Kotan Onsen Lake Kussharo
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Kotan Onsen Lake Kussharo

4.4
·1k reviews·弟子屈町, Japan

Soak in a free, natural hot spring on the shores of Lake Kussharo, Hokkaido, often surrounded by graceful swans.

Highlights

Highlights

Must-see attractions

Social content

Social

From TikTok & Reddit

Best Time

Winter mornings

Best swan viewing

CrowdLow
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Kotan Onsen Lake Kussharo

Kotan Onsen Lake Kussharo

Best Time

Winter mornings

Best swan viewing

CrowdLow
Highlights

Highlights

Must-see attractions

Soak in a free, natural hot spring on the shores of Lake Kussharo, Hokkaido, often surrounded by graceful swans.

4.4
(1k reviews)

"This free public onsen offers an extraordinary lake shore view. I was so amazed by the view!"

Vertical photo
TIP

swimwear is optional :bikini:

While swimwear is allowed, many visitors opt to go nude for a more traditional onsen experience.

Check cleaning schedule 🧹

The onsen is maintained by a local gentleman and may be closed for cleaning. Plan accordingly!

Third hero image

Quick Facts

Hours

Rating

4.4 · 1,074 reviews

Type

Spa

Highlights

Discover the most iconic attractions and experiences

The Free Open-Air Onsen

The Free Open-Air Onsen

Lake Kussharo Shore

Soak in naturally heated waters with stunning lake views. A truly unique and rejuvenating experience.

Swan Congregation

Swan Congregation

Lake Kussharo Shore

Witness numerous swans gathering in the unfrozen waters, creating a picturesque and lively scene.

Lake Kussharo Views

Lake Kussharo Views

Lake Kussharo Shore

Enjoy panoramic vistas of the vast, caldera lake, especially beautiful during sunrise or sunset.

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Planning Your Visit

Embrace the Free Dip

Kotan Onsen offers a unique, free hot spring experience right on Lake Kussharo's shore. While swimwear is allowed, many opt to go without. Be aware that it's maintained by a local gentleman, and it may be closed for cleaning on certain days.

Timing is Key for Swans & Solitude

Visit during colder months for the best chance to see swans congregating due to the unfrozen water. Weekdays and early mornings are ideal for a more private experience, as it can get busier with visitors.

Best Times

When
Winter mornings
Why
Best swan viewing
Crowd
Low
When
Weekday mornings
Why
Fewer crowds, peaceful soak
Crowd
Low
When
Late afternoon
Why
Golden hour views
Crowd
Medium

Insider Tips

from TikTok, Instagram & Reddit

♨️ Kotan Onsen : Open-Air Bath Hotspring 📍 Lake Kussharo , Hokkaido 📱 All shots by Iphone15 #hokkaido #LakeKussharo #AkannationalPark
suparuj
733 likes • 23.2K views

swimwear is optional :bikini:

While swimwear is allowed, many visitors opt to go nude for a more traditional onsen experience. Instagram

Check cleaning schedule 🧹

The onsen is maintained by a local gentleman and may be closed for cleaning. Plan accordingly! Reddit

Taking a break at the open air onsen Kotan-no yu ♨️ This unique Onsen is located up in Hokkaido, Japan and sits right at the edge of Lake Kussharo where a volcano once erupted. Oh and did we mention it’s free to take a dip 😊 . #onsen #japanonsen #kotanonsen #kotannoyu #visithokkaido #visitjapan #温泉 #beautifuldestinations #voyaged
chopsticksontheloose
1K likes • 13.8K views
• 𝘌𝘹𝘱𝘦𝘳𝘪𝘦𝘯𝘤𝘦 𝘴𝘶𝘯𝘴𝘦𝘵 𝘢𝘵 𝘒𝘰𝘵𝘢𝘯𝘯𝘰𝘺𝘶 𝗞𝗼𝘁𝗮𝗻 𝗻𝗼 𝗬𝘂 : “𝗪𝗵𝗲𝗿𝗲 𝗛𝗼𝘁 𝗦𝗽𝗿𝗶𝗻𝗴 𝗠𝗲𝗲𝘁𝘀 𝗡𝗮𝘁𝘂𝗿𝗲” Along the shores of Lake Kussharo, you will find several open-air hot springs where you can bathe for free. Among these hidden gems, “Kotan no Yu (Kotan hot spring)” is particularly famous. This secluded hot spring has been featured in many media outlets for its breathtaking views: at sunset, the lake surface glows gol...
wanderfulanya
511 likes • 24.5K views

Bring your own towel :towel:

Towels are not provided, so remember to bring one for after your soak. TikTok

Jump in the lake! 🌊

After warming up in the onsen, take a refreshing dip in the cold lake waters. Reddit

