Main Building Guest Room “Executive Room”
Room Introduction
「行政套房」是本館中最寬敞的客房，擁有40㎡的寬闊空間，配備四張加大單人床與舒適沙發。無論是情侶、夫妻想享受奢華時光，或是家庭、朋友團體入住，都能自在放鬆。
【房型資訊・設備】
- 面積：40㎡
- 床型：Simmons席夢思加大單人床2張＋單人床2張
- Siiv三人座沙發、60吋大螢幕電視
- 盥洗台、洗手間
- 製冰桶、原創花草茶、點心
Services & Facilities
- Wi-Fi available
- Pickup and drop-off service available
- In-room bath available
IN 15:00 / OUT 10:00
About Kamosumori
The concept of the inn is “Brewing You.” Just as rice and koji meet to create sake, the owners hope that encounters with local sake, people, and this land will inspire something new to slowly grow and ferment within each guest. This idea is reflected throughout the property—homemade miso is prepared in the basement, and the neighboring brewery produces craft sake, allowing guests to experience Japan’s fermentation culture firsthand.
Kamosu Mori was produced by Yuichi Yamagishi, a certified Sake Master (Sakesho), wine sommelier, an
From the welcome drink at check-in, your special experience begins. Guests are treated to an unforgettable stay, where local ingredients, creative cuisine, and Niigata’s exceptional sake come together in the heart of nature.
Dinner
Dinner at Kamosu Mori is a creative course meal that showcases the best of local ingredients. The current menu is based on Italian cuisine, featuring seasonal mountain vegetables, locally grown produce, seafood from the nearby Sea of Japan, and premium regional meats.
Non-alcoholic options such as mocktails and local fruit juices are also available, making the dining experience enjoyable for all guests.
A Happy Hour service is offered exclusively to guests from 3:00 p.m. to 5:00 p.m., where drinks such as beer and wine can be enjoyed at a special price—perfect for relaxing after a bath.
Hot Spring
Matsunoyama Onsen is considered one of Japan’s Three Great Medicinal Hot Springs, along with Arima and Kusatsu. Its water is known for its high salt content and strong healing properties. On the first floor of Kamosu Mori’s main building, guests can enjoy this famous hot spring at the large communal bath called “Jōmon no Yu.” The bath is separated by gender and features large windows where you can relax while taking in views of the surrounding greenery during the day.
The hot spring at Matsunoyama is a chloride spring (sodium-calcium chloride) with a very high concentration of salt. This is because the water originates from “fossil seawater,” ancient seawater from around 10 million years ago that became trapped underground. The mineral-rich water is so dense that salt crystals form around the spouts. Thanks to its high salt content, the water retains heat well—your body stays warm long after bathing, and your skin feels soft and moisturized.
The bath area is equipped with all essential amenities such as shampoo, conditioner, body soap, facial wash, and hair dryers. From the windows, you can also enjoy peaceful mountain views.
Although Kamosu Mori is located slightly away from the main hot spring town, the water is piped directly from Matsunoyama Onsen. Besides the large communal bath in the main building, there are no other public hot spring baths. However, guests staying in the villa or certain rooms with a view bath can enjoy a private soaking experience (note: these room baths are not hot spring water).
Shared shower rooms are also available. Shampoo, conditioner, and body soap are provided, and the showers are separated by floor—men on the 1st floor, women on the 2nd floor—so you can use them comfortably and securely.
Rooms
Kamosu Mori offers a total of 9 rooms: eight Western-style rooms in the main building and one private villa located separately within the forest. Each room type has its own unique character, allowing guests to choose the perfect stay—whether for couples, families, groups, or solo travelers.
All rooms are non-smoking, equipped with free Wi-Fi, and guests have access to a complimentary washing machine and dryer in the shared area, making it ideal for longer stays. With only eight rooms in the main building, the atmosphere is quiet and private, and many guests appreciate being able to spend their time without encountering other travelers. This peaceful and spacious environment is one of the charms of Kamosu Mori.
Plan List
This service uses a reservation request system. After we check room availability with the accommodation, we will propose the most suitable room and plan for you.Once availability is confirmed, we will send you our proposal via LINE, and your reservation will be finalized upon completion of payment.
