The Osezaki Juniper Forest: An Ancient Coastal Grove Where Time Stands Still
At the very tip of a slender cape thrusting one kilometre into Suruga Bay, an extraordinary community of trees has been quietly weathering the sea winds for more than a thousand years. The Osezaki Juniper Forest, found at the northwestern edge of the Izu Peninsula in Numazu City, Shizuoka Prefecture, is the northernmost natural grove of Chinese juniper (Juniperus chinensis) in Japan. Designated a National Natural Monument in 1932, this living museum of ancient trees combines arboreal wonder with sacred legend, mysterious waters, and unobstructed views of Mount Fuji rising across the bay.
An Otherworldly Landscape Where Trees Embrace the Sea
Stepping into the grove feels like entering a quiet conversation that began centuries before any visitor was born. Roughly 130 juniper trees twist skyward in shapes sculpted by salt winds and time, their bark spiralling, their branches reaching seaward as if listening to the waves. Some trunks measure over one metre in diameter; the largest reaches a remarkable circumference of about 6.3 metres at chest height, and certain elders are believed to be over 1,000 years old, with the most venerable estimated at around 1,500 years.
The grove encircles a small peninsula that locals call Bivajima, or "Lute Island," and surrounds an inland pond regarded as sacred. Above and through the canopy, Mount Fuji floats serenely on the horizon, framed by ancient boughs. It is a scene found nowhere else in Japan: an ageless coastal forest, a holy pond, a Shinto shrine, and the country's most iconic mountain, all gathered into a single field of view.
Why the Grove Was Designated a National Natural Monument
The Chinese juniper grows naturally along coastlines from Honshu through Kyushu and into Korea and central China, but rarely does it form a dense natural community as far north as Osezaki. The Agency for Cultural Affairs designated the site on 25 July 1932 in recognition of three intertwined values.
First, the grove represents the northernmost natural population of Chinese juniper in Japan, marking an important boundary in the species' distribution. Second, its survival as a self-perpetuating wild stand—rather than as an ornamental planting—is exceptionally rare nationwide. Juniper seedlings require strong sunlight and take two full years to germinate, with most young trees disappearing within two or three years, which makes a thriving multi-generational grove a near-miracle of natural conditions. Third, the trees here include specimens of extraordinary age and dimension, offering a unique scientific window into how junipers grow when allowed to mature undisturbed over a millennium.
The official designation describes the site simply: a representative juniper forest situated on a cape jutting from the northwestern Izu Peninsula, where many ancient trees grow and the largest reaches a chest-height circumference of approximately 6.3 metres.
Highlights Not to Miss
The Sacred Couple, or "Meoto Byakushin"
Deep within the grove stands the sacred tree of Ose Shrine, two ancient trunks fused into one and known as the Meoto Byakushin, or "Husband and Wife Juniper." Estimated to be over 1,500 years old, with a combined trunk circumference of about seven metres, this is the largest tree at the cape. According to a notice posted by the shrine, the entire grove of more than 130 trees is considered sacred, with this great pair singled out as the principal divine tree where a spirit of the deity Hiketechikara-no-Mikoto is enshrined to protect sailors and local residents.
The Mysterious Kami-ike Pond
At the heart of the grove lies one of the great mysteries of the Izu region: Kami-ike, the "Pond of the Gods." This freshwater pond, roughly 100 metres across at its longest, sits only one to two metres above sea level and as close as 15 to 20 metres from the salty bay. Even when storms drive seawater across the spit, the pond remains fresh, supporting thousands of carp, crucian carp, and catfish. One popular theory holds that underground springs from Mount Fuji, some 35 to 50 kilometres away, feed the pond, but no investigation has confirmed it—locals say the pond is too sacred to be tested. It is counted among the Seven Wonders of Izu, and visiting it requires a small offering at the shrine entrance.
Ose Shrine and Its Maritime Legacy
The grove is the sacred forest of Hiketechikara-no-Mikoto Shrine, popularly known as Ose Shrine or Ose Myojin. Tradition holds that the cape itself rose from the seabed during a great earthquake in 684 AD and that the deity Hiketechikara-no-Mikoto was enshrined here to honour the miracle. The shrine has long been revered by fishermen of Suruga Bay as a guardian of safe voyages. Inside the shrine treasury are votive paintings and model fishing boats offered over the centuries, designated as a prefectural cultural property and selected in 2006 as one of Japan's "100 Heritage Assets of Fishing Villages to Preserve for the Future."
