Reservations

Notice of changes to the accommodation reservation system

To further improve customer convenience, our hotel will be offering the following services from 10:00 AM on Monday, December 8, 2025:
We have moved to a new reservation system.

<For customers who made reservations using the old reservation system>

For reservations made by 10:00 AM on Monday, December 8, 2025, please click here to confirm, change, or cancel your reservation.

<To all members>

We are transferring your membership data, but you will need to reset your password for your My Page.

Shima Onsen Sekizenkan Sanso Villa

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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.

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.

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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".

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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.

SansoKashotei's
Customer only

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.

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Image: Introduction of how to spend

Image: Introduction of how to spend

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Instagram

Honkan

Sanso

Kashotei

Invitation to stay

BEST RATE
Booking from the official website is the best deal

Reservation by phone
TEL. ＋81-279-64-2101 / 9:00~18:30

Vacancy search

BEST RATE
Booking from the official website is the best deal

Notice of changes to the accommodation reservation system

We will be switching to a new reservation system at 10:00 a.m. on Monday, December 8, 2025.
We are currently transferring member data.
You will need to reset your password for My Page.

Reservation by phone
TEL. ＋81-279-64-2101 / 9:00~18:30

To customers who made reservations using the old reservation system

For reservations made by 10:00 AM on Monday, December 8, 2025, please click here to confirm, change, or cancel your reservation.

Image: Taisho Modern Japanese-Western Special Room

Image: Taisho Modern Japanese-Western Special Room

Image: Taisho Modern Japanese-Western Special Room

Image: Taisho Modern Japanese-Western Special Room

Image: Taisho Modern Japanese-Western Special Room

Hot spring half open-air bath

Capacity 6 people
type 8 tatami mats (Japanese-style room) + 8 tatami mats (Japanese-style room) +
bedroom +
Semi-open-air bath (hot spring)
Room name "Moegi 2" (Sanso 1st floor)

  • five stars

  • twin

  • cold air conditioner

  • winter kotatsu

Image: Taisho Modern Japanese-Western Special Room

The Japanese-Western special room “Moegi” with a semi-open-air bath with free-flowing hot spring water has been renovated into a Taisho-modern room that beautifully blends Japanese and Western styles while maintaining the tasteful space and the beauty of the kumiko shoji screens. The relaxing space and the bedroom are separated so that you can spend a relaxing time.
The semi-open-air bath has a wide window, so you can bathe while feeling a sense of unity with nature.
In addition, since it is the only room with a terrace in the hotel, please relax on the terrace during the nice weather.

Special Amenity Service

  • Medicinal tea
  • Sekizenkan original drip coffee
  • Imabari face towel with Sekizenkan logo
  • Imabari bath towel with Sekizenkan logo
  • LEAF&BOTANICS
    moisture shampoo
  • LEAF&BOTANICS
    moisture conditioner
  • LEAF&BOTANICS
    body soap lavender
  • LEAF&BOTANICS
    hand soap lavender
  • LEAF&BOTANICS
    skin care set olive
  • Lagora skin care+
    4-piece hair conditioner set

Image: Sekizenkan original drip coffee

Roasting techniques and forest blessings

Sekizenkan Original
drip coffee

We have prepared a special coffee made by carefully washing the highest quality raw beans with pure water, which is the blessing of the forest.

Image: Imabari towel with Sekizenkan logo

Soft, comfortable texture

Imabari towel with Sekizenkan logo

We have prepared bath towels and face towels with Sekizenkan's original logo on Imabari Towel, a representative product of Japanese quality that is "safe, secure and high quality".

Image: LEAF&BOTANICS various amenities

The power of plants goes straight to your skin

LEAF&BOTANICS
Various amenities

Image: Lagora skin care + hair conditioner 4-piece set

Men's skin care RAGORA

Lagora skin care + hair conditioner 4-piece set

Information for customers

  • All guest rooms in the Sanso will be in the designated place for dinner and breakfast.
  • There is only one room in this "Five Star Guest Room, Taisho Modern Japanese-Western Special Room" type.
  • The Sanso is a wooden building, so you can hear the sound.
    For those who are sensitive to sound, we recommend the Kashotei room.