Breakfast Plan – No Dinner（Hotel Kamosu Forest）
Check-in 15:00 / Check-out 10:00
- オンラインカード決済
食事あり
Total
19,800/人
JPY ~
Recommended Rooms
Private Villa “Mori no Bettei”
Room Introduction
Opened in June 2023, this villa offers a private retreat that feels just like your own vacation home.
Limited to one group per day, the two-story villa is located slightly apart from the main building.
The first floor features an open-air BBQ space with a sofa and table, while the second floor offers a relaxing living area and an open-air cypress bath overlooking the surrounding mountains and forest.
Guests can enjoy dinner in the main dining area, or bring their own ingredients to enjoy a private BBQ experience.
[Room Size & Facilities]
- 95㎡ (total for both floors)
- 4 Simmons semi-double beds (2 of them are bunk beds, accessed by ladder)
- Washbasin, toilet, rain shower, open-air cypress bath
Room Only Plan – No Meals（Hotel Kamosu Forest）
Check-in 15:00 / Check-out 10:00
- オンラインカード決済
食事なし
Total
10,100/人
JPY ~
Recommended Rooms
Main Building Guest Room “Executive Room”
Room Introduction
「行政套房」是本館中最寬敞的客房，擁有40㎡的寬闊空間，配備四張加大單人床與舒適沙發。無論是情侶、夫妻想享受奢華時光，或是家庭、朋友團體入住，都能自在放鬆。
【房型資訊・設備】
- 面積：40㎡
- 床型：Simmons席夢思加大單人床2張＋單人床2張
- Siiv三人座沙發、60吋大螢幕電視
- 盥洗台、洗手間
- 製冰桶、原創花草茶、點心
Private Villa “Mori no Bettei”
Room Introduction
Opened in June 2023, this villa offers a private retreat that feels just like your own vacation home.
Limited to one group per day, the two-story villa is located slightly apart from the main building.
The first floor features an open-air BBQ space with a sofa and table, while the second floor offers a relaxing living area and an open-air cypress bath overlooking the surrounding mountains and forest.
Guests can enjoy dinner in the main dining area, or bring their own ingredients to enjoy a private BBQ experience.
[Room Size & Facilities]
- 95㎡ (total for both floors)
- 4 Simmons semi-double beds (2 of them are bunk beds, accessed by ladder)
- Washbasin, toilet, rain shower, open-air cypress bath
Standard Plan – No Alcohol Included（Hotel Kamosu Forest）
Check-in 15:00 / Check-out 10:00
- オンラインカード決済
食事あり
Total
33,000/人
JPY ~
Recommended Rooms
Main Building Guest Room “Executive Room”
Room Introduction
「行政套房」是本館中最寬敞的客房，擁有40㎡的寬闊空間，配備四張加大單人床與舒適沙發。無論是情侶、夫妻想享受奢華時光，或是家庭、朋友團體入住，都能自在放鬆。
【房型資訊・設備】
- 面積：40㎡
- 床型：Simmons席夢思加大單人床2張＋單人床2張
- Siiv三人座沙發、60吋大螢幕電視
- 盥洗台、洗手間
- 製冰桶、原創花草茶、點心
Private Villa “Mori no Bettei”
Room Introduction
Opened in June 2023, this villa offers a private retreat that feels just like your own vacation home.
Limited to one group per day, the two-story villa is located slightly apart from the main building.
The first floor features an open-air BBQ space with a sofa and table, while the second floor offers a relaxing living area and an open-air cypress bath overlooking the surrounding mountains and forest.
Guests can enjoy dinner in the main dining area, or bring their own ingredients to enjoy a private BBQ experience.
[Room Size & Facilities]
- 95㎡ (total for both floors)
- 4 Simmons semi-double beds (2 of them are bunk beds, accessed by ladder)
- Washbasin, toilet, rain shower, open-air cypress bath
Japanese Sake Pairing Plan – Dinner & Breakfast Included（Hotel Kamosu Forest）
Check-in 15:00 / Check-out 10:00
- オンラインカード決済
食事あり
Total
38,280/人
JPY ~
Recommended Rooms
Main Building Guest Room “Executive Room”
Room Introduction
「行政套房」是本館中最寬敞的客房，擁有40㎡的寬闊空間，配備四張加大單人床與舒適沙發。無論是情侶、夫妻想享受奢華時光，或是家庭、朋友團體入住，都能自在放鬆。
【房型資訊・設備】
- 面積：40㎡
- 床型：Simmons席夢思加大單人床2張＋單人床2張
- Siiv三人座沙發、60吋大螢幕電視
- 盥洗台、洗手間
- 製冰桶、原創花草茶、點心
Private Villa “Mori no Bettei”
Room Introduction
Opened in June 2023, this villa offers a private retreat that feels just like your own vacation home.
