A hidden Onsen Accommodation in Kai, where every room features an open-air bath and the soothing sound of a clear stream.
Kai's renowned hot spring "Maki Onsen" is an Onsen located in a mountain village where hot water springs forth. The guest rooms, exuding the warmth of wood, are constructed in an elegant Sukiya style using premium cedar and cypress throughout. All rooms face the river, allowing you to rest comfortably with the sound of the stream as your pillow.
Late on a Friday in mid-September, my wife and I decided to spend the weekend at a quiet, rustic Onsen, so we searched on IKYU. We couldn’t go too far, so at first we looked into Kofu and Isawa along the Chuo Expressway. Then we found an Accommodation with photos of a stunning entrance—turns out it’s in Otsuki, a place we usually just pass by (sorry!). I hesitated for a moment after reading in a Review that there’s a narrow forest road on the way to the Accommodation (laugh), but I felt drawn to it and made a Reservation. After actually visiting—absolutely the right choice! It was exactly as I had imagined, and we were very satisfied with both the Onsen and the meals. In particular, given its riverside mountain setting, the salt-grilled char was outstanding. The choice of ingredients that matched the location truly impressed me. It felt like an adults-only hideaway, and the staff’s thoughtful sense of distance—attentive without being intrusive—was wonderful. My wife and I are already talking about coming back in another season. Thank you very much for everything.
なかてぃはま 9/27/2026I had read the information in advance, but the road to the Accommodation was quite narrow, which made me a little uneasy. Since there are two routes, if you’re concerned, it might be a good idea to contact the Accommodation beforehand and ask. However, from the moment I arrived and saw the entrance gate, I was truly impressed by its charming atmosphere. At reception, I was happy to be greeted so politely. It was rainy and chilly, but they warmed up my Room and even provided a hanten jacket—such warm hospitality. Both dinner and breakfast were very delicious, and I finished everything. After breakfast, I enjoyed the coffee service across the bridge on foot. The Onsen was great—not only in the Room but also with private baths that we could enjoy. Thank you very much.
ぱるんちゃん 9/12/2026
Facilities and Services
See All- Hot spring
- Room with Open-Air Bath
| IN | 15:00~17:30 |
|---|---|
| OUT | 10:00 |
| Number of rooms | 16 rooms |
| Pet | Not allowed |
| Your child | Not allowed |
| Please note that we do not accept reservations for guests with children of elementary school age or younger. |
Photo
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Introduction of the Accommodation
Facilities and Equipment of Accommodation
- The room
- Hot Springs & Baths
- Facilities & Services
- Meal
Basic Information
| Card information | Credit card payments not accepted on site. |
|---|---|
| Pets | Not allowed |
| Breakfast | There is no information about breakfast. |
| Your child | You cannot stay. Please note that we do not accept reservations for guests with children of elementary school age or younger. |
| Room service | Not available |
| Common amenities |
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| Facilities and Features |
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| Esthetic Massage | None |
| Fitness gym | None |
| Public Bath |
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| Open-air bath |
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| Private bath |
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| Room with Open-Air Bath |
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| Spring quality and benefits | Alkaline Simple Sulfur Cold Mineral Spring Joint pain / Neuralgia / Diabetes |
| Sauna | None |
| Hot stone spa | None |
| About Hygiene Measures | Following the reclassification of COVID-19 to a Category 5 infectious disease in Japan, we have eased some strict measures; however, we continue to implement basic infection prevention measures such as staff wearing masks, providing alcohol-based hand sanitizer, and ensuring proper ventilation throughout the property. |
Reviews
- Rooms & Amenities4.03
- Facility3.86
- Hospitality & Service4.51
- Meals4.57
- Onsen & Bath4.43
- Satisfaction4.46
*Reviews that have been translated from Japanese.*
*Showing only reviews from 一休.com (Japanese) and Yahoo!トラベル.*
Access Information
Yamanashi Prefecture5353 Maki, Otsuki-machi, Otsuki City
TEL:+81-554-22-0146
[For Guests Arriving from the Tokyo Area]
■ By Car
Take the Chuo Expressway toward Otsuki → Exit at Otsuki IC, then head toward Kofu → Turn right at the first pedestrian overpass, cross the bridge over the Chuo Expressway, then turn left.
*For details, please see “Others” in the Photo Gallery.
*If using a car navigation system, it may guide you onto narrow roads—please take care.
