An adults-only secluded hot spring Accommodation — Deep in Shirahone, melt into the waters. —
An adults-only Accommodation with just 10 rooms, quietly nestled a short distance from the Shirahone Onsen town. Inside, you’ll hear only the wind and rustling leaves—and the gentle presence of the hot springs. In this serene space free of distractions, 100% free-flowing natural spring water fills milky-white baths that softly relax both body and mind. In Shirahone’s only complimentary private open-air bath, enjoy a luxurious moment surrounded by untouched nature. For dinner, we offer creative dishes made with drinkable Onsen water, such as Onsen shabu-shabu and Onsen rice porridge. Leave everyday life behind—simply soak, unwind, and enjoy a deeply restorative stay that feels as though you melt into the waters themselves.
This was my second visit. I felt the meals were even more satisfying than last time. When I asked, I was told that the proprietress herself stands at the pantry. Her heartfelt hospitality truly came through. I enjoyed the lovely flowers in the room, as well as the charming children’s drawings displayed throughout.As I was leaving and filling water outside, they kindly filled my brought-in plastic bottles at the sink for me—so much heavy water to carry. They also showed me a back route to Norikura Eco Line, an exciting road. Thank you for everything.The milky-white, fragrant hot spring water lingered with its scent for quite a while. Hoping to return again—wishing happiness to everyone here.
I finally got to visit Shirahone Onsen and soak in its milky-white waters.The meals and the hospitality/service were just right,and I had an even better time than expected.
| IN | 15:00～17:00 |
|---|---|
| OUT | 10:00 |
| Number of rooms | 10 rooms |
| Pet | Not allowed |
| Your child | Not allowed |
![[Main Building / Relaxing Japanese-Modern Twin <Shirakaba>]](https://www.img-ikyu.com/contents/common/image/acc7/00002337/1/org/14143002.jpg?auto=compress,format&lossless=0&w=560&h=370)
Private Open-Air Hot Spring Bath
A highly reputed hot spring known for its gentle sulfur scent and milky-white waters, said to “keep colds away for three years after bathing for three days.” The only free private open-air Onsen in Shirahone Onsen is surrounded by beautiful birch woods that change with the seasons, offering a truly luxurious time. In the semi-open-air bath, you can soak in a tub shaped by nature—formed as minerals from the source crystallized—while enjoying a quiet soak and drinking the spring water.
Sample guest room
A quiet Room surrounded by birch woods, with fresh, pleasant air. Step away from everyday life and enjoy time wrapped in the soothing stillness unique to a single Accommodation. The detached special Room is a relocated traditional house built in the Edo period, offering a guest Room filled with classic Japanese charm.
Sample dishes
We offer kaiseki cuisine featuring Shinshu ingredients and the colors of the four seasons. Please enjoy our simple yet memorable “mountain feast.” You can also savor creative dishes made with our drinkable Onsen hot spring source, such as “Onsen Shabu-Shabu” and “Onsen Rice Porridge.”
As of October 2026, 27 Accommodations across the whole country, including ours, have begun a new journey as the YADORIE Accommodation Group.
We look forward to welcoming you with the unique hospitality of each of our 27 Accommodations.
To celebrate the launch of the YADORIE Accommodation Group, we are also running a special campaign and look forward to your participation.
Thank you very much for your continued patronage of Shirahone Onsen Konashi-no-Yu Sasaya.
We would like to inform you that, in response to many requests from our guests, we plan to transition—around next year—to an Accommodation exclusively for adult guests.
Accordingly, we will no longer accept new Reservations for stays accompanied by children (elementary school age or younger).
To guests who have stayed with children in the past, we sincerely apologize for any inconvenience and express our heartfelt gratitude for your support.
For guests who already have a Reservation with children, please rest assured that we will welcome you as always with sincere hospitality.
We kindly ask for your continued support of Konashi-no-Yu Sasaya as we move forward with this change.
Please also note that while new Reservations accompanied by children are no longer accepted, until the transition is fully completed there may still be occasions when families with children are staying at the Accommodation. Thank you for your understanding.
Konashi-no-Yu Sasaya
Thank you very much for your continued patronage of Konashi-no-Yu Sasaya.
Matsumoto City will introduce an Accommodation Tax starting with stays from June 1, 2026.
Accordingly, guests staying at our Accommodation will be required to pay the Accommodation Tax in addition to the Accommodation Fee.