Limited to one group per day, the two-story villa is located slightly apart from the main building.
The first floor features an open-air BBQ space with a sofa and table, while the second floor offers a relaxing living area and an open-air cypress bath overlooking the surrounding mountains and forest.
Guests can enjoy dinner in the main dining area, or bring their own ingredients to enjoy a private BBQ experience.
[Room Size & Facilities]
- 95㎡ (total for both floors)
- 4 Simmons semi-double beds (2 of them are bunk beds, accessed by ladder)
- Washbasin, toilet, rain shower, open-air cypress bath
Access
1879-4 Matsunoyama Kurokura, Tokamachi City, Niigata 942-1341, Japan
By rental car from airports
- Narita Airport: approx. 3 hrs 40 min
- Niigata Airport: approx. 2 hrs 20 min
From Tokyo to Matsunoyama Onsen
Tokyo ➡︎ JR Joetsu Shinkansen to “Echigo-Yuzawa Station” ➡︎ about 14 min by car from “Matsudai Station”
Free Shuttle Service
- About 15 min by shuttle from “Matsudai Station” (advance reservation required)
- Pickup: departs Matsudai Station at 15:30
- Drop-off: departs Kamosu Mori at 9:45
Basic Information
Ryokan Name
Hotel Kamosumori
Address
1879-4 Matsunoyama Kurokura, Tokamachi City, Niigata 942-1341, Japan
Baths
| Water quality | Hypotonic, mildly alkaline cold mineral spring |
| Free-flowing hot spring | Free-flowing hot spring (available in some areas of the facility only) |
| Opening hours | 15:00~10:00 |
Facilities & Features
- ○Hot spring / Onsen
- △Free-flowing hot spring
- ×Open-air bath
- ○Large public bath
- ×Private bath
- ○Room with private outdoor bath
- ×Sauna
- ×Stone Sauna
- ×Within walking distance from the station
- ×Less than a 10-minute walk to a convenience store
- ○Free parking available
- ○Free shuttle service available
- ×Barrier-free
- ○Western-style rooms available
- ○Rooms with toilets
- ×Pets allowed
Common Amenities
- ○Hair dryer
- ○Shampoo & conditioner
- ○Body soap
- ○Toothbrush & Toothpaste
- ○Towels / Bath towels
- ○Yukata (Room Wear)
- ○Electric kettle
- ○Facial toner
- ○Face wash
- ○Moisturizer
- ○Refrigerator
- ○TV
- ○Hairbrush
- ○Washing machine
- ○Clothes dryer
Frequently Asked Questions
Are there any things I should be careful about when having a course dinner?
There’s nothing in particular to worry about.
There is no dress code, so please feel free to enjoy the dinner while chatting with your companions or the staff. We offer food and drinks that let you fully enjoy the flavors of Niigata.
What time is breakfast/dinner served?
Dinner (course dinner) is served in two sittings:
▷First sitting: 18:00～
▷Second sitting：19:45～
Dining time is approximately 100 minutes.
Breakfast (Japanese set meal) is served in the dining room between 8:00 and 9:00.
Can non-drinkers enjoy it as well?
If you enjoy nature and food, you can still have a great time even without alcohol.
However, since the hotel is themed around sake and other drinks, meals and free drinks during your stay are mainly centered on alcohol.
Some desserts may also contain alcohol, so please let us know in advance if you do not drink.
Are room wears provided in the hotel?
Yes.
We provide both yukata and samue (traditional Japanese work clothes) for guests to wear inside the hotel.
Should I avoid coming by car during winter?
We recommend coming by a 4WD car with winter tires.
The roads are cleared carefully, but not at night, so it’s best to arrive early.
If you’re worried, please contact us before your visit.
