Karasawa Cirque: Japan's Most Famous Autumn Hike

Karasawa Cirque under the Hotaka peaks, Northern Alps, Japan — The Karasawa Cirque. Kitahotaka, Karasawadake, Okuhotaka and Maehotaka close it into one huge bowl, and from the bottom the walls press in on you.

▍ KARASAWA CIRQUE QUICK GUIDE

LOCATION

Deep inside Kamikochi, Matsumoto, Nagano Prefecture, Japan
A glacial cirque under the Hotaka peaks of the Northern Alps, 2,293 m

TYPE / POPULARITY

Out-and-back hike, hut or tent, no scrambling
Japan’s most famous autumn-color scenery; huts and campsite are packed in foliage season

GETTING THERE

Matsumoto Station → Shin-Shimashima (train, about 30 min) → Kamikochi Bus Terminal (bus, about 1 hour)
The trail starts at the bus terminal, a few minutes from Kappa Bridge

TIME NEEDED

Kamikochi to Karasawa: about 15 km one way, about 1,000 m of ascent, 6 hours at a normal pace; about 5 hours back down
We did it in 2 days: up to Karasawa and a hut night, then down

Karasawa is a glacial cirque walled in by the Hotaka peaks, at about 2,300 m. Kitahotaka, Karasawadake, Okuhotaka and Maehotaka surround it on three sides, so when you stand at the bottom of the bowl the rock is right in front of your face. For climbers, the Karasawa Cirque is the base for Mt. Okuhotaka (3,190 m, the third-highest peak in Japan). For everyone else, it is the most famous autumn-color scenery in the country. On foliage-season weekends, several hundred tents fill the floor of the bowl, and after dark they light up one by one, in what is probably the most photographed scene in Japanese mountaineering.

It looks like alpine climbing, but it needs no climbing skills. From Kamikochi, the first 10 km is a nearly flat valley path; only the last 5 km is a mountain trail with real gradient, and there is no scrambling anywhere on the way. If your legs are ready and you have a hut reservation, most people can get there.

I walked it with my son in October 2023 and spent a night at a hut in the cirque. The original plan was to finish the Omote-Ginza traverse and come around from Yarigatake, but snow on the ridge changed everything. This post covers the route in full, plus the two days we actually spent there.

Contents

What the Karasawa Cirque is

Kamikochi is the most visited mountain resort in Japan, with well over a million visitors a year, and most of them come for one view: the cirque under the Hotaka peaks, seen from Kappa Bridge. That is the south side of the Hotaka range. The Karasawa Cirque is on the other side of the same mountains. You cannot see it from Kappa Bridge; you have to walk in.

For climbers, what matters about Karasawa is where it sits. Mt. Okuhotaka is the main summit of the Hotaka range, 3,190 m, the third-highest peak in Japan and the highest in the Northern Alps. Together with Mt. Tsurugi and Mt. Tanigawa it is counted among Japan’s three great rock-climbing mountains, and among Japanese hikers it belongs, with Yarigatake and Mt. Tsurugi, to the handful of peaks that stand for the whole country after Mt. Fuji. The standard route up Okuhotaka goes straight up from Karasawa: about 2 hours up the Zaitengrat rock rib to the Shirodashi col, then another hour to the summit. Karasawa is the base for that climb.

Autumn colors and fresh snow in the Karasawa Cirque, Japan — Karasawa in autumn. Red leaves, white snow and gray rock, all in one frame.

The Hotaka peaks and their cirque seen from Kappa Bridge, Kamikochi — The Hotaka peaks and their cirque from Kappa Bridge, the most famous view in Kamikochi. The Karasawa Cirque is not this one; it lies on the far side of these mountains.

Map showing Karasawa Cirque and Kappa Bridge, Kamikochi — Karasawa and Kappa Bridge look close on the map, but the standard route follows the valley around for 15 km. Source: Google Maps

The route: 15 km, 6 hours, two very different halves

The standard route starts at Kamikochi Bus Terminal, a few minutes from Kappa Bridge (about 1,500 m), follows the Azusa River upstream past Myojinkan and Tokusawaen to Yokoo Sanso, then takes the mountain trail from Yokoo up to Karasawa (about 2,300 m). It is about 15 km one way, around 6 hours at a normal pace.

Those 15 km split into two halves of completely different character. The first, Kappa Bridge to Yokoo, is about 10 km inside the Kamikochi valley: a flat path that gains only about 100 m over the whole distance, walked at an easy pace in about 3 hours. The mountain trail starts after Yokoo: about 5 km with close to 700 m of ascent, also about 3 hours.

The route takes a long way around, but because it rises gently along the valley it is the easiest and safest way into Karasawa. There are no ropes, no scrambling, and the gradient is moderate. The only thing to watch is a rockfall zone above Hontani Bridge. A fit hiker can do it as a day trip, but I recommend a night up there: the tent lights and the sunrise are only there if you stay.