Onsen with swan | Save this post for your next Japan trip! 行ってみたいと思ったらぜひ保存してね! 道東旅 Eastern Hokkaido Trip pt.3 Kotan Onsen, located on the shore of Lake Kussharo, has an open-air bath that can be entered for free. Because of the hot spring, this area is the only one on the lake that does not freeze. So many swans congregate here, it's like taking a mixed bath! Don’t miss ▷ Particularly beautifu...
akiratrip_
182 likes • 5.7K views

Tips

from all over the internet

swimwear is optional :bikini:

While swimwear is allowed, many visitors opt to go nude for a more traditional onsen experience. Instagram

Check cleaning schedule 🧹

The onsen is maintained by a local gentleman and may be closed for cleaning. Plan accordingly! Reddit

Bring your own towel :towel:

Towels are not provided, so remember to bring one for after your soak. TikTok

Jump in the lake! 🌊

After warming up in the onsen, take a refreshing dip in the cold lake waters. Reddit

Respect the space 🙏

This is a free, public facility. Be mindful of others and keep the area clean. Instagram

What Travellers Say

4.4
(1k reviews)

Reviews Summary

Visitors rave about the stunning lake views and the unique experience of soaking in a free, open-air onsen. The opportunity to see swans congregating in the unfrozen waters is a major draw, especially in winter. While basic, the nearby changing facilities and toilet are appreciated. Some note the proximity to residential homes as a minor detraction from total wilderness.

"Beautiful onsen, lake access, Well maintained by a friendly gentleman. Changing facilities and toilet available nearby."

Otto Hughes

"I used this onsen in the middle of May on a weekday. This public onsen is free, and the view is amazing. Fortunately, only a few people used this onsen at that time. It allows you to wear the swimsuit. After the bath, I recommend jumping into the lake, which was so cold. I loved this place so much."

Gabor Bicserdy

"It has amazing views of Lake Kussharo. The only flaw is that it's not in a total wilderness. You see some residential homes on the other side. But it's worth checking it out. The admission is free."

Ritsuko Andrews

What People Like

Beautiful lake views
Free admission
Swan sightings

What People Dislike

Basic facilities
Residential views

Frequently Asked Questions

🚇 🗺️ Getting There

Kotan Onsen is located on the eastern shore of Lake Kussharo in Akan National Park, Hokkaido. The easiest way to reach it is by car, with ample parking available. Public transport options are limited; you might need to take a bus to a nearby town and then a taxi or arrange a local transfer. TikTok

Public transport to Kotan Onsen is challenging. Buses typically run to nearby towns like Teshikaga. From there, you'll likely need a taxi or a pre-arranged shuttle. Renting a car is highly recommended for easier access. Instagram

Renting a car offers the most flexibility to explore Lake Kussharo and its surroundings, including Kotan Onsen. This allows you to stop at various viewpoints and easily access the onsen. Instagram

Yes, there are guesthouses and small inns in the vicinity of Lake Kussharo and the nearby town of Teshikaga. Booking in advance is advisable, especially during peak seasons. Reddit

While possible, it's a long day trip from cities like Sapporo. It's best enjoyed as part of a longer itinerary exploring Eastern Hokkaido to fully appreciate the area. TikTok

🎫 🎫 Tickets & Entry

Kotan Onsen is a free public hot spring. There are no admission fees, making it an accessible and budget-friendly experience. InstagramReddit

No booking is required as it's a free, open-air facility. You can visit anytime during its operational hours, though it's best to check if it's open on the day of your visit due to cleaning. Reddit

There are no fixed official opening hours as it's a natural hot spring. However, it's generally accessible during daylight hours. It's advisable to visit during the day to enjoy the views and potentially see the swans. TikTok

Kotan Onsen is generally open year-round, but it can be closed for cleaning by the local caretaker. Winter is a popular time due to the swans. Reddit

The main restriction is that the onsen may be temporarily closed for cleaning. Otherwise, it's open to all visitors. Reddit

🎫 🏞️ Onsite Experience

Basic facilities like a changing area and a toilet are available nearby. There are no showers or lockers, so come prepared. Reddit

Yes, swimwear is permitted at Kotan Onsen, though many visitors choose to bathe nude for a more traditional experience. InstagramReddit

Definitely bring a towel! You might also want water shoes for the lake, and a small bag for your belongings. TikTokReddit

It can be, but parents should be aware that nudity is common. The lake access might also require supervision for young children. Instagram

The water temperature is naturally heated and generally comfortable for soaking, though it can vary slightly. Reddit

📸 📸 Photography

The entire setting is photogenic! Capture the onsen with Lake Kussharo in the background, the swans, and the surrounding natural beauty. Golden hour offers stunning light. TikTokInstagram

Be respectful of other bathers' privacy. It's best to focus on the landscape and avoid photographing individuals without their explicit consent. Instagram

A smartphone is perfectly adequate for capturing the experience. If you have a waterproof camera or a phone case, it can be useful for shots near the water. TikTok

There are no official restrictions, but common courtesy and respect for privacy should be observed. Instagram

Sunrise and sunset offer beautiful lighting for landscape shots. Midday can be good for capturing the swans in bright light. TikTok

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