Taisho Modern Japanese-Western Special Room
An example of a floor plan

Taisho Modern Japanese-Western Special Room Floor Plan

Image: Corner room Japanese-Western special room

Image: Corner room Japanese-Western special room

Image: Corner room Japanese-Western special room

Image: Corner room Japanese-Western special room

Image: Corner room Japanese-Western special room

Hot spring half open-air bath

Capacity 4 people
type 11.5 tatami (Japanese-style room) + bedroom +
Semi-open-air bath (hot spring)
Room name "Moegiichi" (Sanso 1F)
"Akaneichi" (2nd floor of the Sanso)

  • five stars

  • king size

  • cold air conditioner

  • winter kotatsu

Image: Concept room hot spring

The Japanese-Western style special rooms "Moegiichi" and "Akaneichi" with semi-open-air baths with free-flowing hot springs are renovated rooms that retain the beauty of kumiko shoji and the sense of unity with nature unique to a corner room in a Sanso.
The relaxing space and the bedroom are separated so that you can spend a relaxing time. The semi-open-air bath has a wide window, so you can feel the nature of the Sanso closer when you open it openly.

Special Amenity Service

  • Medicinal tea
  • Sekizenkan original drip coffee
  • Imabari face towel with Sekizenkan logo
  • Imabari bath towel with Sekizenkan logo
  • LEAF&BOTANICS
    moisture shampoo
  • LEAF&BOTANICS
    moisture conditioner
  • LEAF&BOTANICS
    body soap lavender
  • LEAF&BOTANICS
    hand soap lavender
  • LEAF&BOTANICS
    skin care set olive
  • Lagora skin care+
    4-piece hair conditioner set

Image: Sekizenkan original drip coffee

Roasting techniques and forest blessings

Sekizenkan Original
drip coffee

We have prepared a special coffee made by carefully washing the highest quality raw beans with pure water, which is the blessing of the forest.

Image: Imabari towel with Sekizenkan logo

Soft, comfortable texture

Imabari towel with Sekizenkan logo

We have prepared bath towels and face towels with Sekizenkan's original logo on Imabari Towel, a representative product of Japanese quality that is "safe, secure and high quality".

Image: LEAF&BOTANICS various amenities

The power of plants goes straight to your skin

LEAF&BOTANICS
Various amenities

Image: Lagora skin care + hair conditioner 4-piece set

Men's skin care RAGORA

Lagora skin care + hair conditioner 4-piece set

Information for customers

  • All guest rooms in the Sanso will be in the designated place for dinner and breakfast.
  • There are 2 rooms in this "five-star corner room Japanese-Western special room" type.
  • We only accept reservations by direct phone call for room designation.
    You cannot make a reservation online or by e-mail. Please note.
  • The Sanso is a wooden building, so you can hear the sound.
    For those who are sensitive to sound, we recommend the Kashotei room.

Corner room Japanese-Western special room
An example of a floor plan

Corner room Japanese-Western special room

Image: Japanese-Western special room with next room

Image: Japanese-Western special room with next room

Image: Japanese-Western special room with next room

Image: Japanese-Western special room with next room

Hot spring half open-air bath

Capacity Five people
type 10 tatami (Japanese-style room) + bedroom +
Semi-open-air bath (hot spring)
Room name "Utsukinichi" (Sanso 1F)
"Ruriichi" (Sanso 2nd floor)

  • five stars

  • twin

  • cold air conditioner

  • winter kotatsu

Image: Japanese-Western special room with next room

The Japanese-Western special rooms “Utsukinichi” and “Ruriichi”, which have a semi-open-air bath with free-flowing hot spring water, are guest rooms that have been renewed with a new study space by the window while maintaining the beauty of the kumiko shoji.
The relaxing space and the bedroom are separated so that you can spend a relaxing time. Please spend a relaxing time in the "Toki no Kihin Room", which has been loved by many celebrities and has added a new charm.

