The timetable at Shimokita Station lists it as a regular bus stop. The temple at the end of the route calls itself the gate between this world and the next, and for once nobody there is exaggerating for the brochure.
The bus climbs out of Mutsu through cedar forest for about forty minutes, and then the trees simply stop, all at once, as if someone had drawn a line across the mountain.
Ahead is a grey, pockmarked plain that smells faintly of eggs gone bad. Steam leaks out of cracks in the rock. Small towers of stones are stacked everywhere you look, and on almost every one of them a child's paper pinwheel is spinning in the wind, loudly, all at the same time.
Past the stone field the ground turns to pale sand and the sulfur smell thins out, and there is a lake the exact colour of a swimming pool lapping gently at a beach that looks, for one disorienting second, like the nicest place on the entire mountain.
Osorezan — literally "Fear Mountain" — is one of Japan's three most sacred sites, ranked for over a thousand years alongside Koyasan and Mount Hiei. Tradition credits its founding in 862 to the Tendai monk Ennin, the same wandering priest supposedly behind Yamadera in Yamagata, who is said to have been guided here by a dream telling him where Jizo, guardian of the dead, wished to be worshipped. The temple, Bodaiji, sits at the northern tip of the Shimokita Peninsula, about as far from central Tokyo as Japan's main island stretches.
The landscape does the rest of the work. This is an active geothermal caldera, and the ground around the temple is peppered with vents that Buddhist tradition has individually named as different hells — a blood pond, a hell of roaring flame, a hell of needles — bleached grey and sulphur-yellow, hissing quietly. Threaded through it is Sai no Kawara, a dry riverbed where, according to the legend told here, the souls of children who died before their parents build endless towers of stones as a kind of penance, only for demons to knock them down each night. Grieving families now do the stacking themselves, and leave pinwheels, sweets and small toys beside the stones for children who are not coming back for them.
Then, a short walk further, the same caldera produces Lake Usori, and the mood flips entirely. The lake is startlingly beautiful and almost dead: sulphuric acid seeping up from below keeps the water at roughly pH 3, pale turquoise, and largely unable to support fish. Pilgrims call the sandy shore Gokuraku — paradise — and set it directly across the crater from the hells, so that a five-minute walk here takes you from one end of the Buddhist afterlife to the other.
Twice a year, during the Grand Festival (July 20–24) and a smaller Autumn Festival on Bodaiji's grounds in early October, the mountain's other reason for existing sets up in rows of small tents: the itako, blind female mediums trained from girlhood in ascetic disciplines to perform kuchiyose, a ritual in which they channel the voice of a specific deceased person for a paying visitor. There were reportedly close to 300 practising itako in the early twentieth century; today there are said to be fewer than a dozen left, nearly all of them elderly, and the tradition — passed down through a demanding, largely informal apprenticeship — may not outlast this generation.
The detail that undercuts the whole grim picture, deliberately, is the bathing. Bodaiji maintains four small, unstaffed wooden bathhouses fed straight from the hot spring, free to anyone visiting during opening hours — no fee, no attendant, no lock on the door. You can walk past a hell named for its flames, past a beach named for paradise, and then quietly take a bath in the exact water responsible for both, which is either the strangest anticlimax on this list or the most honest thing about the whole mountain.
It is easy to arrive at Osorezan primed by the word "hell" and treat the whole place as horror tourism — a spooky day trip with a good photo of a pinwheel. Almost none of the people actually here are tourists in that sense. The stones at Sai no Kawara were stacked by a specific parent, for a specific child, this year. The queue for the itako is made of people who wrote down, on the way in, exactly what they wanted to ask someone who is gone. The mountain calls itself Fear Mountain. What it is actually built for is grief — with somewhere to put it, and a hot bath afterwards.
- Bodaiji was founded in 862, traditionally credited to the monk Ennin; Osorezan is counted among Japan's three most sacred mountains alongside Koyasan and Mount Hiei.
- Lake Usori sits at roughly pH 3 from sulphuric acid seeping through the caldera floor — pale turquoise, strikingly clear, and nearly incapable of supporting fish.
- Itako numbers have collapsed from a reported high of around 300 in the early 1900s to fewer than a dozen active mediums today, almost all of advanced age.
Getting there
From Aomori Station, take the Aoimori Railway to Noheji (about 50 min), then the JR Ominato Line to Shimokita Station (about 56 min), then a Shimokita Kotsu bus to Osorezan (about 40 min). By car it's roughly 2.5 hours from Aomori city. The temple is open 6:00 a.m.–6:00 p.m., but only from May 1 to October 31 — heavy snow closes the mountain the rest of the year, so check dates before you build a trip around it.