Mount Fuji from the Cape's Edge
The tip of the cape offers one of the finest views of Mount Fuji in Japan, with the mountain rising directly across the calm waters of Suruga Bay. The site is included in the "100 Landscapes With Mount Fuji," selected to mark the 80th anniversary of Fuji-Hakone-Izu National Park.
Around the Cape: Things to Enjoy Nearby
Osezaki is famous throughout Japan as a premier scuba diving destination, with calm, clear waters and a gently shelving sandy bottom. Several dive shops and inns line the approach to the cape, and beginners can take introductory lessons here. The neighbouring Ose Beach is also listed among Japan's 100 finest swimming beaches.
For travellers wishing to extend their visit, the West Izu Walking Trail begins at Osezaki and follows the coast southward to scenic Dogashima, a route designated by the Ministry of the Environment. The wider region forms part of the Izu Peninsula UNESCO Global Geopark, and on the western slopes of the cape, layered lava flows from the ancient Osezaki Volcano can be observed in the cliff face. Each year on 4 April, the shrine hosts the Ose Festival, in which men in white face paint and women's underrobes dance aboard decorated fishing boats—often described as one of Japan's most unusual festivals.
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Q&A
- How long does it take to walk through the juniper grove and around the pond?
- A relaxed walk along the shrine path, around the sacred pond, and out to the cape's lighthouse takes about 40 to 60 minutes. The terrain is gentle and largely level, though the stone stairway to the shrine's main hall is steep, so comfortable shoes are recommended.
- Is there an entrance fee?
- The cape and beach are free to enter. To visit the sacred Kami-ike pond, which lies within the shrine precinct, a small offering of 100 yen is requested at the gate. Toll parking is available near the entrance.
- When is the best time to visit?
- The cape is beautiful in every season. Clear winter mornings offer the sharpest views of a snow-capped Mount Fuji, while late spring and autumn bring the most comfortable walking weather. Summer is peak season for swimming and diving, and 4 April is the date of the Ose Festival.
- Can visitors touch the ancient trees?
- The grove is protected as a National Natural Monument, so visitors are asked to remain on the marked paths and avoid climbing on roots or branches. The shrine welcomes quiet contemplation, and the head priest has encouraged visitors to place a hand gently on the bark of the great trees to feel the breath of their long life.
- How do I get to Osezaki?
- From JR Numazu Station, a direct bus runs to the Osezaki Misaki stop, though service is limited to a few departures per day, so checking the schedule in advance is essential. In summer, a seasonal ferry connects Numazu Port with Osezaki. Travellers with rental cars will find the cape about 70 minutes by road from Numazu.
Basic Information
| Name | The Osezaki Juniper Forest (Osezaki no Byakushin Jurin) |
|---|---|
| Designation | National Natural Monument (designated 25 July 1932) |
| Managing Body | Numazu City |
| Location | Eri, Nishiura, Numazu City, Shizuoka Prefecture |
| Species | Chinese juniper (Juniperus chinensis), family Cupressaceae |
| Number of trees | Approximately 130 trees |
| Notable features | Japan's northernmost natural juniper grove; largest tree with chest-height circumference of about 6.3 metres; ages estimated up to roughly 1,500 years |
| Access | Direct bus from JR Numazu Station to Osezaki Misaki (limited service); seasonal ferry from Numazu Port in summer |
| Admission to Kami-ike pond | 100 yen offering at the shrine entrance |
| Parking | Available (paid) |
References
- Cultural Heritage Online (National Institute of Informatics): Osezaki no Byakushin Jurin
- https://bunka.nii.ac.jp/heritages/detail/216549
- Agency for Cultural Affairs National Designated Cultural Properties Database: Osezaki no Byakushin Jurin
- https://online.bunka.go.jp/heritages/detail/216549
- Numazu City Official Website: Osezaki (Byakushin) Grove
- https://www.city.numazu.shizuoka.jp/shisei/profile/bunkazai/tennen/osezaki.htm
- Numazu Tourism Portal: The Osezaki Juniper Forest
- https://numazukanko.jp/spot/10063
- Numazu Tourism Portal: Kami-ike at Osezaki
- https://numazukanko.jp/spot/10062
- Shizuoka Cultural Property Navigator: Osezaki no Byakushin Jurin
- https://www.pref.shizuoka.jp/kankosports/bunkageijutsu/bunkazai/1002825/1041003/1041888/1004969/1020979.html
- Kanto Regional Environment Office, Ministry of the Environment: The Osezaki Juniper Forest
- https://kanto.env.go.jp/blog/2022/03/post-1171.html
Last verified: 2026.05.10