Misotsuchi Icicles: Six Weeks When the Valley Freezes

Upstream of Chichibu, where the Arakawa is still narrow and cold, water seeps out of the rock all year. For most of the year it simply runs down into the river and nobody thinks about it.

For about six weeks in the middle of winter, it does not get the chance. It freezes on the way down, layer over layer, night after night, until the cliff face is a wall of ice.

These are the Misotsuchi icicles — Misotsuchi no Tsurara — and they are one of the few genuinely spectacular things you can reach from Tokyo in January.

Half of It Is Real, Half of It Is Made

This is the part that most write-ups leave out, and it is the first thing you should know.

There are two ice formations at Misotsuchi, side by side.

• The natural one is formed by spring water bubbling out of the rock and freezing as it falls. The site’s own figures put it at roughly 10 metres high and 30 metres wide.
• The larger one is deliberately made. Water is run over the cliff upstream so that it freezes into a much bigger sheet — around 25 metres high and 55 metres wide.

Neither of those facts spoils it. Ice on that scale is impressive whichever way it got there, and the made one is a piece of skilled winter work in its own right. But it is the difference between “nature did this” and “people here decided to do this every winter”, and you should be able to tell which one you are photographing.

One more honest note on the numbers. Different sources publish different measurements — you will also see the natural ice given as about 8 metres high. That is not really an error on anyone’s part: it is natural ice, and it is a different shape every year. A mild winter makes a thinner, smaller wall. Treat every published figure as an average, not a promise.

When to Go

The ice usually forms from early January to late February, and is at its best in the middle of that window.

For the 2026 season the site opened 9 January and closed 23 February, 8:30 to 17:00, with the illumination running from 10 January to 23 February: 17:00–19:00 on weekdays, 17:00–20:00 on Saturdays, Sundays and holidays.

The dates for the coming winter have not been published yet, and the site can also close early if the ice goes. Check the official announcements before you commit to a date — and be aware that in a warm winter there may be very little to see.

Lit after dark, the ice is a completely different thing from the ice at noon. If you can only do one, and you do not mind the cold, do the evening.

What It Costs

The admission is described as an environmental cooperation fee, and it goes towards maintaining the site.

• ¥300 for junior high school age and above
• ¥200 for elementary school children

Parking, in the private car parks at the campgrounds, is ¥500 for a car, ¥200 for a motorcycle, ¥1,000 for a minibus and ¥2,000 for a coach.

Please understand what that fee is. This is not a municipal attraction with a ticket office. The ice is on the ground of working campgrounds in a small mountain community, and the path, the lighting and the clearing of it are paid for by the people who live there and by the three hundred yen in your hand. Stay on the marked paths, do not climb on or break the ice, keep your voice down in the evening — the nearest houses are close — and take your rubbish out with you. Places like this stay open because visitors behave as though they will want to come back.

Getting There

The site is at 4066 Ōtaki, Chichibu City, Saitama, well up the valley beyond the town.

By public transport: from Seibu-Chichibu Station, take the Seibu Kanko bus on the Mitsumine-jinja route and get off at the Misotsuchi stop. Buses on this route are not frequent, so look up the return time before you go out, and check whether extra services are running during the icicle season.

By car: there are paid car parks at the Woodroof Oku-Chichibu Auto Campground and the Tsuchiuchi campground. This is a mountain road in midwinter. Winter tyres or chains, and a plan for what to do if it snows.

What to wear. The ice is there because the air is well below freezing, and you will be standing still looking at it, in the dark, beside a river. Proper boots with grip — the ground around the ice is ice — and more layers than you think you need. Hand warmers are not an indulgence here.

The Other Two

Misotsuchi is one of the “three great icicles of Chichibu”, and if the buses defeat you, one of the others is far easier to reach.

• Ashigakubo Icicles — Yokoze Town, and a ten-minute walk from Ashigakubo Station on the Seibu Chichibu Line. Admission ¥600 for junior high age and above, ¥400 for elementary children. If you are coming by train from Tokyo without a car, this is the practical one.
• Onouchi Icicles — Ogano Town, in a valley with a suspension bridge you can look down from. ¥500 for adults.

All three run roughly early January to late February, all three are illuminated on selected evenings, and all three depend entirely on the weather.

If You Would Rather Not Work Out the Buses

There are day tours from Tokyo that pair the icicles with Chichibu Shrine and a sake tasting, which solves the transport problem and the “what else do we do with the daylight” problem at once.

Please read the tour page carefully before booking — departure point, timings, what is included and the cancellation terms are all set by the operator and change from season to season, so check the current details rather than taking them from an article.

Practical Information

• Where: 4066 Ōtaki, Chichibu City, Saitama
• Season: usually early January to late February; best in the middle of that window
• 2026 season, for reference: 9 January – 23 February, 8:30–17:00
• Illumination, 2026: 10 January – 23 February; 17:00–19:00 weekdays, 17:00–20:00 weekends and holidays
• Cooperation fee: ¥300 junior high age and above, ¥200 elementary children
• Parking: ¥500 per car (private car parks)
• Natural ice: about 10 m high, 30 m wide
• Artificial ice: about 25 m high, 55 m wide
• Access: Seibu Kanko bus (Mitsumine-jinja route) from Seibu-Chichibu Station, alight at Misotsuchi
• Enquiries: Chichibu Tourism Association, Ōtaki branch

The Rest of the Valley

Winter is not the only reason to come up here, and the same railways serve all of it.

• Nagatoro — downstream, where the same river runs over rock that formed twenty kilometres underground
• The Paleo Express — the steam train that works this valley from March to December
• Fifty-two Seats of Happiness — Seibu’s restaurant train from Tokyo to Chichibu, which is at its best in winter

Who Is This For?

Anyone who wants one properly cold, properly beautiful thing to do in January. Anyone who would rather know that half the ice is made by hand than find out afterwards. And anyone willing to stand still in the dark, in a mountain valley, looking at frozen water lit from below — which, on the right evening, is worth the whole journey.

Note: Opening dates, hours, illumination times and fees are set each season and can change; the ice itself depends entirely on the weather. Please check the official announcements before you travel.

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