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Hiratani Valley

Publié le: 4 août 2026
Mis à jour le: 4 août 2026
mountain streamgorgewaterfallsswimmingUreshino
Hiratani Valley — representative image, not a photograph of this location

Image d'illustration — il ne s'agit pas d'une photo de ce lieu.

Hiratani Valley, in the mountains between Ureshino and Nagasaki, follows the upper Hiratani River through a narrow gorge of sculpted granite. The 3km trail passes 12 small waterfalls, pools of extraordinary clarity (visibility 4–5 meters in summer), and one section where the path has been cut directly into the cliff face at water level. The surrounding broadleaf forest filters sunlight into green-gold shafts that illuminate the water surfaces differently every hour.

Informations essentielles

Horaires d'ouverture

Open year-round (outdoor trail)

Fermé: Never closed | Trail may be impassable after heavy rain

Tarif d'entrée

Free

Meilleure saison

July–August for stream swimming | Late October for autumn foliage | Spring for wildflowers

Durée de visite

2–3 hours (full 3km trail and back)

Comment s'y rendre

Informations d'accès

Hiratani Valley, Ureshino City. 20-minute drive from Ureshino Onsen. Trailhead parking (free, 15 cars) at Hiratani Valley entrance. Trail marked throughout; hiking shoes essential.

Guide d'initié

Premium
**Swimming season:** July–August, the second and third pools (20 and 35 minutes from trailhead) are swimmable — clear water maintained at 17–19°C by spring inputs. Bring a dry bag for valuables and waterproof sandals for the pool sections. **Autumn timing:** Late October, the valley walls turn gold and the leaf fall creates surface patterns on the pools. The best light for photography: 14:00–16:00 when the sun reaches the valley floor through the narrow upper opening.

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