■ By Public Transportation
Get off at Otsuki Station (JR Chuo Main Line). Shuttle Service available (advance Reservation required).
[For Guests Arriving from the Nagoya Area]
■ By Car
Take the Chuo Expressway via Okaya JCT toward Kofu → Exit at Otsuki IC, then head toward Kofu → Turn right at the first pedestrian overpass, cross the bridge over the Chuo Expressway, then turn left.
■ By Public Transportation
Via Tokyo, get off at Otsuki Station (JR Chuo Main Line). Shuttle Service available (advance Reservation required).
- Parking Information
- Fee
- Free for guests
- Parking time
- ---
- Parking space
- No restrictions
- Number of parking spaces
- 50 cars available outdoor
- Valet service
- Unavailable
- Pickup and drop-off information
- Available (Free)■Shuttle Service Available (Conditions Apply)
*A Shuttle Service from JR Otsuki Station is available at 14:30 / 15:30 / 16:30. Advance Reservation is required, so please inform us by the day before if you wish to use this service.
*The return Shuttle Service departs from the property at 10:00.
*For all other times, please use a taxi.
Frequently Asked Questions
Please provide information about Open-air bath.
・Hot spring: Available ・Free-flowing: None ・Cloudy hot spring water: None ・Supplementary information: (Heating, Adding Water) Large public bath: Open 24 hours (except during cleaning from 9:30 to 11:00).
What are the qualities and benefits of the hot spring water?
The spring quality and efficacy of the hot spring are as follows. ・Spring quality: Alkaline Simple Sulfur Cold Mineral Spring ・Spring efficacy: Joint pain / Neuralgia / Diabetes
What kind of facilities and features are available?
There are the following facilities and features. Hot spring・Rooms with open-air baths available・Open-air bath・Large public bath・Private bath・Free shuttle service
I would like to know the access information.
[For Guests Arriving from the Tokyo Area] ■ By Car Take the Chuo Expressway toward Otsuki → Exit at Otsuki IC, then head toward Kofu → Turn right at the first pedestrian overpass, cross the bridge over the Chuo Expressway, then turn left. *For details, please see “Others” in the Photo Gallery. *If using a car navigation system, it may guide you onto narrow roads—please take care. ■ By Public Transportation Get off at Otsuki Station (JR Chuo Main Line). Shuttle Service available (advance Reservation required). [For Guests Arriving from the Nagoya Area] ■ By Car Take the Chuo Expressway via Okaya JCT toward Kofu → Exit at Otsuki IC, then head toward Kofu → Turn right at the first pedestrian overpass, cross the bridge over the Chuo Expressway, then turn left. ■ By Public Transportation Via Tokyo, get off at Otsuki Station (JR Chuo Main Line). Shuttle Service available (advance Reservation required).
Is parking available?
・Fee: Free for guests ・Parking space: Length --- Vehicle width --- Vehicle height --- ・Number of parking spaces: 50 cars ・Valet Service: Unavailable No Reservation Required
Please provide information about Private bath.
・Hot spring: Available ・Free-flowing: None ・Cloudy hot spring water: None ・Supplementary information: (Heating, Adding Water) Private open-air bath: 3:00 PM–12:00 AM, 6:00 AM–9:30 AM
Is an internet connection available?
Connection is possible. ・Wi-Fi is available. For more details, please refer to the room and plan information.
What kind of hygiene management is being conducted?
Following the reclassification of COVID-19 to a Category 5 infectious disease in Japan, we have eased some strict measures; however, we continue to implement basic infection prevention measures such as staff wearing masks, providing alcohol-based hand sanitizer, and ensuring proper ventilation throughout the property.
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![[Main Building] Clear Stream Pavilion](https://www.img-ikyu.com/contents/common/image/acc1/00002761/1/org/11599827.jpg?auto=compress,format&lossless=0&fit=crop&w=200&h=200&q=30)

![[Example of Sankai Kaiseki Cuisine] Fresh sashimi and more](https://www.img-ikyu.com/contents/common/image/acc1/00002761/0/org/11600005.jpg?auto=compress,format&lossless=0&fit=crop&w=200&h=200&q=30)






![[Main Building] Clear Stream Pavilion](https://www.img-ikyu.com/contents/common/image/acc1/00002761/1/org/11599827.jpg?auto=compress,format&lossless=0&w=560&h=370)
