special time flows, Showa retro space
A Sanso also known as the “romantic Sanso ” that tells the story of the glory of the Showa era.
The great men who survived that era, have their thoughts in this place,
Healed by the appearance of coexisting with nature,
You were enjoying your vacation.
A summer resort loved by the great men of the Showa era,
A special time flows here.
Onsen HOT SPRING
Hot springs are
the home of life
A hot spring that is effective against 40,000 ailments. You can freely enjoy one of Japan's best quality hot springs, each of which has its own taste.
Food DISHES
Kaiseki cuisine that vividly
reflects the four seasons

Kaiseki cuisine is carefully prepared with carefully selected ingredients from all over the country, including fresh local vegetables. Please enjoy the uncompromising "Essence of Wa".
Room
A romantic space that
tells the story of the glory
of the Showa era

You can enjoy the craftsmanship of Showa master craftsmen with beautiful kumiko shoji, which is different for each room. Due to the beauty of its form and the precision of its work, it has been registered as a registered tangible cultural property of Japan as a modern heritage of Gunma Prefecture.
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Five-star guest room★★★★★
Taisho Modern Japanese-Western Special Room
Hot spring half open-air bath
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Five-star guest room★★★★★
Corner room Japanese-Western special room
Hot spring half open-air bath
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Five-star guest room★★★★★
Japanese-Western special room with next room
Hot spring half open-air bath
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Four-star guest room★★★★☆
Japanese modern guest room
No indoor bath
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Minimalist designer Japanese-style room with semi-open-air bath
Hot spring half open-air bath shower No indoor bath
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Sanso standard guest room
No indoor bath
SansoKashotei's
Customer only
Sanso Lounge Izutsu
The lounge on the 3rd floor of the Sanso, which opened in 2021, can be used by guests staying at Kashotei and Sanso. You can enjoy medicinal tea, black tea, coffee, juice, ice cream, etc. at self-service.
*Sanso, Kashotei's Customer only.
A proposal for your stay
[Anniversary plan of Sekizenkan] ~ A day to deliver your feelings to your loved ones ~ Please choose the benefits according to the content of the celebration
From 34,100 yen
[Early bird discount 90] Up to 8,000 yen discount on a "Five-star room" with hot spring! Early reservations are a good deal / Seasonal Kaiseki meal <Online reservations only>
From 37,400 yen
Introduction of how to spend
Notice from Sanso
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Kashotei
Sanso
Honkan
Reservations for July accommodations will begin at 10am on January 31st.
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Kashotei
Sanso
Honkan
Notice
Information about Mori no Yu
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Sanso
Honkan
Notice
Notice regarding elevator construction at Kashotei(for guests staying from January 18 to 21)
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Kashotei
Sanso
Honkan
Notice
For guests visiting during the winter season
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Kashotei
Sanso
Honkan
Announcement of Kiyoshi Shomura Guitar Concert (May 15, 2025)