Sacred Japan

Last updated: September 2026

The white torii at the entrance to Oiwa Shrine.

Oiwa Shrine sits in the mountains of Hitachi, Ibaraki Prefecture. Pass through the torii, and the scenery shifts completely from anything you’d find at an ordinary neighborhood shrine.

Tall cedars rise overhead. Moss covers the ground. The approach path follows the contour of the mountainside. Walking it feels less like heading toward a shrine hall and more like stepping directly into the forest itself.

What makes Oiwa Shrine distinctive isn’t simply its age. Across the entirety of Mount Oiwa, 188 deities are said to be enshrined, and the grounds still carry traces of a long relationship with Buddhism. Layered on top of all that are legends of tengu, a massive three-trunked cedar tree, a history of Shinto–Buddhist fusion, and even a modern urban legend or two.

Oiwa Shrine is best understood not as a single shrine to look at, but as a mountain that people have sensed something special about for thousands of years — one you walk through.

Quick Facts

Location

752 Irishima-cho, Hitachi, Ibaraki

Character

Mount Oiwa worshipped as a sacred mountain; 188 enshrined deities; ancient ritual practice; Shinto–Buddhist syncretism; a massive three-trunked cedar; a climbing trail into the mountain

Shrine hours

6:00 AM–5:00 PM (per current official information)

Climbing Mount Oiwa

6:00 AM–3:00 PM; visitors are asked to stay on the designated trail

Time needed

40 minutes–1 hour for the main grounds; allow more time if climbing the mountain

Access

Reachable by public transit, though a car makes getting around easier in this mountainous area

Parking

Available

Who This Guide Is For

• Anyone who loves a shrine set deep in a forest
• Travelers interested in ancient, pre-institutional belief
• Anyone curious to feel the relationship between Shinto and Buddhism firsthand
• Travelers looking for something deeper than the standard tourist circuit
• Anyone who enjoys mysterious legends and folklore
• Visitors who want to experience a shrine as inseparable from its mountain and forest

This isn’t the kind of destination built around one impressive building. Here, the real appeal is the process itself — passing through the torii, walking among the trees, and moving through one sacred space after another.

Why This Shrine Is Special

Understanding Oiwa Shrine means not treating the shrine as separate from what surrounds it. Mount Oiwa itself is the center of everything here.

According to the shrine’s official history, the exact founding date is unknown — but ritual remains from the late Jomon period have been excavated on the mountain, and the Hitachi no Kuni Fudoki, an 8th-century regional record, describes a kami residing at the peak known by the old name "Kabire." In other words, belief in this place likely predates the shrine architecture that exists today by a wide margin.

Over the centuries that followed, mountain worship, Shinto, and Buddhism layered on top of one another, gradually shaping this into a distinctive sacred site. What you find at Oiwa Shrine isn’t something that can be explained by a single era, a single religion, or a single deity — it’s a layered accumulation of belief.

188 Deities

One number comes up again and again in connection with Oiwa Shrine: 188.

Across the whole of Mount Oiwa, 188 deities are said to be enshrined. That doesn’t mean 188 kami are lined up within a single shrine hall — the number reflects the many shrines, smaller sites, and long-standing objects of worship scattered across the grounds and the mountain as a whole.

Rather than focusing on any single deity, it makes more sense here to think of it as an entire mountain built up, layer by layer, out of many overlapping traditions of belief. That layering is what sets Oiwa Shrine apart from other shrines.

It Begins the Moment You Pass Through the Torii

The approach continues deep into the cedar forest.

Pass through the first white torii, and the approach path leads straight into deep forest. No large building appears right in front of you.

Cedars line both sides of the gravel path; moss and ferns spread across the ground. Bit by bit, signs of human construction thin out as the forest takes over.

This gradual shift matters a great deal at Oiwa Shrine. Visitors don’t simply "arrive" at a shrine — they experience a slow entry into the mountain’s sacred territory.

Sansugi: The First Place Worth Pausing

Sansugi, the shrine’s three-trunked sacred cedar.

