Date & Guest

142yrs. Old House "Kojimaya Ryokan"

Various meiji antiques, magazines, and more avail !



About "Kojimaya Ryokan
The view of Mount Myogi is recognized as one of the three most beautiful sights in Japan along with the serene sounds of the "Usui River" flowing along the old Nakasendo.

The Isobe Hot Spring is located in the poetically rich area of Annaka, Joshu. Isobe Onsen is a 100% natural hot spring with a rich source.

It is also the birthplace of the familiar onsen symbol (♨).
This symbol was already written on a drawing in 1661 as a symbol to indicate Isobe Onsen.
The recognition of "Isobe" as a hot spring was widespread among the people.

And since the eruption of Mount Asama in 1783, the amount of hot spring water that gushed out has increased even more.

In the Edo period (1603-1868), it was used as a hot spring resort for travelers and vendors passing through on the Nakasendo highway.
In the Meiji and Taisho eras, it was used as a vacation home by politicians, businessmen, and literary figures, and flourished as a place for therapeutic baths for the treatment of illnesses from all over Japan.

Our hotel, Kojimaya Ryokan, founded in 1879, was originally designed for long-term hot spring recuperation while cooking for oneself.

Today, the guest house is used by a wide range of guests for many purposes, including solo travelers, golfers, business travelers, and families.

It is an onsen ryokan with a relaxed atmosphere.

Points of pride at Kojimaya Ryokan
1) Enjoy 100% natural hot spring water from the source!
 The first and foremost thing about Isobe Onsen is the quality of its water. We draw our water directly from the source and let it flow freely so that you can enjoy a luxurious bath.

There are two springs, one of which is an old mine that is now used as an ingredient for the hot spring specialty "Isobe senbei" (rice crackers).

The other is a new mineral spring that gushed forth in 1996. The new mineral spring is mainly used for bathing at Isobe Onsen.

Because it is a source spring, the ingredients are dense and easily permeate the body, making it a highly effective type.
The water is soft and gentle on the body.

During your stay, please take care of your physical condition, rehydrate yourself, and enjoy the hot spring water while resting. It is also a good idea to take a stroll to the hot spring town for a change of scenery.

2) Experience the good old days at a retro ryokan with Taisho romanticism!
After the Meiji Restoration, the government's policy of westernization under the slogan of "civilization opening" quickly spread throughout Japan.
In Gunma Prefecture, many highly artistic brick buildings were built, embodying the craftsmanship and splendor of modern Western architecture.

Our building was renovated in the late Taisho and early Showa eras using the same scratch bricks as the Gunma Prefectural Office.
The pale green painted brick building with wooden frame arched windows still stands today.

The interior fittings have also become more beautiful with age, creating a space with a Taisho-roman feel. It is also popular among those who love old houses.

3) A taste of mother's home in Joshu (meal)
 We offer home-cooked meals using a variety of seasonal local vegetables by a professional mother-liked chef!

Dinner: Sashimi, fish dish, meat dish, fried dish, simmered dish, a small bowl of cooked dish, one-pot dish
     soup, rice, and dessert

We offer a wide variety of dishes for you to enjoy.
The menu is subject to change depending on the season and the availability of the day.
Example: Spring: Tempura of butterbur's leaf, rice with bamboo shoots, etc.
Summer ... myoga tempura, cold soup, etc.
Autumn ... Buri-daikon (yellowtail and radish), pork miso soup, etc.

Breakfast: Grilled fish, fried egg, natto (fermented soybeans), grilled seaweed, pickles, miso soup
Rice and yogurt
This is the royal road of Japanese breakfast. A great way to start the day!

Please note that there is no allergy support.

Looking back at the good old things and the way we came... (Exhibit)
We believe in the importance of "human connection" and "time".
We strive to provide our guests with a comfortable, fulfilling, and satisfying experience.
Throughout the building, you will find nostalgic and heartwarming decorative dolls, as well
"We also display small household items that are known as "beauty of use.
There are also old magazines on display for your viewing pleasure.

The Isobe hot spring town can be toured within a five-minute walk from Isobe Station.
Everyone has probably eaten the specialty Isobe rice crackers at least once.
They are made with only flour, sugar, and mineral water (hot spring water), and swell up with the mineral water.
The slight saltiness of the rice crackers gives them a gentle, subdued flavor.
Nowadays, there are many different flavors, so why not try them all?

 In the neighborhood...

-The brick structures of the Usui Pass Railway that supported the modernization of Japan (25~40 minutes by car)
The brick arch bridge "Megane Bridge" (designated as an important cultural property)
Former Maruyama Substation ・Apton Road (brick tunnel, etc.)

