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- Yonezawa · Nanyo · Okitama Ryokan
- OSTERIA SINCERITA
Indulge in the "gastronomy" pursued in the rich land and the freshly born "Onsen" from the source.
2023 NEW OPEN! A three-room auberge Onsen Ryokan where you can enjoy freshly sourced Onsen with a focus on water quality and cuisine crafted by a Michelin-starred chef. All Rooms are over 135 square meters, featuring a maisonette style with two bedrooms and a private open-air Onsen bath made of cypress wood. Additionally, two Rooms are equipped with private saunas, offering a luxurious space for a carefree stay, akin to a private villa. The property includes a restaurant building, a private bath "Yumuro," and a fire pit, providing delightful experiences beyond the Rooms. The highlight is the dinner! At the live kitchen restaurant, the Michelin chef prepares a course meal right before your eyes, featuring seasonal local ingredients with creative presentations and exquisite flavors. From check-in to check-out, this Property offers an unforgettable experience that can only be found here.
I came to Yamagata for the first time because I wanted to stay here. Since it’s in the middle of town, I wasn’t sure what to expect—but once inside, it felt like a different world. It was quiet and relaxing, with a real sense of nature.The Room was wonderful—so spacious that it almost felt too big for two people—but we could truly unwind as if we were staying at a private villa. The Onsen water quality was also excellent and incredibly soothing.Above all, dinner was absolutely delicious and genuinely moving. Of course the chef’s skill is outstanding, but it also reminded me just how rich Yamagata’s food culture is. Because dinner is served at the counter in small numbers, it was great to hear directly from the chef, and it left a very positive impression to see how kind and close-knit the staff were. It was such an enjoyable dinner.I was a little surprised when the president came around to greet us. I also heard that at Takinami next door he makes soba every day for dinner—I’d love to try that someday as well. What a wonderful person.Although this is a luxury Accommodation, it also feels warm and welcoming—an extremely comfortable place to stay. I’d love to visit again in another season someday.
nekocafe 6/25/2026This is my third stay, and the Michelin-starred chef’s Italian cuisine surprises me every time with a different menu. It’s rare to find Italian food this outstanding even in Tokyo. Conversations with the staff are also enjoyable, making for a wonderful dinner time. Breakfast is equally exceptional, featuring local rice such as “Yumegokochi.” The Room is spacious, and Netflix is available without limits. The Onsen water quality is superb in both the private bath and the in-Room bath—an auberge with no flaws. I’m already looking forward to my next stay.
Fujisan 6/28/2026
Facilities and Services
See All- Hot spring
- Room with Open-Air Bath
- Spa facility
| IN | 15:00~18:00 |
|---|---|
| OUT | 11:00 |
| Number of rooms | 3 rooms |
| Pet | Not allowed |
| Your child | Not allowed |
| We do not accommodate children below elementary school age. |
Photo
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Introduction of the Accommodation






During the day, enjoy a welcome drink upon check-in. At night, gaze at the flames of the fire pit, conversing and losing track of time with the lingering taste of your meal. Under the Yamagata breeze, look up to admire the starry sky.
Facilities and Equipment of Accommodation
- The room
- Hot Springs & Baths
- Meal
Basic Information
| Card information | VISA / MASTER / JCB / AMEX / DINERS / UnionPay |
|---|---|
| Pets | Not allowed |
| Breakfast | At the restaurant, we offer Japanese cuisine. Enjoy freshly cooked rice made from delicious Yamagata rice and flavorful side dishes prepared with local ingredients from the Okitama region. 【About Breakfast Time】 Breakfast is served in two fixed sessions. 1. Starts at 8:00 AM 2. Starts at 8:30 AM ※ The start time can be chosen during check-in. |
| Your child | You cannot stay. We do not accommodate children below elementary school age. |
| Room service | Not available |
| Common amenities |
|
| Facilities and Features |
|
| Esthetic Massage | Available Limited to 3 groups per day, on a first-come, first-served basis.
[Oil Massage (Body)]
Customized massage tailored to your body type and condition.