Further along the approach stands the shrine’s sacred tree, known as Sansugi — "Three Cedars." Its trunk splits into three separate stems a few meters above the ground, and it’s designated a prefectural natural monument.

Long before you understand any of the folklore attached to it, there’s something to notice here directly: Japan has long regarded massive trees, rocks, mountains, and waterfalls as more than ordinary natural features. At Oiwa Shrine, you can sense that instinct just by standing in front of the tree, before any explanation is needed. In person, its scale — thicker and taller than any photograph really conveys — makes an immediate impression.

And Sansugi has a second side to it.

The Legend of the Tengu

According to local folklore, a tengu once lived in the split where the three trunks meet — said to have played tricks on visitors. A related belief holds that taking branches or leaves from the sacred tree without permission can bring bad luck.

None of this is meant to be verified as historical fact. But it offers a window into something real: a way of regarding massive old trees and mountains not simply as nature, but as something set apart from the human world, worthy of a certain wariness and respect.

Romon Gate: A Boundary Appearing in the Forest

The vermilion Romon gate appears among the trees.

Continue on, and a vermilion Romon gate comes into view — a deep red structure standing out sharply against the surrounding green, marking a real shift from the natural scenery that came before.

Passing through it feels like moving from a forested approach into a more clearly defined space of worship.

Even so, the forest doesn’t end at the gate. Massive cedars continue to rise up behind the buildings beyond it — architecture and forest never fully separate here, and that overlap is part of what defines Oiwa Shrine.

Buddhism Still Present Within a Shrine

Buddhist traces remain within Oiwa Shrine’s sacred landscape.

Walking through Oiwa Shrine, you’ll notice something unusual: traces of Buddhist practice within what is, institutionally, a Shinto shrine.

This is a remnant of shinbutsu-shugo — the long historical blending of Shinto and Buddhist belief in Japan. Oiwa Shrine developed as a distinctive sacred site where ancient mountain worship, Shinto, and Buddhism overlapped over centuries.

Here, the modern assumption that "a shrine and a temple are two completely separate things" doesn’t fully capture what you’re looking at — Oiwa Shrine lets you see that overlap as an actual physical space, rather than an abstract historical fact. (For more on how Shinto and Buddhist sites differ — and where they overlap — see our companion guide, Shrine or Temple? A Simple Way to Tell the Difference.)

The Shrine Hall

Oiwa Shrine’s main worship area, surrounded by tall cedars.

Deep within the forest stands the shrine hall of Oiwa Shrine itself — a restrained wooden structure, without the flash of a large tourist temple, set naturally into the surrounding cedar forest.

The shrine’s officially listed deities include:

• Kuninotokotachi no Mikoto
• Okuninushi no Mikoto
• Izanagi no Mikoto
• Izanami no Mikoto

There’s no need to memorize all of these names. What defines Oiwa Shrine isn’t the story of any single deity — it’s the way so many deities and so much old belief have accumulated on a single mountain.

Kabire Jingu and Mount Oiwa

Further in, a path continues toward Kabire Jingu and up Mount Oiwa itself. From here, the experience shifts from a standard shrine visit into something closer to a mountain climb undertaken as an act of worship — what the shrine’s own materials describe as tohai ("pilgrimage ascent").

The official guidance asks visitors to stay on the designated trail for safety. If you plan to climb, come prepared with:

• Walking shoes suited to a trail
• Water
• A check on the weather beforehand
• Plenty of time built into your schedule

It’s safer to prepare in advance than to decide on climbing the mountain on impulse once you’re already there.

Not every visitor needs to reach the summit. The main grounds of Oiwa Shrine alone are more than enough to take in the atmosphere of this place. Still, it’s worth knowing the underlying structure here: the mountain isn’t simply standing behind the shrine — the shrine’s sacred space extends directly into it. Understanding that changes how you see Oiwa Shrine.

Legends and Mysteries at Oiwa Shrine

Beyond its ancient roots, Oiwa Shrine has picked up a number of unusual stories over time.