If you do not hike often, or you have a child with you like I did and are worried about doing the distance in one day, split the ascent into two: stay the first night at Tokusawaen or Yokoo Sanso and go up to Karasawa the next morning. Both places have baths and private rooms. They are not mountain huts; they are comfortable inns.

Flat trail along the Azusa River in Kamikochi toward Karasawa — First half: 10 km along the Azusa River from Kappa Bridge to Yokoo. Flat, well served, about 3 hours.

Mountain trail from Yokoo to Karasawa Cirque — Second half: after Yokoo the trail turns rougher and climbs steadily, but there are no dangerous sections. About 3 hours.

Getting there: Matsumoto to Kamikochi

Private cars are not allowed into Kamikochi. The standard way in is the train from Matsumoto Station to Shin-Shimashima (about 30 minutes), then the bus to Kamikochi Bus Terminal (about 1 hour). We took the first train at 6:30 am. In foliage season the crowds are heavy: it took two buses to clear the passengers from that one train, and we reached Kamikochi at about 8:30 am.

There are bear sightings around Kamikochi, and two or three weeks before our trip a Korean tourist had been attacked by one. The shops near the bus terminal sell bear bells; we bought one there and hung it on the pack.

How the snow changed our plan

We had not come for Karasawa in the first place. Friends had invited us on the Omote-Ginza traverse: up from Nakabusa Onsen to Mt. Tsubakuro, along the ridge to Yarigatake, then down to Kamikochi. But I had always wanted to see the autumn cirque at Karasawa and its sea of tent lights, so my son and I added a day, planning to drop from Yarigatake to Yokoo and go up to Karasawa from there.

While researching, I found that on the map the ridge runs straight from Yarigatake to Okuhotaka and does not look far. That is the core of the Yari–Hotaka traverse, and it includes the Daikiretto and several of the most notorious sections in Japan. That one can wait until my son is grown and goes on his own. We would stick to the standard route down to Yokoo.

Then the weather decided for us. Our first day on Mt. Tsubakuro was clear, but the next morning the whole ridge was under snow, and we abandoned the Omote-Ginza. We retreated to Matsumoto for a night and walked into Karasawa from Kamikochi the next day. That snowfall also shaped what we saw: a foliage-season Karasawa with fresh snow on the summits, and a twentieth of the usual number of tents.

The Omote-Ginza ridge from Mt. Tsubakuro toward Yarigatake, Northern Alps — The ridge from Mt. Tsubakuro toward Yarigatake: these 12–13 km are the heart of the Omote-Ginza traverse. Our plan had been to drop from Yarigatake, in the distance, to Yokoo and climb to Karasawa.

The ridge near Mt. Tsubakuro covered in overnight snow — Clear the day before, and no snow in the forecast. The next morning the entire ridge was white.

Map of the Yari-Hotaka traverse and the route to Karasawa — Red: the Yari–Hotaka traverse from Yarigatake to Okuhotaka, a high-risk section. Yellow: the route we had planned. In the end we walked in from Kamikochi. Source: YAMAP

First half: Kappa Bridge to Yokoo, 10 km on the flat

Kamikochi is a long, narrow valley. The entrance is at Taisho Pond in the south; the far end is Yokoo in the north, 13–14 km away. Kappa Bridge sits toward the southern end and is the center of everything: the bus terminal, restaurants, shops and hotels are all here. Beyond Kappa Bridge it is on foot only, and the deeper you go the fewer people there are. Kappa Bridge, Myojinkan, Tokusawaen and Yokoo are spaced almost exactly 3 km apart, about an hour each, and all three stops have food and lodging.

Myojinkan

Not long after the bus terminal you pass Konashidaira Campsite. Besides tent pitches it has cabins; I stayed in one once, and it was cheap, clean, had a big bath house and was close to the terminal. If you need a night in Kamikochi, it is a practical choice.

About an hour brings you to Myojinkan. It is an inn, and because it is close to Kappa Bridge and next to Myojin Pond, plenty of ordinary tourists stroll this far. On the way back, if you have time, cross the bridge to the Myojin Pond side and return to Kappa Bridge along the trail on the opposite bank of the Azusa River.

Myojinkan inn in Kamikochi — Myojinkan, about an hour from Kappa Bridge and the end of the walk for many visitors.

Myojin Pond in Kamikochi — Myojin Pond. If you are not in a hurry on the way back, cross the river here and return to Kappa Bridge along the other bank of the Azusa.