60 minutes: ¥13,200 / 90 minutes: ¥19,800 (tax included)
[Facial Treatment (with Head Massage)]
Eliminates waste, cares for wrinkles, dullness, and swelling, providing total care for skin troubles.
60 minutes: ¥13,200 (tax included)
[120-minute Course Combining Body and Facial Treatments]
120 minutes: ¥26,400 (tax included)
*Rates may be subject to change during your stay at the Property. |
| Fitness gym | None |
| Private bath |
|
| Room with Open-Air Bath |
|
| Spring quality and benefits | Sulfur-Sodium-Calcium-Chloride Onsen (Hypotonic Neutral High-Temperature Onsen) Neuralgia, frozen shoulder, rheumatoid arthritis, bruises, cold sensitivity, decreased gastric function, fatigue recovery, atopic dermatitis, etc. ※Regarding the notation of "Gensen Kakenagashi" |
| Sauna | Available |
| Hot stone spa | None |
Reviews
- Rooms & Amenities5.00
- Facility4.95
- Hospitality & Service4.84
- Meals4.95
- Onsen & Bath5.00
- Satisfaction4.89
*Reviews that have been translated from Japanese.*
*Showing only reviews from 一休.com (Japanese) and Yahoo!トラベル.*
Access Information
Yamagata PrefectureNanyang City, Akayu 3005
TEL:+81-238-43-7800
Approximately 5 minutes by car from Akayu Station.
- Parking Information
- Fee
- Free for guests
- Parking time
- ---
- Parking space
- No restrictions
- Number of parking spaces
- 2 cars available outdoor
- Valet service
- Unavailable
- Pickup and drop-off information
- Available (Free)We operate a free Shuttle Service to and from Akayu Station twice daily during check-in and check-out times (Reservation required).
Please complete your payment at least 10 minutes before the Shuttle Service departure time during check-out.
■ Check-in: 14:30 departure from Akayu Station / 15:30 departure from Akayu Station
■ Check-out: 9:50 departure from Takinami / 10:50 departure from Takinami
For other times, please use a flat-rate taxi. Only Yamabato Kanko Taxi is available for the flat-rate service.
The fare from Akayu Station to Takinami is 870 yen (tax included). Arrangements can be made at the front desk.
Frequently Asked Questions
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: Sulfur-Sodium-Calcium-Chloride Onsen (Hypotonic Neutral High-Temperature Onsen) ・Spring efficacy: Neuralgia, frozen shoulder, rheumatoid arthritis, bruises, cold sensitivity, decreased gastric function, fatigue recovery, atopic dermatitis, etc.
What kind of facilities and features are available?
There are the following facilities and features. Hot spring・Rooms with open-air baths available・Free-flowing hot spring・Private bath・Sauna・Within a 5-minute walk to the convenience store.・Spa facility・Free shuttle service
I would like to know the access information.
Approximately 5 minutes by car from Akayu Station.
Is parking available?
・Fee: Free for guests ・Parking space: Length --- Vehicle width --- Vehicle height --- ・Number of parking spaces: 2 cars ・Valet Service: Unavailable
Please provide information about Private bath.
・Business Hours: 09:00~22:00 ・Hot spring: Available ・Free-flowing: Available ・Cloudy hot spring water: None ・Supplementary information: 100% natural hot spring Advance Reservation (Free) ※ First-come, first-served.
Is an internet connection available?
Connection is possible. ・Wi-Fi is available. For more details, please refer to the room and plan information.
Is there a sauna?
Yes, there is.
Do you have esthetic massages?
Yes, there is. Limited to 3 groups per day, on a first-come, first-served basis. [Oil Massage (Body)] Customized massage tailored to your body type and condition. 60 minutes: ¥13,200 / 90 minutes: ¥19,800 (tax included) [Facial Treatment (with Head Massage)] Eliminates waste, cares for wrinkles, dullness, and swelling, providing total care for skin troubles. 60 minutes: ¥13,200 (tax included) [120-minute Course Combining Body and Facial Treatments] 120 minutes: ¥26,400 (tax included) *Rates may be subject to change during your stay at the Property.
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