in Japan. Designated as a National Natural Monument in 1922, it is celebrated as one of the fabled Seven Wonders of Echigo — a collection of miraculous legends associated with the revered Buddhist monk Shinran Shonin.
For international visitors seeking an experience far removed from the bustling tourist trails, the Tsunagigaya offers a rare opportunity to encounter living folklore, remarkable natural history, and the deep spiritual traditions of rural Niigata in a single, unforgettable visit.
What Is Tsunagigaya?
The Tsunagigaya is an exceptionally old specimen of the Japanese torreya, an evergreen coniferous tree belonging to the yew family (Taxaceae). While the tree itself stands only about 5 meters tall, its main trunk — with a circumference of approximately 1 meter — sends out branches that spread outward in all directions from near the base, covering an area of roughly 130 square meters. The effect is strikingly dramatic: a low, sprawling canopy of dense, dark-green needles that seems to embrace the earth around it.
What makes this particular tree so extraordinary is a botanical anomaly in its foliage. In certain years, the leaves on newly grown branches emerge with their upper and lower surfaces completely reversed. These reversed leaves are visibly lighter in color, creating a striking visual contrast on the tree. Because all the leaves from a given year share the same orientation, the pattern alternates clearly from one year's growth to the next, producing a distinctive striped appearance along the branches. This phenomenon gives the tree its alternative name, "Otegaeshi no Kaya" (the hand-turning kaya), and has fascinated botanists and visitors alike for centuries.
The Legend of Shinran Shonin and the Seven Wonders of Echigo
The story behind the Tsunagigaya is deeply entwined with one of the most important figures in Japanese Buddhism — Shinran Shonin (1173–1262), the founder of Jodo Shinshu (True Pure Land Buddhism). In 1207, Shinran was exiled to the province of Echigo (present-day Niigata) as punishment for his advocacy of the exclusive nembutsu practice. During his roughly seven years in exile, he traveled throughout the region, preaching and converting local communities to his teachings.
According to local legend, when Shinran visited the area around Gomado Mountain, the local lord invited him to deliver a sermon. As a gesture of hospitality, the lord presented Shinran with kaya nuts that had been strung together on a thread by local farmers as a form of tribute payment. Shinran planted these threaded nuts in the ground, and miraculously, they sprouted the following year. Even more astonishing, the fruit of the resulting tree bore holes where the thread had passed through, and its branches displayed leaves with alternating front and back orientations — a wonder that amazed all who beheld it.
This tale is one of the Echigo Nanafushigi (Seven Wonders of Echigo), a group of miraculous legends connected to Shinran's time in the region. Other wonders include the Sakasadake (upside-down bamboo) in Niigata City, the Yakibuna (scorched crucian carp), and the Juzukake Zakura (rosary-hanging cherry) in Agano City. Together, these wonders form a fascinating pilgrimage route for those interested in the intersection of Buddhist history and natural curiosities in Niigata Prefecture.
Why Was It Designated as a Natural Monument?
The Tsunagigaya at Ryogenji Temple was designated as a National Natural Monument on October 12, 1922 (Taisho 11), under the historic sites, scenic beauty, and natural monuments protection system. The official designation recognizes it as a botanical rarity — a variety of Japanese torreya classified as Torreya nucifera var. articulata, characterized by the periodic reversal of leaf surfaces on new growth.
From a scientific perspective, the leaf-reversal phenomenon is a form of teratology (the study of biological anomalies), making this tree a genuinely rare specimen in the world of botany. The original tree is believed to have been transplanted from a wild habitat near the summit of nearby Gomado Mountain, where a separate colony of Tsunagigaya once grew. That habitat is also designated as a National Natural Monument under the name "Tagami Village Tsunagigaya Habitat," though the original old-growth specimens there have unfortunately been lost to heavy snowfall over time.
The combination of its extreme age (estimated at over 700 years, with some traditions claiming nearly 800 years), its unique botanical characteristics, and its deep cultural and religious significance made the Tsunagigaya a natural choice for one of Japan's earliest natural monument designations.
Highlights and What to See
The primary attraction is, of course, the Tsunagigaya itself. Visitors can observe the tree up close within the temple grounds and examine the distinctive leaf patterns that have mystified observers for centuries. During autumn, the tree produces its characteristic kaya nuts — visitors who are fortunate may be offered one by the temple's kind residents as a good-luck charm.
Ryogenji Temple itself is a modest but atmospheric site. It belongs to the Otani branch of Jodo Shinshu Buddhism, with Amida Nyorai (Amitabha Buddha) as its principal object of worship. The temple also houses a statue of Shinran Shonin, acknowledging the deep historical connection between the monk and this site. A mature crape myrtle (sarusuberi) tree within the grounds adds seasonal color, particularly during the summer months.
The temple's resident clergy are known for their warm hospitality toward visitors and will often share the legend of the Tsunagigaya in detail. Although the explanation is typically given in Japanese, the kindness and enthusiasm of the storytelling transcends language barriers. Goshuin (temple seal stamps) are available for 300 yen for those who collect them.