Tokusawaen

From Myojinkan to Tokusawaen the trail runs through forest, quiet and easy, and again takes about an hour. Tokusawaen is a large flat meadow with a campsite, an inn and a restaurant, the buildings are handsome, and it is the most comfortable spot on the whole route. Our friends walked this far with my son and me; they had a flight out of Tokyo early the next morning and could not come up to Karasawa. So we had an early lunch here: pizza, coffee and cola, sitting in a comfortable dining room. I had never eaten like that on a hike.

Tokusawaen inn in Kamikochi — Tokusawaen. A fine inn in a quiet setting, and because it is deeper into Kamikochi there are far fewer people.

Pizza lunch at Tokusawaen on the way to Karasawa — An early lunch at Tokusawaen. Pizza in the middle of a hike was a first. Our friends said goodbye here, and from this point it was just the two of us.

Yokoo

The trail from Tokusawaen to Yokoo was under repair, so we followed the signs along the detour on the other side of the Azusa River, again about an hour. Yokoo is the end of Kamikochi, and most day visitors stop well before it. It is also the trailhead for two routes: for Karasawa and Okuhotaka you cross Yokoo Bridge; the trail for Yarigatake starts beside Yokoo Sanso. Yokoo Sanso offers lodging and meals.

Yokoo Bridge, start of the trail to Karasawa and Okuhotaka — The trail to Karasawa and Okuhotaka begins by crossing Yokoo Bridge.

Second half: Yokoo up to Karasawa

Yokoo to Hontani Bridge

After Yokoo Bridge the first landmark is Hontani Bridge, a little over 2 km and about an hour away. The first half is a flat gravel path; after about 1 km you pass a wide riverbed and the trail turns rougher, with some ups and downs but no real climbing. It is still easy walking.

Hontani Bridge is worth a stop. Partly because the steepest section of the whole route starts right after it, and partly because the water here is clear and the mountains open up. On the way down, with no time pressure, my son and I spent a while playing in the icy stream.

Riverbed between Yokoo and Hontani Bridge on the Karasawa trail — After Yokoo the path is flat gravel at first. About 1 km on you reach this riverbed, and the trail becomes rougher.

Hontani Bridge on the trail to Karasawa Cirque — Hontani Bridge, the key landmark after Yokoo. The real climbing starts from here.

Clear stream beside Hontani Bridge — The stream at Hontani Bridge is clear and cold, a good place for a rest by the water.

Hontani Bridge to Karasawa

The last stretch is a little over 2 km with more than 500 m of ascent, the only real climb on the route, about 2 hours. There is nothing to scramble over, but there is a rockfall zone you should pass through without stopping. If you do not hike often you will feel this section, and it will take longer.

This is also where the cirque starts to close in around you. That year there was fresh snow on the summits, so the whole slope was red below and white above. We climbed toward the snow line, and the plants beside the trail were coated in frost that had not melted. Boulders, the cirque, snow overhead: an autumn you cannot see in Taiwan.

A cirque is carved by a glacier. I am not fluent in the vocabulary of glacial landforms, but the way ice cuts a mountain into a bowl this vast and this complete has always fascinated me (Taiwan has a rare one of its own on Nanhu Mountain). What ordinary visitors see from Kappa Bridge is the cirque on the south side of the Hotaka peaks. The Karasawa Cirque is on the far side of Okuhotaka, and the trail up to Karasawa is a walk straight into the bowl.

Autumn colors on the trail to Karasawa Cirque — Hiking in foliage season: comfortable, and beautiful.

The climb from Hontani Bridge to Karasawa — From Hontani Bridge it is a little over 2 km and more than 500 m of ascent to Karasawa, about 2 hours. If you do not hike often, this is the hard part.

Red autumn slopes and snow-capped peaks near Karasawa, Japan — Red slopes below, snow on the summits. An autumn mountain scene you only get at higher latitudes.

Approaching the Karasawa Cirque with the Hotaka peaks ahead — The higher we climbed, the bigger the view became.

Frost on plants at the snow line near Karasawa — The plants beside the trail were coated in frost. Karasawa sat right at the snow line that day.

The Karasawa Cirque and its two huts

Karasawa has two huts, Karasawa Hyutte and Karasawa Goya, one on each side of the bowl. The floor between them is the famous campsite, and it takes about 10 minutes to walk from one hut to the other through the tents. Karasawa Goya sits higher, so if you are continuing to Okuhotaka the next day, staying there shortens the climb a little. Karasawa Hyutte sits lower but has a large terrace facing the Hotaka peaks, and when the morning sun hits the mountains across the cirque, this is the best seat. We chose Karasawa Hyutte for that terrace.

Japanese mountain huts are far more comfortable than Taiwan’s, whether you look at the rooms, the toilets or the food. Besides dinner and breakfast there are vending machines and a small shop. Phone reception is poor, but the hut has wifi. After checking in I took my son up to the terrace. It was about 1–2°C, and the frost in the grass had not melted. I ordered him a bowl of hot udon, added a cola and a hot coffee, and we had our father-and-son afternoon tea with the whole cirque for company.