Special Amenity Service

  • Medicinal tea
  • Sekizenkan original drip coffee
  • Imabari face towel with Sekizenkan logo
  • Imabari bath towel with Sekizenkan logo
  • LEAF&BOTANICS
    moisture shampoo
  • LEAF&BOTANICS
    moisture conditioner
  • LEAF&BOTANICS
    body soap lavender
  • LEAF&BOTANICS
    hand soap lavender
  • LEAF&BOTANICS
    skin care set olive
  • Lagora skin care+
    4-piece hair conditioner set

Image: Sekizenkan original drip coffee

Roasting techniques and forest blessings

Sekizenkan Original
drip coffee

We have prepared a special coffee made by carefully washing the highest quality raw beans with pure water, which is the blessing of the forest.

Image: Imabari towel with Sekizenkan logo

Soft, comfortable texture

Imabari towel with Sekizenkan logo

We have prepared bath towels and face towels with Sekizenkan's original logo on Imabari Towel, a representative product of Japanese quality that is "safe, secure and high quality".

Image: LEAF&BOTANICS various amenities

The power of plants goes straight to your skin

LEAF&BOTANICS
Various amenities

Image: Lagora skin care + hair conditioner 4-piece set

Men's skin care RAGORA

Lagora skin care + hair conditioner 4-piece set

Information for customers

  • All guest rooms in the Sanso will be in the designated place for dinner and breakfast.
  • There are 2 rooms in this ``Five Star Guest Room with Next Room, Japanese and Western Special Room'' type.
  • We only accept reservations by direct phone call for room designation.
    You cannot make a reservation online or by e-mail. Please note.
  • The Sanso is a wooden building, so you can hear the sound.
    For those who are sensitive to sound, we recommend the Kashotei room.

Japanese-Western special room with next room
An example of a floor plan

Floor plan of the Japanese-Western special room with the following room

Image: Japanese modern guest room

Image: Japanese modern guest room

indoor bath

Capacity Five people
type Ruri Roku 6-tatami Japanese-style room + 6-tatami carpet +
Bedroom Rurihachi 12 tatami Japanese-style room + bedroom
Room name "Ruri Roku" (Sanso 2nd Floor)
"Rurihachi" (Sanso 2nd floor)

  • four stars

  • twin

  • cold air conditioner

  • winter kotatsu

Image: Hot spring in a modern Japanese room

We renewed the beauty of the kumiko shoji under the concept of “learning from the past”. A modern room where nostalgia and newness coexist in a modern space that combines Scandinavian furniture while making use of traditional materials.
The relaxing space and the bedroom are separated so that you can spend a relaxing time. There is also a spacious sofa, and it is a popular room for guests staying multiple nights.

Special Amenity Service

  • Sekizenkan original drip coffee
  • LEAF&BOTANICS
    Skin care set Junmaishu
  • Lagora skin care+
    4-piece hair conditioner set

Image: Sekizenkan original drip coffee

Roasting techniques and forest blessings

Sekizenkan Original
drip coffee

We have prepared a special coffee made by carefully washing the highest quality raw beans with pure water, which is the blessing of the forest.

Image: LEAF&BOTANICS skin care set Junmaishu

For moist, moisturized and fine skin

LEAF&BOTANICS
Skin care set Junmaishu

Image: Lagora skin care + hair conditioner 4-piece set

Men's skin care RAGORA

Lagora skin care + hair conditioner 4-piece set

Information for customers

  • All guest rooms in the Sanso will be in the designated place for dinner and breakfast.
  • There are 2 rooms in this "4-star Japanese modern room" type.
  • We only accept reservations by direct phone call for room designation.
    You cannot make a reservation online or by e-mail. Please note.
  • The Sanso is a wooden building, so you can hear the sound.
    For those who are sensitive to sound, we recommend the Kashotei room.

Japanese modern guest room
An example of a floor plan

Floor plan of Japanese modern guest room

Image: Minimum designer Japanese room with open-air bath

Image: Minimum designer Japanese room with open-air bath

Hot spring open-air bath shower No indoor bath

Capacity 2 people
type 6-tatami mat Japanese-style room + open-air bath
Room name "Utsukin 5" (Sanso 1F)

  • cold air conditioner

  • winter kotatsu

Image: A minimum designer Japanese-style room with an open-air bath

Renewal in December 2021.
The room is compact with 6 tatami mats, but it is a room with an open-air bath where you can enjoy the hot spring whenever you like.
It is a new guest room with a modern and mature atmosphere that has been carefully preserved from the time when the Sanso was built, such as "Kumiko shoji". Please spend a relaxing time away from everyday life.