-Gunma Safari Park (23 minutes by car)

-Tomioka Silk Mill <National Treasure and World Cultural Heritage Site> (20 minutes by car)

-Karuizawa Outlet (40 minutes by car)

Accommodation Plans and Rates
The basic rate is from 5,100 yen per night, including tax, for an adult, weekday, with two meals. 
If you would like to add a meal or bring your children, please select from the separate options.
The amount shown includes the bath tax.
If you have any questions, please feel free to contact us.

About pets
 Please note that pets are not allowed in the hotel.

About the room
 An eight-mat Japanese-style room is spacious enough for two people.
 The room has a traditional alcove.

There is no bathroom or toilet in the room.
There are no bathrooms in the rooms. Please use the onsen baths and shared toilets. Please use the onsen baths in the hotel for bathing and the shared restroom for toilets. If you are coming in a group, please use the hall instead of your room for chatting.

About the hot springs at Isobe Ryokan
 Composition of the hot spring: Sodium, chloride, bicarbonate strong salt (high-tension neutral high spring)
 Because it is a source of hot spring water, the ingredients are dense and easily permeate the body, making it a highly effective type of hot spring.
 The water is soft and gentle on the body.

Bathing hours: 24 hours
 No hair dyeing
 Bathing after drinking is prohibited.
 Please be careful not to leave the water faucet on.

Check-in: 15:00- (No late night check-in)
Check-out time: ~10:00 (Early morning check-out is possible)



(Not include taxes and fees)
  • Add Breakfastper person
    ¥1,800 /Person
  • Add Dinnerper person
    ¥3,000 /Person
  • Add Breakfastper person
    ¥3,700 /Person
  • Child rate (4-12 years old)no meals
    ¥3,600 /Person
  • Child rate(4-12 years old)add breakfast
    ¥4,600 /Person
  • Child rate(4-12 years old)add dinner
    ¥5,300 /Person
  • Child rate(4-12 years old)add breakfast and dinner
    ¥5,700 /Person
  • Child rate (0~3 years old)child rate with breakfast
    ¥1,400 /Person
  • Child rate (0~3 years old)child rate with dinner
    ¥2,600 /Person
  • Child rate (0~3 years old)child rate with breakfast and dinner
    ¥3,800 /Person


Room type
Private Room
Traveler number
No bed


1) Japanese-style room: 2 futons / 2 guests
2) Japanese-style room: 2 futons / 2 guests
3) Japanese-style room: 2 futons / 2 guests



Host Approval
Minimum nights
1 night
Maximum nights
30 nights


When chatting with your friends or family, please do so in the hall !




  • Bathtub
  • Air Conditioning
  • TV
  • Fridge
  • Washing Machine
  • Microwave Oven
  • Hair Dryer
  • Wireless Internet
  • Bed/Futon


- Fire Alarm - Fire Extinguisher


  • Face Towel
  • Bath Towel
  • Bed Sheets
  • Bath Mat
  • Hand Soap
  • Hand Sanitizer
  • Disposable Mask
  • Body Soap
  • Shampoo
  • Conditioner
  • Detergent
  • Tableware
  • Kitchenware
  • Toothbrush
  • Pajamas
  • Hangers


- Waste Basket


  • Rooms Have Been Sanitized
  • Ventilation
  • Free Parking
  • Luggage Storage
  • Coronavirus Precautions


Daily price
Weekend price
Cleaning fee
Free of charge
1 week discount
Not set
2 week discount
Not set
Monthly discount
Not set
Additional cost per person
¥5,700/night(with tax) From the first 2 people
Weekend additional cost per person
¥6,900/night(with tax) From the first 2 people

The actual price may differ from the rates above, due to date or season of reservation. Consumption tax and service fees will be charged separately.
The “Total (Tax included)” displayed after entering the check-in and check-out dates and the number of guests already includes consumption tax and service fees. No additional charges will be added until the reservation is approved.


  • More than 8 days ago :0%
  • 7 days before 〜 6 days before :10%
  • 5 days before 〜 4 days before :20%
  • 3 days before 〜 2 days before :20%
  • 1 day before :50%
  • The day :80%
  • No-show :100%


You can pay only by credit card.
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142yrs. Old House "Kojimaya Ryokan"


Annaka shi Gunma


It takes 20 minutes by taxi from Hokuriku Shinkansen Annakaharuna Station.
It takes 7 minutes on foot from JR Shinetsu Main Line isobe Station.



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