There is a National Treasure sixty metres up a rock face in Tottori that modern structural engineers still cannot fully explain, and the temple's own founding legend blames it on an ascetic who threw it there with magic. You are allowed to climb up and look at it yourself — right after someone checks your shoes.
You arrive at the reception hut in trekking shoes you were fairly sure would be fine. They are not fine. A staff member glances at your soles for about two seconds and points you toward a rack of straw sandals for sale, just in case.
Past the registration gate, the trail stops being a path and becomes something closer to a climbing route: a slope of bare tree roots you haul yourself up hand over hand, then a rock face with a thick iron chain bolted straight into the stone, then a ridge so narrow the handrail is a length of rope.
Then the trees open, and above you, tucked into a shallow hollow halfway up a sheer cliff, sits a small grey wooden hall on stilts, with no visible path, no ledge, and no obvious way anyone ever got the timber up there to build it.
Mount Mitoku has been a training ground for mountain ascetics since 706, when tradition credits its founding to En no Gyōja, the semi-legendary father of Japanese Shugendō. The story goes that he performed a ritual at the base of the mountain, then hurled a small hall containing the mountain's guardian deity up onto the cliff using nothing but spiritual power. It landed in the one spot on the entire rock face with a hollow the right shape to hold it. That is the official founding story, told in full, by an actual Buddhist temple, to this day.
Nageiredo, literally "the thrown-in hall", is now believed by architectural historians to date from the late Heian period, one of the oldest surviving examples of shrine-hall architecture in Japan, and it has been designated a National Treasure. Nobody has ever satisfactorily explained the engineering. There is no ledge wide enough for scaffolding, no trace one was ever built, and no known period technique for hoisting finished timber onto an overhang that steep. Structural engineers have priced out what scaffolding would cost there today — tens of millions of yen — and still cannot say how it was done a thousand years ago without it.
You do not view Nageiredo from a platform. You climb to it, on a registered route that starts with a root-covered slope, continues up a rock face on a fixed iron chain, crosses a stone ridge on a rope handrail, and passes a hall built directly onto a boulder before opening out at a viewing point roughly level with Nageiredo itself, across a gap you are not permitted to cross. Round trip takes 90 minutes to two hours. It is not technical, but people fall here regularly enough that the desk enforces real rules: shoes are inspected, unsuitable footwear is turned away, and climbing alone is not allowed.
If you cannot or would rather not climb, there is a legitimate alternative: a roadside viewing spot called the yōhaisho, a short walk from a car park below the mountain, where you can see Nageiredo from a distance without registering for the hike. It is a real way to visit, not a consolation prize, and it is what most Japanese visitors who come specifically for the view actually use.
The town below, Misasa Onsen, is a quiet hot-spring district recorded since the 9th century, known for unusually radioactive water that locals mention with pride rather than concern. Combine the two and you get a full day: strange religious architecture in the morning, an onsen town with almost no other foreign visitors by evening.
The thousand-year-old explanation for Nageiredo is that a holy man threw it there. The twenty-first-century explanation, after actual structural surveys, amounts to: we also don't know how they did this. It is rare for a legend and a modern engineering report to arrive at the same shrug. Usually science quietly replaces the myth. Here it just stands next to it, equally baffled, thirteen centuries apart.
- Nageiredo is generally dated to the late Heian period and is registered as a National Treasure — one of the oldest shrine-hall structures still standing in Japan.
- The pilgrimage route is genuinely regulated: solo climbers are turned away, footwear is inspected at the gate, and the trail closes after heavy rain or snow, when the rock and roots become unsafe.
- Misasa Onsen at the foot of the mountain has been a hot-spring destination since at least the 9th century and is known within Japan for the unusually high radon content of its water.
Getting there
Take the JR line to Kurayoshi Station, then a Hinomaru bus on the Misasa Line bound for Mitokusan (roughly 30–40 minutes) to the Mitokusan bus stop, from which the temple reception is a short walk. Driving from Kurayoshi takes about 30 minutes and there is parking near the entrance. Climb registration runs 8:00 a.m. to 3:00 p.m., with everyone required off the mountain by 4:30 p.m., so arrive early rather than late.