Jigokudani Snow Monkey Park 2026: When the Macaques Bathe

Nagano · Yamanouchi · Wild Macaques

By Nobu · Updated June 2026 · Verified against the park’s official site

At Jigokudani Yaen-kōen in the Nagano mountains, wild Japanese macaques come down to soak in a hot-spring pool — about the only place on earth you can reliably watch monkeys bathe. Admission is ¥800, it’s open year-round, and whether they actually get in the water comes down to the weather, not the date: they soak most through the cold of January to March, and less on mild, sunny days. You reach them on foot — a 1.6 km forest trail that turns to sheet ice in winter.

What you’re actually seeing

This isn’t a zoo. The park is an observation site on the wild troop’s home ground, with no fences and no cages — the monkeys come and go as they please, and the official line is honest about it: they “may not show up at all on certain days,” and appearances are “particularly sporadic in the autumn.” The rest of the year they’re reliable — the troop turns up the great majority of days, and in winter and into March they tend to arrive around 9:00 and stay until closing. Before you commit to the trip, check the park’s website: it runs a live webcam and posts weekly arrival forecasts, so you can see whether the monkeys are around that morning.

Will they actually be bathing? It’s the weather, not the month

The soaking is what you’re really after, and it’s worth understanding before you go. The monkeys bathe to keep warm, so it tracks the cold rather than the calendar. January and February are the surest bet — deepest snow, longest soaks, the classic photos. The broader window runs roughly December through March; even in March it’s still cold enough that they get in often. What thins it out is a warm, bright day: when I went in late March the troop was all there, but it was mild and sunny, so they spent more time grooming and play-fighting on the rocks than sitting in the water. By April and May they’re more active and only really soak when it’s rainy or chilly (late April into May is also baby season). In high summer there’s essentially no bathing. So even on a good day, “monkeys present” doesn’t guarantee “monkeys in the bath” — go in winter, and go on a cold morning, if the soak is the whole point.

The walk in — and the ice

You don’t drive to the monkeys. From the Kanbayashi Onsen bus stop it’s about a 1.6 km forest trail to the park entrance — roughly 30 minutes each way, with the pool a few minutes further in. In summer it’s an easy walk in trainers. In winter it’s a different thing: the path packs down to deep snow and ice and gets genuinely slippery, and in places the ground drops away to the river beside you with no railing. When I went the trail was sheet ice the whole way — the move is to slow right down and watch your feet. The park recommends rubber or snow boots and simple crampons (ice cleats) in winter, and you can rent boots and crampons near the trailhead. Worth every yen. Note there’s no wheelchair or stroller access — the approaches are unpaved, uneven and have steps.

The rules that keep it wild

These are wild animals habituated to people, not pets. The park’s rules are firm, and they’re what keep the experience working:

Getting there & where to stay

Most people come from Nagano Station: the Nagaden “Snow Monkey” express bus runs from the East Exit straight to the Snow Monkey Park stop in about 40 minutes (roughly ¥2,000 one way — hourly in winter, less often otherwise; reconfirm the current timetable). The alternative is the Nagano Dentetsu railway to Yudanaka Station and a short local bus. If you’d rather stay close, the old onsen towns at the foot of the hill are lovely for a night — Yudanaka Onsen (local bus ~10 min) and historic Shibu Onsen (~5 min). We based ourselves in Nagano City and did it as a half-day out, which works fine too. There’s also a Snow Monkey Pass (around ¥4,800 adult / ¥2,400 child) bundling round-trip transport with admission — check current prices, as fares change yearly.

Good to know