One of the most famous: a story claiming that an astronaut, looking down at Japan from space, spotted a pillar of light rising from the ground — and that the location turned out to be Oiwa Shrine.

It’s a widely known story, but no public record currently verifies it as fact. This guide treats it not as history, but as a modern urban legend that has come to symbolize the shrine’s mysterious reputation.

The tengu legend tied to Sansugi, by contrast, is genuine folklore passed down over generations. Even when both fall under the umbrella of "strange stories," it’s worth distinguishing old folklore from modern urban legend rather than treating them the same way.

That said, it’s not entirely a coincidence that stories like these gather around Oiwa Shrine. Ritual traces reaching back to the Jomon period. A massive cedar. Mountain worship. Shinto–Buddhist fusion. Deep forest. A place with this much history and this distinctive an environment naturally invites later generations to layer their own stories on top of it.

Natural time, religious time, and the time of human storytelling all sit stacked on top of each other, in the same place. That layering is a large part of what makes Oiwa Shrine feel mysterious.

What Does "Power Spot" Mean in Japan?

Pawā supotto is a relatively recent expression in Japanese, but the underlying instinct — sensing something special in a particular mountain, ancient tree, rock formation, or waterfall — goes back far further.

At Oiwa Shrine, that instinct is backed by ancient ritual practice, belief in Mount Oiwa itself, centuries of Shinto–Buddhist fusion, a massive sacred cedar, and folklore carried down across generations.

Whether or not you believe a place holds "special power" is a personal matter. But asking why people have treated this mountain as special across so many generations is one genuinely useful way to understand Oiwa Shrine.

Walking the Forest Itself

At Oiwa Shrine, walking the forest is part of the experience.

What tends to stick with visitors at Oiwa Shrine is, unexpectedly, the empty space — the parts with "nothing" in them.

Rows of cedar. Moss on the ground. A gravel path curving forward. Sunlight filtering through the branches. In a photograph, it might look like just that.

But this empty space matters here. Walking as a small human presence among trees that have lived for centuries is a real part of what this shrine offers. Rush straight for the shrine hall, and you’ll walk right past half of what makes Oiwa Shrine worth visiting. At Oiwa Shrine, the act of walking through the forest is itself part of the visit — not simply a means of getting somewhere else.

Rain and Overcast Days Aren’t a Bad Time to Visit

Oiwa Shrine isn’t a place that only suits clear skies.

On a rainy or overcast day, the cedar trunks deepen in color, and the moss and leaves take on a more saturated green. Thin mist sometimes lingers deep in the forest. A little bad weather doesn’t necessarily make for a wasted visit to the main grounds here.

Climbing Mount Oiwa is a different matter — the trail becomes slippery in the rain, and it’s safer not to push forward under those conditions.

How to Behave Respectfully

Oiwa Shrine is both a place people visit and a place where active worship continues today. No special etiquette needs to be memorized in advance — the basics are enough:

• Bow lightly at the torii
• Keep your voice down on the grounds
• Stay quiet in front of the shrine hall
• Stay out of restricted areas
• Don’t take wood, stone, or plants home with you

What matters more than flawless technique is keeping in mind that this is a place people care for. If you head up the mountain, remember that it calls for the mindset of entering nature, not simply strolling through a tourist site.

Goshuin and Amulets

Goshuin and omamori are available at the shrine office. Current official hours list reception from 9:00 AM to 5:00 PM, with seasonal or festival-specific goshuin sometimes available. If you’re planning to climb Mount Oiwa, it’s worth confirming reception hours beforehand.

Rather than rushing through just for a goshuin, it’s worth building in enough time to walk the forested approach as well.

For a full explanation of how goshuin work, see our companion guide, What Is a Goshuin?.

How to Visit

Oiwa Shrine is located at 752 Irishima-cho, Hitachi, Ibaraki.

