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.
Because I live in Kanagawa and this area is so close, I had never looked for Accommodation around here before. Thanks to IKYU, I was able to discover such a wonderful Accommodation so nearby. Although I had seen some comments from other guests complaining about the staff’s service, every member of the team provided warm, hospitality-filled service without exception, and I truly enjoyed my stay in the best possible mood. This is a very quiet Accommodation with only 16 Rooms, and there are Onsen not only in the Rooms but also private baths and a large public bath. The meals were plentiful and well balanced; we were delighted to enjoy grilled char (iwana) with salt and Koshu beef as well. The road leading to the Accommodation is narrow, but as it is the only property there, it felt like a hidden hot spring retreat—absolutely wonderful. Even in this time of labor shortages, an elderly staff member kindly took care of us attentively until the very end. Knowing how demanding it must be late at night and early in the morning left me deeply impressed. They even saw us off until we were completely out of sight. I would love to visit again; however, we were told that only 8 of the 16 Rooms are currently in operation, making Reservations difficult to secure. I am truly grateful for an unforgettable trip accompanied by the soothing sound of the river flowing throughout the night.
barimae 6/29/2026Every year, we look forward to visiting for the baths and meals. The cherry blossoms had started to bloom, and the garden view was lovely.
KotoMa 3/31/2026
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 |
|
| Open-air bath |
|
| Private bath |
|
| Room with Open-Air Bath |
|
| 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
- Facility3.85
- Hospitality & Service4.50
- Meals4.56
- Onsen & Bath4.41
- Satisfaction4.44
*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 a Sanga Kaiseki Meal] Carp Raised in Pristine Waters](https://www.img-ikyu.com/contents/common/image/acc1/00002761/0/org/11600011.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)
