Yudaki Falls, whose name means Hot Water Falls, drops about seventy metres over a broad slope of dark rock at the southern end of Lake Yunoko. It is about a hundred and ten metres across, which is wide for a Nikko waterfall, so the effect is of a long curtain of water rather than a single stream, and it carries away the lake's outflow toward the marsh and the lower valley. The lake itself is a high, cold highland lake, and the falls feel correspondingly wild. An observation deck near the basin lets you stand close to the base, where you can feel the spray and hear the roar of the water. It is free to visit, and it is one of the best places in Okunikko to walk, because it forms the start or end of a forest trail along the river to the Senjogahara marshland.
The best way to appreciate Yudaki is as part of a walk. From the falls, a trail follows the Yukawa River through forest and open marsh toward Senjogahara, the high plateau of wetland that is one of Nikko's best nature walks. The route is a pleasant level hike, mostly on boardwalk and forest path, and if you walk it downstream you end the day with a bus ride back from the marsh.
The tourism pages describe the route as a forest and marsh nature walk from Yudaki Falls to Senjogahara, and it is a good way to see the highland without a long climb.
At the falls themselves, the deck gives a clear view of the full width of the cascade. Mornings are best for photography, because the light falls on the rock face and the mist catches it. In autumn the surrounding trees colour early, usually in late September and October, and the falls look their best then, with red and gold framing the water.
In summer, the spray is cool and welcome. In winter, the edges of the falls and the cliff beside them freeze into ice, a spectacular sight, though the paths and the deck can be slippery, so wear shoes with good grip and check conditions before you go.
Getting here takes a while, and you should plan it. The usual route is a bus from Nikko Station or Tobu-Nikko Station toward Yumoto Onsen, which takes roughly seventy-five minutes to the Yudaki-iriguchi stop, followed by a short walk. Because the upper valley is far from the town, it makes sense to spend a full day or a night in the area.
Many visitors stay in Yumoto Onsen on the lake's northern shore, where the milky sulphur baths make a good reward after a day on foot, and the falls are an easy morning visit. If you have a car, the falls fit neatly between Senjogahara and Lake Yunoko.
Pair it with Lake Yunoko, which is the source of the water and has a one-hour walking trail around its shore, and with Senjogahara, Ryuzu Falls and Lake Chuzenji if you have a second day. Bring warm clothes even in summer, because the highland is cool, and allow time for the buses, which run less often than in the valley, especially in the colder months.
What to expect
The experience
A short walk from the bus stop to a free observation deck by the basin, with a trail on toward Senjogahara marsh for those who want a longer walk.
Best time
Late September to October for autumn colour, mornings for the light on the rock face.
How long
Half an hour at the falls, three hours or more with the walk to Senjogahara.
Tips
Wear shoes with good grip, carry warm layers even in summer, and check the last bus back before you set out.
Quick picks
- Best for
- Walkers and waterfall fans who want a quiet highland day.
- Families
- The deck is easy for children; the full trail is better for older ones.
- Couples
- A scenic start to a day of forest and marsh walking, or a morning visit from a Yumoto Onsen stay.
- Pair with
- Lake Yunoko, Senjogahara marsh, Yumoto Onsen and Ryuzu Falls.
- Time needed
- Half an hour, or half a day with the marsh walk.
Good questions
How high is Yudaki Falls?+
It drops about seventy metres and is roughly a hundred and ten metres wide, so it looks like a broad curtain rather than a narrow stream.
Is there an entry fee?+
No. The falls and the observation deck are free to visit.
How do I get there?+
A bus toward Yumoto Onsen from either Nikko station takes about seventy-five minutes to the Yudaki-iriguchi stop. A short walk leads to the falls.
Can I walk from the falls to Senjogahara?+
Yes. A forest and marsh trail follows the river from the falls toward the Senjogahara wetland and is described as a nature walk by the local tourism association.
What is it like in winter?+
Cold, and often icy. The edges of the falls can freeze, but paths and the deck may be slippery and bus services are reduced, so check conditions first.
