Route Overview
The Iya Valley Road refers to a series of scenic mountain routes in Miyoshi City, western Tokushima Prefecture. It includes segments of National Route 32, Prefectural Route 32, Route 45, and the infamous National Route 439.
This remote area—often called one of Japan’s “last unexplored regions”—offers dramatic landscapes, including deep ravines, cliffside roads, vine bridges, and traditional mountain villages.
Recommended Riding Section
The best section starts from Ōboke Station, continuing through Iya Gorge to Oku-Iya.
The winding roads near the “Peeing Boy” statue offer breathtaking views and a thrilling ride.
Further along, you’ll encounter cultural gems like the Kazurabashi Vine Bridge and the Ochiai village—a historical hamlet nestled deep in the mountains.
Road Conditions & Safety
Road width varies; many stretches are narrow and challenging for passing.
Route 439 (“Kokudō Yokusan” or “Death Route”) is especially notorious for its tight turns, steep slopes, loose gravel, and lack of guardrails.
Passable on large motorcycles, but recommended for experienced riders only.
Note: Roads may be closed during winter due to snow and ice. Check conditions beforehand.
Recommended Stops
- Kazurabashi Vine Bridge: A suspension bridge made of mountain vines. Crossable on foot only.
- Peeing Boy Statue: A famous roadside photo spot overlooking the gorge.
- Iya Valley Viewpoint: Offers panoramic views of the deep valley.
- Ochiai Village: A preserved mountain village listed as a Traditional Building Preservation District.
Local Food
- Iya Soba: Rustic buckwheat noodles with a simple, earthy flavor.
- Dekomawashi: Skewered local vegetables and tofu grilled with miso sauce.
- Game dishes: Try local venison or wild boar at traditional inns or local diners.
Fees & Access
There are no tolls on any of the roads.
Access:
- From Takamatsu: Approx. 2 hours via Tokushima Expressway → Ikawa-Ikeda IC
- From Matsuyama: Approx. 2.5 hours via Route 33 → Route 439
Parking: Available at most sightseeing spots (some free, some paid).
Best Season & Climate
Spring and autumn are ideal for riding.
- Spring brings cherry blossoms and vibrant green.
- Autumn showcases stunning foliage throughout the gorge.
Summer is cooler than the lowlands, making it a great escape.
Winter riding is not recommended due to snow and road closures.
Touring Plan Example
One-day Iya Ride (from Tokushima City)
Tokushima → Tokushima Expressway → Ikawa-Ikeda IC → Ōboke → Peeing Boy → Kazurabashi → Ochiai Village → Iya soba lunch → Return via Ikeda
(Estimated time: 7–8 hours round trip)