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Unzen Onsen Seiunso

Nagasaki Prefecture／30 minutes by car or taxi from Shimabara Port

A healing property embraced by nature "Unzen Onsen Seiunso"

Unzen Onsen Seiunso, located in a national park at an altitude of about 700 meters, is a relaxing retreat surrounded by nature. The spacious guest rooms feature a refined design and bright atmosphere, offering comfort just like home. Enjoy expertly crafted dishes made with local ingredients. The milky-white Onsen water from our own private source—known as the “beauty bath”—lets you unwind to your heart’s content while immersed in the stunning scenery of every season.

4.53 - Wonderful(64)
  • With my grandchildren

    I stayed with my grandchildren, a kindergarten senior and a 2-year-old.The Room was more spacious than expected, clean, and relaxing.There were children’s amenities and yukata rentals, and the staff were very helpful.The dinosaur fair was more authentic than I expected, and there was also a small kids’ area.The accommodation cost was affordable, so we were satisfied.

    Yahoo!トラベルユー... 7/28/2026
  • The open-air bath was amazing.

    This was my second visit to Unzen Onsen in 27 years.I heard it used to be a public lodging facility, but it seems to have been renovated and was very clean and beautiful.The open-air bath in particular was outstanding. The view was wonderful, and the milky-white water left my skin feeling moisturized afterward, as if I had applied lotion.You can borrow cute yukata next to the front desk. At night, we went out to see the illuminated Onsen Shrine. Depending on the time, they also offer Shuttle Service.If I have the chance to come again, I will definitely stay at this Accommodation!

    Yahoo!トラベルユー... 7/19/2026

Facilities and Services

See All
  • Hot spring
Open-air bath / Free-flowing hot spring / Large public bath / Private bath / Free shuttle service
IN15:00～19:00
OUT10:00
Number of rooms63 rooms
PetNot allowed
Your childPermitted

Photo

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Introduction of the Accommodation

Onsen

Enjoy skin-beautifying waters—Seiunso’s free-flowing natural Onsen from the source

Seiunso’s Onsen features free-flowing water directly from its own private source. The milky-white waters, beloved as a “beauty bath,” are known for their abundant volume. Unwind in the open-air bath surrounded by Unzen’s great nature, or relax in the spacious indoor bath. Enjoy a blissful time that soothes your everyday fatigue.

Guest Rooms

Relax in a guest room filled with the warmth of nature

Seiunso’s Rooms are bright spaces filled with natural light. With spacious layouts, every Room features refined interiors. Free Wi‑Fi and well-equipped in-room amenities support a comfortable stay. We offer a variety of types, including Japanese-style and Western-style Rooms, so you can choose the Room that best suits your needs.

Seasonal Special Kaiseki Course

Seasonal cuisine featuring locally sourced delicacies from the mountains and sea

At Seiunso’s restaurant, we serve dishes made with ingredients nurtured by the rich nature of the Shimabara Peninsula, with a strong commitment to local production for local consumption. Our chef’s creations are seasonal specialties that let you feel the changing seasons. Breakfast highlights local flavors with a daily rotating menu, so even guests on a Multiple Night Stay won’t get bored.

Facilities and Equipment of Accommodation

  • The room
    The room
  • Hot Springs & Baths
    Hot Springs & Baths
  • Meal
    Meal

Notice from the Accommodation

  • Dinosaur Plan 1

    Dinosaurs are coming to Seiunso again this summer! Seiunso Dinosaur Land is now open!

    Due to overwhelming popularity, the Dinosaur Land event currently underway has been extended until the end of September—Done!!
    Enjoy a special collaboration event with Schleich, the German figure manufacturer loved worldwide for its highly detailed dinosaur figures!
    (Event period: Wednesday, July 1, 2026 – Wednesday, September 30, 2026)

    This event is a collaboration with Schleich, renowned worldwide for its realistic detail!
    Inside the facility, you’ll find impressive large-scale dinosaur figures on display, along with plenty of activities for all ages—such as a stamp rally and fossil excavation experiences.
    As an all-weather indoor event, you can enjoy it without worrying about extreme summer heat or bad weather.
    After having fun inside, head to the Onsen with the whole family.
    Refresh together in our free-flowing natural hot spring “Beautiful Skin Bath,” perfect for both adults and children!

  • Seiunso Exterior (Daytime)

    Notice of Available Dates for School Trip Bookings

    • Notice of School Trip Booking Dates
    Thank you very much for choosing Unzen Onsen Seiunso.
    We would like to inform you of the scheduled dates for accepting school trip groups through December 2026.
    While students are using the baths, the large public bath and private baths will be temporarily unavailable.
    The open-air bath will remain available as usual.
    We apologize for any inconvenience this may cause to our guests and appreciate your understanding and cooperation.

