What Is Unzen Onsen? A Historic Hot Spring Town in Japan’s First National Park
Unzen Onsen is one of Japan’s premier highland hot spring resorts, located about 700 meters above sea level in the central Shimabara Peninsula in Unzen City, Nagasaki Prefecture.
It lies within Unzen-Amakusa National Park, which was designated Japan’s first national park in 1934, and is known for its magnificent volcanic landscapes and abundant hot spring resources.
Long cherished as a therapeutic hot spring area, it developed further from the Meiji era onward as a summer retreat and health resort for foreign visitors.
Today, it continues to attract many travelers from Japan and abroad.
The waters are known for a distinctive sulfur aroma, and depending on the source, the springs can appear clear or milky white, offering a variety of bathing experiences.
Top Things to See at Unzen Onsen
1. The powerful Unzen Jigoku (Unzen Hell) walk
Unzen Jigoku, the symbol of Unzen Onsen, is a striking area where high-temperature steam and volcanic gases rise from the ground in many places.
Vents are scattered throughout, and you can safely explore along the boardwalks while seeing spots such as Daikyōkan Jigoku (Daikyōkan Hell), Oito Jigoku, and Hachiman Jigoku.
The walk takes about 30–60 minutes, and along the way you can warm your feet at “Ashi-mushi” steam foot-warming spots and enjoy hot spring eggs steamed by the geothermal vapor (Unzen Jigoku Kobo; 10:00–17:00).
There are also signs explaining the area’s historical background, and nearby you may find places marked by martyr memorials.
2. Beautiful nature with hiking and trekking
Unzen Onsen is a highland resort where you can enjoy nature in every season.
In spring (late April to mid-May), Miyama Kirishima (a type of azalea) colors the Nita Pass area pink, and in autumn (late October to late November), Mount Unzen is covered in vivid fall foliage.
In winter (January to February), rime ice can coat the mountains, creating a dreamlike snowy landscape.
Mount Unzen has multiple hiking routes for beginners through advanced hikers, and if you use the Nita Pass Ropeway, you can reach Myōken-dake at 1,333 meters in about 3 minutes.
3. History and culture
Unzen Onsen is steeped in history.
In the Meiji era, many foreigners visiting Japan via the Shanghai route came here as a summer resort, helping it develop into an international retreat.
Classical buildings reminiscent of that era still dot the hot spring town, allowing you to feel its history as you stroll.
4. A relaxing stay amid rising steam
The hot spring town offers a wide range of accommodations, from long-established ryokan with over 100 years of history to modern resort hotels.
Many lodgings feature large public baths and open-air baths fed by natural hot springs, letting you refresh both body and mind amid the sulfur-scented steam.
Many facilities also offer day-use bathing, and there are three public bathhouses—one each in the Furu-yu, Shin-yu, and Kojigoku areas.
5. Local food
In Unzen Onsen, local cuisine inspired by volcanic blessings is another highlight.
The local specialty “Unzen Hayashi” is a newer signature dish inspired by Western meals once served to foreign summer visitors, and each restaurant serves its own original recipe.
“Jigoku-mushi” geothermal steamed dishes, hot spring eggs, and fresh seafood meals are also delicious.
How to Get to Unzen Onsen
By public transportation
- From Nagasaki Station
- From Nagasaki Station, take Shimabara Railway bus (Shimabara/Unzen/Isahaya line) to the “Unzen” bus stop in about 100 minutes.
- The center of the hot spring town is just a short walk from the bus stop.
- From Isahaya Station
- From Nagasaki Airport, take the limousine bus to Isahaya Station in about 20 minutes.
- From Isahaya Station, take Shimabara Railway bus to Unzen Onsen in about 80 minutes.
By car
- About 60 minutes from “Isahaya IC” on the Nagasaki Expressway.
- There are multiple parking lots around the hot spring town (paid; some free).
How to Enjoy Unzen Onsen
1. Unzen Jigoku walk and foot bath time
There are foot bath spots along the Jigoku route and in the center of town, perfect for soothing tired legs during your stroll.
The foot bath plaza near “Unzen Oyama no Jōhōkan” is covered by a roof and offers a comfortable temperature of about 40°C.
2. Relax at your accommodation
If you choose a room with a private open-air bath, you can enjoy a luxurious, private hot spring time.
Even without staying overnight, many facilities offer day-use bathing, so you can easily experience Unzen’s waters.
3. Enjoy local cuisine
At restaurants and cafés in town, taste Unzen Hayashi, jigoku-mushi dishes, and other meals using local specialties.
It’s also a classic to grab freshly steamed hot spring eggs to-go at Unzen Jigoku Kobo.
Useful Visitor Information
- Unzen Jigoku
- Open for walking, free admission
- Boardwalks are maintained; about 30–60 minutes required
- Hot spring eggs
- Unzen Jigoku Kobo: 10:00–17:00 (ends when sold out)
- Nita Pass Ropeway
- Adults round trip: 1,290 yen / Children round trip: 650 yen
- Hours vary by season (Apr–Oct: 8:31–17:23 / Nov–Mar: 8:31–17:11)
- What to wear
- As a highland area at about 700 meters elevation, mornings and evenings can be cool even in summer.
- Bring comfortable shoes and an extra warm layer.
- Notes
- Some areas around the Jigoku have a strong sulfur smell.
- If you have asthma or respiratory conditions, monitor your condition carefully; if you feel unwell, rest and don’t push yourself.
- Leaving the boardwalk can cause burns, so do not go beyond fences or barriers.
Summary
Unzen Onsen is one of Nagasaki’s top hot spring destinations, where history, nature, and relaxation come together in Japan’s first national park.
From the dramatic Jigoku walk to seasonal scenery and soothing baths, it’s a special place that helps you forget everyday fatigue just by visiting.
Be sure to visit Unzen Onsen as a highlight of your Nagasaki trip!