The Karasawa Cirque surrounded by the Hotaka peaks — The cirque, closed in by the Hotaka peaks.

Karasawa Hyutte and Karasawa Goya in the Karasawa Cirque — The two huts at Karasawa: Karasawa Hyutte, where we stayed, on the lower side (this side of the photo), and Karasawa Goya higher up across the cirque.

The campsite on the floor of the Karasawa Cirque — The floor of the bowl between the two huts is the famous campsite. In foliage season it is said to hold up to 600 tents.

Hot noodles on the terrace of Karasawa Hyutte — Up on the Karasawa Hyutte terrace with my son, eating hot noodles at 1–2°C.

Evening on the terrace of Karasawa Hyutte — The terrace at dusk. Cold, and not many tents, but I set up the tripod anyway for the tent lights.

Karasawa Hyutte mountain hut — Karasawa Hyutte, our hut for the night.

Our bunk space at Karasawa Hyutte — Our bunk: a small space for two.

Booking: how we did it in 2023, and how it works in 2026

When we went in 2023, both huts took reservations by phone only, and half-board (ippaku-nishoku) was ¥13,000 per person. In foliage season the phone line is very hard to get through. I first asked my credit card’s concierge whether they could book it for me; the answer was that mountain huts were outside their scope. In the end I paid someone who spoke Japanese to make the call. At the time both huts also served as emergency shelters, and hikers without a reservation were usually still taken in.

That information is now out of date. As of the two huts’ official websites in 2026 (checked September 2026): Karasawa Hyutte is now reservation-only and can be booked online through the Yamatan system with a credit card, or by phone; half-board is ¥16,000 per person and room-only ¥11,000. Karasawa Goya still takes phone reservations only; half-board is ¥16,000 per person and room-only ¥9,800, with a ¥1,000 surcharge if you arrive without a booking. Both huts are open from April 27 to November 3 in 2026. Tent pitches at the campsite need no reservation and are first come, first served on the day.

Tent lights and sunrise

In autumn, the sky over Karasawa goes dark at around 6 pm, and the tents below light up one by one. Because of the snow two days earlier, and because it was a weekday, the hut was not full and there were only 20 or 30 tents on the floor of the bowl, maybe a twentieth of the maximum, some way short of the sea of lights I had imagined. But there is no light pollution here at all, so even a faint glow stands out in the cirque, and it was still beautiful. Carrying the tripod up had been worth it.

At around 6 am the next morning, the first sunlight reached the Hotaka peaks and turned the snow a strange shade of pink. Everyone in the hut went out onto the terrace, and nobody spoke. The color lasts only about 30 minutes; once the sun is higher the light turns hard. So do not sleep in, and do not go to breakfast first.

Tent lights at dusk in the Karasawa Cirque — Dusk, and the tent lights coming on one by one.

Night view of tents in the Karasawa Cirque — If 600 tents were packed in here, it would be quite a sight.

Sunrise on the Hotaka peaks from Karasawa Hyutte — Karasawa Hyutte is the best place to watch the sunrise, as the light works its way down from the summits.

Pink alpenglow on snow-covered Hotaka peaks above Karasawa — The sun on the snow-covered summits, in an unreal pink.

Mt. Okuhotaka and Hotakadake Sanso seen from Karasawa — The summit is only 2 km away, and you can see Hotakadake Sanso, the hut on the ridge, with the naked eye. But it is 900 m higher and another 3 hours of climbing.

My son at sunrise in the Karasawa Cirque — A photo of my son. The contrast in the light is huge, and the picture still needed rescuing in post.

Morning light on the Karasawa Cirque, Japan — The dream colors last about 30 minutes. Once the sun is up the light turns hard, so do not be lazy in the morning.

Walking out, and a few observations

From Karasawa to the summit of Okuhotaka is only 2 km, and Hotakadake Sanso on the ridge is in plain sight, but those 2 km gain close to 900 m, take another 3 hours, and the terrain is far more complicated and exposed than anything below. We had planned to continue, and gave it up because of the snow. Our destination that day was a hotel in Kamikochi, so there was plenty of time, and we did not start ambling back down the way we came until after 8 am.

The Karasawa Cirque is overwhelming to look at, yet technically it is not hard to reach. With some fitness training and a sensible plan for the schedule, gear and mindset, most people have a real chance of getting there. All the way up we kept hearing Mandarin with a Taiwanese accent; Karasawa draws far more Taiwanese hikers than I had imagined. My son noticed something else: how many older hikers there are on Japanese mountains. Hiking is not a race, and they take every step steadily and keep themselves in good shape. Different nationalities, different ages, all on the same mountain.