Road trips / Asia-Pacific / Japan
The valley Japan forgot to pave
A gorge in the mountains of Shikoku crossed by a bridge made of vines, a hot spring reached by cable car, and the narrowest good road in Japan — in the two weeks the maples turn.
110 kmFrom Takamatsu
2.25 hDrive time
Oct–NovBest time
2 daysIdeal trip
Also from Osaka (250 km · 3.5 h) and Kochi (85 km · 1.75 h).
Same roads. New stories.
01 · The drive
One lane, two walls, and the river below
Route 32 follows the Yoshino river into a gorge where the road and the railway take turns on each bank, and then you turn off it and the road gets narrower. From Oboke the valley road into Iya is a single lane for long stretches, with mirrors on the bends and pull-outs every few hundred metres, and the river a hundred metres down on the left. Japanese drivers manage it with a politeness that is contagious: whoever is nearer a pull-out waits.
Drive it slowly, with the window down. The point is not to arrive.
The road in from Takamatsu
- Takamatsu → Ikawa-Ikeda · expressway, 70 kmPick up the car at the airport and go. The expressway crosses the island's spine in an hour; leave it at Ikawa-Ikeda and join Route 32 south.
- Oboke gorge · the boatHalf an hour on the Yoshino between walls of folded schist — the river did in a few million years what the road is still trying to do.
- Iya Kazurabashi by 1pmUp the valley road, over the vine bridge, lunch at the soba stalls by the car park. Then the hotel and its cable car to the river bath.
- Day 2 · Ochiai, Nagoro and the double bridges, then homeEast up the valley to the hillside village, the scarecrows and the two small bridges, then back the way you came. Takamatsu by evening.
In OnRoute this is the road in from where you are — Osaka, Kochi too — with a stop for lunch and one for the light.
02 · The valley
Where the losing side went to hide
Iya is the valley the Taira fled into after losing the Genpei War in 1185, or so the legend goes, and it is easy to believe: a gorge so steep and so folded that the villages sit on hillsides a thousand metres up, reached by roads that did not exist until well into the last century. For eight hundred years the only way across the river was a bridge woven from mountain vines, built to be cut if anyone followed.
One is still there. The Iya Kazurabashi is forty-five metres of knotted hardy-kiwi vine over the river, re-woven every three years, with gaps between the planks wide enough to see the water fourteen metres below your shoes. People cross it very slowly and very quietly. Then they walk round and do it again.
03 · Why this week
Two weeks of maples, and then it is over
The maples and the beeches in the upper valley turn from the last week of October into the middle of November, and this is the week the colour comes down from the summits to the river. Days are cool and clear, nights are cold, and the hot-spring baths are at their best. Book the hotel now; the valley has a few hundred beds and every one of them knows about the maples too.
04 · Things to do
Two days in the gorge
- 09:00Oboke gorge by boat: thirty minutes between walls of folded rock, with the autumn colour above and the water green below.
- 11:00The Kazurabashi. Pay the small toll, cross, then walk two minutes to Biwa waterfall beside it, where the Taira refugees are supposed to have played the lute.
- 14:00Hotel Iya Onsen's private cable car, five minutes down the cliff to open-air baths on the riverbank. Day visitors can book the bath without the room.
- 16:00The Peeing Boy of Iya, a small bronze on a ledge above a two-hundred-metre drop on the old valley road, where local boys once dared each other to do the same.
- Day 2Ochiai, the hillside village of stone walls and thatched roofs a kilometre above the river, best seen from the viewpoint across the valley.
- Day 2Nagoro, the village of scarecrows, where one woman has made more than three hundred life-size figures to stand in for the neighbours who left; then the Oku-Iya double vine bridges, the husband and the wife, with a hand-pulled cart across the river beside them.
05 · Eat and stay
Buckwheat, miso skewers, and a bath by the river
Iya soba is the valley's own: short, thick buckwheat noodles in a clear broth, made from grain grown on the slopes because nothing else would. Order dekomawashi with it — potato, tofu and konjac on a skewer, turned over charcoal and painted with miso — from the stalls by the bridge.
Stay in the valley, not in Oboke. Hotel Iya Onsen has the cable car to the river baths; the Kazurabashi onsen hotel near the bridge has an outdoor bath with the gorge in front of it; a handful of farm stays in the upper villages take a few guests each and feed them what the garden produced. Dinner is at six and the night is silent.
06 · Know before you go
The licence, the roads, and the lift
A foreign licence is not enough to rent a car in Japan: carry an International Driving Permit under the 1949 convention, or a Japanese translation of your licence if you hold one of the few that need it. Route 439 up the valley is one of Japan's famous narrow roads — drive it only if you are happy on one lane with a drop; Route 32 and the valley road to the bridge are fine for anyone. Fill the tank in Ikawa-Ikeda or Otoyo; there are few pumps in the valley. The Mount Tsurugi chairlift runs until late November, weather permitting. Cash for the bridge toll, the boat and the soba; cards are a town thing.
A bridge built to be cut, and eight hundred years later the only thing anyone comes for.
Go and see it
OnRoute knows this place. Give it your dates and it drafts the 2 days from where you are — the road in, the stops, where to sleep — and watches fares to Takamatsu (TAK) if you are flying. One drive a week, written by OnRoute Labs, in the app.
No sponsors, no listings. Just the road.