Jigokudani Onsen Korakukan - A Tattoo-Friendly Hot Spring in Yudanaka Shibu, Nagano

Steam curls off the river below, and somewhere in the trees a macaque shrieks. You've been walking for thirty minutes through forest — no road, no cars, just a narrow trail cut into the mountainside — and now you're standing in front of a weathered wooden ryokan that has been here since 1864. This is the place where wild snow monkeys first discovered hot spring bathing, before the park next door was built to give them their own pool.

Korakukan sits at 850 meters in the Jigokudani valley, reachable only on foot. The outdoor mixed bath faces a river gorge and a natural geyser that shoots twenty meters into the air on the opposite bank. In winter, monkeys wander down from the ridge and sometimes slip into the water beside you. The indoor baths are small and wood-lined, the rooms are tatami and futon, and dinner arrives as mountain hot pot. If you want an onsen experience that feels genuinely wild — snow falling into the bath, monkeys at the edge, no cell signal — this is it.

• Bathe with Snow Monkeys: The original site where wild macaques first learned to soak in hot springs — in winter, they still wander into the outdoor bath beside you.
• Tattoos Accepted: A visitor with tattoos reports bathing in all areas — communal and outdoor — with no covers required. First-hand reports are few, so confirming directly before your visit is sensible.
• Earned by Hiking In: No road access — the thirty-minute forest trail from the parking area filters out crowds and sets the mood before you arrive.
• Staff Who Speak English: The small family-run team explains bathing etiquette and logistics in English, making a remote mountain onsen accessible to first-time visitors.

The outdoor bath hits you with scale first — open sky, river gorge, and a natural geyser erupting across the bank, close enough that spray drifts over on windy days. The water runs hot and clear with a faint mineral smell, smooth on the skin, and dark flakes of yunohana drift through it like tea leaves. Swimsuits and modesty towels are allowed in the mixed outdoor bath. Inside, the gender-separated baths are wood-lined and small — three or four people at most — with a quieter, steam-filled atmosphere. In winter, snow collects on the rocks around the outdoor bath while the temperature drops well below freezing, sharpening the contrast between cold air and hot water. If the monkeys come down from the ridge, they perch at the edge or wade in. You watch them. They ignore you.