Nearby Attractions and Surrounding Area
Tagami Town offers a wealth of attractions that pair beautifully with a visit to the Tsunagigaya, making it easy to spend a full and rewarding day in the area.
Gomado Mountain (274 meters) is a popular hiking destination directly adjacent to the temple area. The trail to the summit takes approximately 40 minutes and is suitable for beginners. At the top, visitors are rewarded with panoramic views of the Echigo Plain, Yahiko Mountain, and on clear days, even Sado Island. From mid-June to mid-July, the summit hosts a spectacular hydrangea garden with approximately 30,000 plants in bloom — one of the region's most beloved seasonal events.
Yudagami Onsen, a historic hot spring resort nestled on the slopes of Gomado Mountain, has been welcoming visitors since 1738. Known locally as "Yakushi no Yu" (the Healer's Bath), its sodium-chloride waters are prized for their therapeutic properties. Several traditional inns offer day-trip bathing options, making it a perfect complement to a morning of cultural exploration.
Other notable sites in the area include Chinjuso, a magnificent former estate of the wealthy Tamaki (Haradamaki) landholding family, now open to the public as a museum of Meiji-era architecture and craftsmanship, and Toryuji Temple, a Soto Zen temple offering zazen (seated meditation) experiences for visitors.
The recently opened Michi no Eki Tagami (Tagami Roadside Station) on Route 403 provides a convenient rest stop with local produce, crafts, and information about the town's attractions.
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Q&A
- Is there an admission fee to see the Tsunagigaya?
- There is no admission fee to visit Ryogenji Temple and view the Tsunagigaya. The temple grounds are freely accessible. Goshuin (temple seal stamps) are available for 300 yen. The temple is typically open for visits during the afternoon hours (approximately 13:00–17:00).
- How do I get to Ryogenji Temple from Tokyo?
- From Tokyo, take the Joetsu Shinkansen to Tsubamesanjo Station (approximately 2 hours). From there, transfer to the JR Shinetsu Main Line and ride to Tagami Station (about 15 minutes). The temple is approximately a 15-minute walk or a 5-minute drive from Tagami Station. Alternatively, if arriving by car, take the Ban-Etsu Expressway to Niitsu IC (about 30 minutes from the temple) or the Hokuriku Expressway to Sanjo-Tsubame IC (about 30 minutes from the temple).
- What is the best season to visit?
- The tree can be visited year-round, as the Japanese torreya is an evergreen species. However, autumn is particularly rewarding, as the kaya nuts ripen during this season. If you wish to combine your visit with the Gomado Mountain hydrangea festival, plan for late June to mid-July. The area is also delightful in spring when bamboo shoot cuisine is featured at local restaurants and onsen inns.
- Is the site accessible for visitors with limited mobility?
- Ryogenji Temple is located on relatively flat ground and the Tsunagigaya can be viewed without climbing stairs, though the approach path is unpaved in places. There is a small parking area for about 6 vehicles. Visitors with mobility concerns should note that the parking lot is situated a short distance from the temple building.
- Are there English-language signs or guides available at the site?
- Signage at the temple is primarily in Japanese. English-language information is limited, so it is recommended to research the background of the Tsunagigaya before your visit. The temple's residents are welcoming and may share the legend of the tree, though typically in Japanese. Bringing a translation app on your phone can be helpful for communication.
Basic Information
| Official Name | 了玄庵のツナギガヤ (Tsunagigaya of Ryogenan) |
|---|---|
| Designation | National Natural Monument (designated October 12, 1922) |
| Species | Japanese Torreya (Torreya nucifera var. articulata) |
| Estimated Age | Over 700 years (some traditions claim approximately 790 years) |
| Location | Ryogenji Temple, 1285-1 Tagami-hei, Tagami Town, Minamikanbara District, Niigata Prefecture 959-1502 |
| Access | Approximately 15 minutes on foot or 5 minutes by car from JR Tagami Station (Shinetsu Main Line) |
| Parking | Available (approximately 6 spaces) |
| Admission | Free |
| Contact | Ryogenji Temple: 0256-57-3422 (13:00–17:00) / Tagami Town Tourism Association: 0256-57-6225 |
References
- 了玄庵のツナギガヤ — 文化遺産オンライン
- https://bunka.nii.ac.jp/heritages/detail/138307
- 了玄寺とつなぎがや — 新潟県田上町
- https://www.town.tagami.niigata.jp/kankou/docs/8824.html
- 越後七不思議 — Wikipedia
- https://ja.wikipedia.org/wiki/越後七不思議
- 国指定文化財天然記念物 「了玄寺の繋ぎ榧」 — 東京新潟県人会ウェブ広報
- https://kouhou.niigatakenjinkai.com/?p=7515
- 発見！TAGAMI DEEP LOCAL 田上町 — 田上町観光協会
- http://e-tagami.jp/deep-tagami/
- Torreya nucifera — Wikipedia (English)
- https://en.wikipedia.org/wiki/Torreya_nucifera
- 了玄寺のツナギガヤ — JAPAN 47 GO
- https://www.japan47go.travel/ja/detail/ec89c503-4b18-489f-8c80-f50347800850
Last verified: 2026.03.07