Special Amenity Service

  • LEAF&BOTANICS
    moisture shampoo
  • LEAF&BOTANICS
    moisture conditioner
  • LEAF&BOTANICS
    body soap lavender
  • LEAF&BOTANICS
    hand soap lavender
  • LEAF&BOTANICS
    skin care set olive
  • Lagora skin care+
    4-piece hair conditioner set

Image: LEAF&BOTANICS various amenities

The power of plants goes straight to your skin

LEAF&BOTANICS
Various amenities

Image: Lagora skin care + hair conditioner 4-piece set

Men's skin care RAGORA

Lagora skin care + hair conditioner 4-piece set

Information for customers

  • All guest rooms in the Sanso will be in the designated place for dinner and breakfast.
  • The Sanso is a wooden building, so you can hear the sound.
    For those who are sensitive to sound, we recommend the Kashotei room.

Minimum designer Japanese style room with open-air bath
An example of a floor plan

Floor plan of a minimal designer Japanese-style room with open-air bath

Image: Sanso standard guest room

Image: Sanso standard guest room

Image: Sanso standard guest room

Image: Sanso standard guest room

Image: Sanso standard guest room

No indoor bath

Capacity 3 people
type 8 tatami (Japanese-style room)
Room name "Utsukin 2" (Sanso 1F)
"Utsukinsan" (Sanso 1F)
"Ruriji" (Sanso 2nd floor)
"Rurisan" (Sanso 2nd Floor)
"Akaneji" (2nd floor of the Sanso)
"Akanezo" (Sanso 2nd Floor)

  • cold air conditioner

  • winter kotatsu

Image: A standard room in a Sanso

This is a room that retains the beauty of its time, a registered tangible cultural property of Japan, a tasteful Momoyama-style space, and the beauty of its kumiko shoji screens. The warmth of wood unique to a wooden building and the greenery seen from the window make you feel the good old Showa era.
This is a popular room for those who want to enjoy the Showa retro space and those who want to fully enjoy the hot springs in the hotel. Please enjoy a relaxing " Sanso time" in the standard room of the Sanso .

Special Amenity Service

  • Margaret Josephine Dry Rescue Skin Care 4 Piece Set
  • Lagora skin care+
    4-piece hair conditioner set

Image: Margaret Josephine Dry Rescue Skin Care 4-piece set

Environment-friendly and skin-friendly skin care

Margaret Josephine Dry Rescue Skin Care 4 Piece Set

Image: Lagora skin care + hair conditioner 4-piece set

Men's skin care RAGORA

Lagora skin care + hair conditioner 4-piece set

Information for customers

  • All guest rooms in the Sanso will be in the designated place for dinner and breakfast.
  • There are 6 rooms in this "Sanso villa standard room" type.
  • We only accept reservations by direct phone call for room designation.
    You cannot make a reservation online or by e-mail. Please note.
  • The Sanso is a wooden building, so you can hear the sound.
    For those who are sensitive to sound, we recommend the Kashotei room.

Sanso standard guest room
Example of floor plan

The floor plan of the standard guest room at the Sanso

Basic equipment

  • free internet connection(wireless)
  • Indoor air cleaner/humidifier
  • liquid crystal television
  • refrigerator
  • kettle pot
  • Hairdryer
  • safety box
  • Alarm Clock
  • flashlight

Basic amenities

  • Tea set (Sencha)
  • Face towel
  • bath towel
  • toothbrush
  • tabi socks
  • yukata
  • Haori
  • hot water basket
  • For men (razors, combs, cleansing foam, lotion, milky lotion, hair styling products)
  • For women (cleansing, lotion, moisturizing cream, cotton swab, cotton,Hair band/shower cap, hairbrush)
    * Kashotei, rinse,Body soap
  • We also have yukata, haori, and slippers for children.

Image: Yukata for children

Make your child's stay comfortable
Children's amenities

At Sekizenkan, we have prepared amenities for children so that you can stay with your children with peace of mind. Please contact us for details, as the contents available vary depending on the room.
  • Yukata for children
  • Haori
  • slipper
  • Children's work clothes (some guest rooms)

Other special amenities are available depending on the room.
For details, please check the details of each room.