    [Scheduled School Trip Stay Dates]
    2026
    February: 3, 4
    March: 4
    May: 13, 14, 19, 21, 27, 28, 29
    June: 2, 4, 17
    September: 29, 30
    October: 4, 8, 14,15 ,16 ,18 ,20 ,22 ,27 ,28 ,29
    November:4 ,5 ,13 ,24 ,26
    December :1 .3 .8 .9

    *Please note that the above schedule is subject to change without notice. Thank you for your understanding.*

    [Bath Hours]
    Large Public Bath:11 :00–8 :30 (next morning)
    Open-Air Bath :7 :00–21 :00

Basic Information

Card information
VISA / MASTER / JCB / AMEX / DINERS
Pets
Not allowed
BreakfastThere is no information about breakfast.
Your child
You can stay.
Room service
Not available
Common amenities
  • × Shampoo · conditioner
  • × Body soap · soap
  • ○ Towel · Bath towel
  • × Body towel · sponge
  • ○ Toothbrush set
  • ○ Comb · Brush
  • × Shower cap
  • ○ Hair dryer
  • × Shaving
  • × Shaving Gel/Foam
  • × Bath additives
  • ○ Yukata
  • ○ Nightwear
  • × Bathrobe
  • ○ Slippers
  • ○ facial cleanser
  • × Toner
  • × Lotion
  • × Makeup remover
  • × Cotton swab
  • × Cotton
  • × Clothing deodorizing spray
  • ○ Refrigerator
  • × Minibar
  • ○ Electric kettle
  • × Tea set (free)
  • ○ Television
  • ○ Safe
  • × Scale
  • × Trouser press
  • × Free morning edition
  • × Pay-per-view broadcast
  • ○ Satellite broadcasting
  • × Video on Demand
  • × Radio
  • × CD player
  • × DVD player
  • × Blu-ray player
  • × Speakers for portable audio
  • × In-room PCs and tablets
Facilities and Features
  • ○ Hot spring
  • × Rooms with open-air baths available
  • ○ Open-air bath
  • ○ Free-flowing hot spring
  • ○ Large public bath
  • ○ Private bath
  • × Sauna
  • × Ganbanyoku (rock bathing)
  • × Within a 5-minute walk from the station
  • × Within a 5-minute walk to the convenience store.
  • × Indoor pool
  • × Outdoor pool
  • × Pet-friendly
  • × Spa facility
  • × Fitness
  • ○ Free shuttle service
  • × Shuttle Service (Paid)
  • × Room service
  • × Room Service Available 24 Hours
  • × Barrier-free
  • × Childcare services
Esthetic Massage
None
Fitness gym
None
Public Bath
The number of Public Bath
2
Business Hours
11:00~08:30
Hot spring
Available
Free-flowing
Available
Milky hot spring water
Available
Additional Information
(Add water)
Remarks
Available from 11:00 AM to 8:30 AM the following morning.
Open-air bath
The number of Open-air bath
2
Business Hours
07:00~21:00
Hot spring
Available
Free-flowing
Available
Milky hot spring water
Available
Additional Information
(Add water)
Remarks
Private bath
The number of Private bath
2
Business Hours
---
Hot spring
Available
Free-flowing
Available
Milky hot spring water
Available
Additional Information
(Add water)
Remarks
Fee: 2,500 yen (50 minutes) Reservation required
Spring quality and benefits

Simple Onsen, Sulfur Onsen

Neuralgia, muscle pain, joint pain, digestive disorders, cold sensitivity, fatigue recovery, skin diseases, gynecological diseases, diabetes, hypertension, arteriosclerosis

SaunaNone
Hot stone spaNone

Reviews

Overall Score
4.53
Wonderful (64)
  • Rooms & Amenities
    4.45
  • Facility
    4.48
  • Hospitality & Service
    4.39
  • Meals
    4.45
  • Onsen & Bath
    4.81
  • Satisfaction
    4.56

*Reviews that have been translated from Japanese.*

*Showing only reviews from 一休.com (Japanese) and Yahoo!トラベル.*

Access Information

Address
Nagasaki PrefectureUnzen City, Obama Town, Unzen 500-1
TEL：+81-957-73-3273

- Nearest station: JR Isahaya Station (approximately 50 minutes by car)
- Nearest airport: Nagasaki Airport (approximately 70 minutes by car)
- Nearest IC: Isahaya IC (approximately 50 minutes by car)
- Nearest port: Shimabara Port (approximately 60 minutes by car or bus)

Parking Information
Fee
Free for guests
Parking time
---
Parking space
No restrictions
Number of parking spaces
200 cars available outdoor
Valet service
Unavailable

Pickup and drop-off information
Available (Free)※Reservation Required

Frequently Asked Questions

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