■Accommodation Tax Overview
- Start date: Applicable to stays from June 1, 2026
- Who is subject to the tax: Guests staying at Accommodations within Matsumoto City
- Amount: JPY 300 per person per night (breakdown: JPY 150 city / JPY 150 prefecture)
* For the first three years (June 1, 2026–May 31, 2029), the amount will be JPY 200
(breakdown: JPY 100 city / JPY 100 prefecture)
Please note that even if a Reservation was made before June 1, the Accommodation Tax will apply to stays on or after June 1.
For details, please refer to the Matsumoto City website.
https://www.city.matsumoto.nagano.jp/soshiki/14/194906.html
We sincerely appreciate your understanding and cooperation.
We look forward to welcoming you again at Sasaya.
| Taxes | A Hot Spring Tax of JPY 150 per adult will be collected separately. The Hot Spring Tax is not included in the Plan, so please pay it at the Accommodation. |
|---|---|
| Card information | VISA / MASTER / JCB / AMEX / DINERS / UnionPay |
| Pets | Not allowed |
| Breakfast | There is no information about breakfast. |
| Your child | You cannot stay. |
| Room service | Not available |
| Common amenities |
|
| Facilities and Features |
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| Esthetic Massage | None |
| Fitness gym | None |
| Public Bath |
|
| Open-air bath |
|
| Private bath |
|
| Spring quality and benefits | Sulfur- Calcium/Magnesium- Bicarbonate Onsen Chronic digestive disorders, sensitivity to cold, fatigue recovery, chronic skin conditions, neuralgia, cuts and minor wounds, muscle pain, motor paralysis, recovery after illness, and chronic gynecological conditions. ※Regarding the notation of "Gensen Kakenagashi" |
| Sauna | None |
| Hot stone spa | None |
*Reviews that have been translated from Japanese.*
*Showing only reviews from 一休.com (Japanese) and Yahoo!トラベル.*
[From JR Matsumoto Station]
- Take the Matsumoto Electric Railway to Shin-Shimashima Station, then take a bus (about 60 minutes).
One-way bus fare: ¥2,260
- Taxi: about 90 minutes (approx. ¥21,000)
[From Shinshu Matsumoto Airport]
- Taxi: about 90 minutes (approx. ¥21,000)
・Business Hours: 15:00～22:00 ・Hot spring: Available ・Free-flowing: Available ・Cloudy hot spring water: Available ・Supplementary information: 100% natural hot spring (Heating) The only free private open-air bath in Shirahone Onsen is available in 30-minute private sessions. Reservations are accepted on a first-come, first-served basis at check-in, with one slot per Room. Additional Reservations can be made once all same-day guests have Completed their Reservations.
The spring quality and efficacy of the hot spring are as follows. ・Spring quality: Sulfur- Calcium/Magnesium- Bicarbonate Onsen ・Spring efficacy: Chronic digestive disorders, sensitivity to cold, fatigue recovery, chronic skin conditions, neuralgia, cuts and minor wounds, muscle pain, motor paralysis, recovery after illness, and chronic gynecological conditions.
There are the following facilities and features. Hot spring・Open-air bath・Free-flowing hot spring・Large public bath・Private bath
[From JR Matsumoto Station] - Take the Matsumoto Electric Railway to Shin-Shimashima Station, then take a bus (about 60 minutes). One-way bus fare: ¥2,260 - Taxi: about 90 minutes (approx. ¥21,000) [From Shinshu Matsumoto Airport] - Taxi: about 90 minutes (approx. ¥21,000)
・Fee： Free for guests ・Parking Hours： 15:00–10:00 ・Parking space： Length --- Vehicle width --- Vehicle height --- ・Number of parking spaces： 10 cars ・Valet Service： Unavailable
・Business Hours: 15:00～22:00 ・Hot spring: Available ・Free-flowing: Available ・Cloudy hot spring water: Available ・Supplementary information: 100% natural hot spring (Heating) The free private open-air bath is available in 30-minute private time slots. Reservations are accepted on a first-come, first-served basis at check-in, with one slot per Room. Additional Reservations can be made once all same-day guests have completed their Reservations.
Connection is possible. ・Wi-Fi is available. For more details, please refer to the room and plan information.
![[Breakfast]](https://www.img-ikyu.com/contents/common/image/acc7/00002337/2/org/14270525.jpg?auto=compress,format&lossless=0&fit=crop&w=200&h=200&q=30)