By public transit: Reachable by public transit, though this isn’t a shrine you reach a few minutes after stepping off a train the way you might in an urban area. A local bus route runs from around JR Hitachi Station. If taking the bus, it’s worth checking the return schedule before you begin your visit.

By car: Parking is available on-site.

A day trip from Tokyo is possible, but Oiwa Shrine works best treated as a destination in its own right, rather than a quick stop along the way to somewhere else.

Difficulty and Climbing Mount Oiwa

The main grounds aren’t especially difficult to walk. That said, expect gravel paths, stone steps, and wet moss — conditions that can get slippery after rain.

Climbing Mount Oiwa itself is a different undertaking entirely. Treat it as a mountain trail, and come prepared with:

• Sneakers or hiking-appropriate shoes
• Water
• Clothing you can move easily in
• A check on the weather beforehand

Climbing hours are limited, so avoid starting a late-afternoon ascent. And there’s no obligation to reach the summit just because you’ve made the trip — walking the forest and the main shrine grounds alone offers plenty of what makes Oiwa Shrine worth visiting.

Best Time to Visit

Spring — Fresh greenery, with rhododendrons and other flowering plants adding to the scenery.

Summer — The forest reaches its deepest green. Shade is available, but humidity runs high — prepare for both heat and insects.

Autumn — Cooler temperatures make for comfortable walking, including on the mountain trail. Fall foliage pairs well with the cedar forest.

Winter — A quiet, atmospheric season, but plan around cold temperatures, possible snow, icy patches, and shorter daylight hours. If climbing Mount Oiwa, check conditions carefully and don’t push through if the weather looks unsafe.

Practical Notes for Foreign Visitors

• Time needed: About 40 minutes to 1 hour for the main grounds.
• Mount Oiwa: Treat climbing as a separate hike from a standard shrine visit.
• Footwear: Walking shoes recommended.
• Rain: Trails and stone steps can get slippery.
• Climbing hours: Confirm current official information before heading up.
• Trail: Stay on the designated climbing route.
• Bus travel: Check the return schedule before your visit.
• Goshuin: Confirm shrine office reception hours.
• Plants and stones: Don’t take anything from the grounds.
• Winter: Watch for snow, ice, and early sunset.
• No obligation to climb: The main grounds alone are worth the visit.
• Photography: Be mindful of other visitors and anyone in prayer.

Final Thoughts: A Place You Remember for Walking Its Forest, Not Just Seeing a Shrine

The sacred space continues through the forest and toward Mount Oiwa.

What stays with visitors after Oiwa Shrine varies from person to person. For some, it’s the 188 deities. For others, the massive Sansugi cedar. The Romon gate. Traces of Buddhism. The shrine hall itself. The tengu legend. Or perhaps that strange story about a pillar of light seen from space.

What ties all of it together, though, is the mountain and its forest.

Passing through the torii. Walking among the cedars. Looking up at the ancient tree. Passing through the gate. Approaching the shrine. And behind it all, the mountain continuing on.

A mountain that carries traces of Jomon-era ritual. Deities enshrined upon it. Buddhism woven in. Folklore born from it. And now, even a modern urban legend layered on top. All of it still exists within the same forest today.

Oiwa Shrine isn’t only "a mysterious power spot worth visiting." It’s a place to walk through the forest and ask why this mountain has been considered special by so many people, for so long.

If you visit, don’t just see the shrine hall and head home. Take the time to walk the forest itself, slowly. That’s where the shrine’s biggest appeal really lives.

Author’s Note

This guide is based on a firsthand visit to Oiwa Shrine and photographs taken on-site. Details on the shrine’s history, enshrined deities, visiting hours, Mount Oiwa, Sansugi, and the tradition of 188 deities have been cross-checked against Oiwa Shrine’s official information and public sources including Hitachi City’s tourism materials. The tengu legend associated with Sansugi is presented as folklore. The story of a "pillar of light seen from space" is clearly identified as a modern urban legend rather than verified historical fact.

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Japanese travel notes: More firsthand shrine visits and original Japanese-language articles are available on note.