OSTERIA SINCERITA
One Michelin Key

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Expert Review: OSTERIA SINCERITA
OSTERIA SINCERITA in Nanyo, Japan, a distinguished One Michelin Key property, consistently receives overwhelmingly positive feedback, lauded as an exceptional auberge offering a unique blend of Italian gastronomy and Japanese hospitality amidst the serene Okitama Valley.
1. Overall Rating & Sentiment
OSTERIA SINCERITA garners an outstanding reputation, described as "a very special stay" by the Michelin Guide. Guest reviews consistently award it top marks, with ratings as high as 4.96 out of 5.00 on platforms like Ikyu.com. The sentiment is overwhelmingly positive, with guests calling it "undoubtedly the No.1 outstanding accommodation" and "an enchanting auberge worth a five-hour journey to visit again and again!".
2. Key Highlights
Guests are particularly enchanted by the intimate experience offered by this three-room inn, combined with the exquisite Italian cuisine prepared by a Michelin-starred chef. The hotel's setting in Yamagata's Okitama Valley, known for its clean mountain air and seasonal produce, is a significant draw. The unique amenity of private open-air onsen baths in every room, coupled with saunas in some suites, stands out. The modern design, tranquility, and the presence of a fire pit further enhance the guest experience.
3. Room Quality
OSTERIA SINCERITA offers just three meticulously designed rooms, each a spacious maisonette-style retreat. Rooms are exceptionally large, with "Grano" measuring 135 square meters and "Monte" 150 square meters, each featuring two bedrooms. A highlight in every room is the private open-air onsen bath crafted from cypress wood, fed by "freshly sourced Onsen". Two of the rooms also boast private saunas (Monte includes a steam sauna, and Alba a dry sauna, while Grano does not have a sauna). Guests appreciate the luxurious and comfortable atmosphere, akin to a private villa, with thoughtful touches like heated wooden floors. The modern design contributes to a quiet and relaxing ambiance.
4. Dining Experience
The dining experience at OSTERIA SINCERITA's restaurant, "Stanza della SINCERITA," is a major draw. Chef Makoto Harada, a highly acclaimed Italian chef and recipient of Michelin and Gault Millau awards, personally crafts course meals in a live kitchen setting. The cuisine focuses on seasonal local ingredients from the Okitama Valley, including renowned Yonezawa beef, housemade pasta, and dry-aged heifer cuts. Guests describe the dishes as "memorable masterpieces" and some even state that the Italian cuisine "surpasses even Michelin-starred restaurants in Tokyo". Breakfast also features unique local adaptations, such as a lighter version of the traditional Yamagata stew, imoni.
5. Service & Staff
The hospitality at OSTERIA SINCERITA receives glowing praise. Guests consistently commend the staff for their excellent, friendly, yet formal demeanor. The team, including the chef himself, is noted for their engaging and sometimes playful interactions, even incorporating "magic tricks," creating a very enjoyable atmosphere. This "timeless hospitality that never changes" contributes significantly to the overall satisfaction of the guests.
6. Location & Accessibility
Located at 3005 Akayu, Nanyo, Yamagata, the hotel is nestled in the picturesque Akayu Onsen area within Yamagata's Okitama Valley. While offering a tranquil escape, it remains accessible, approximately an 8 to 10-minute drive or taxi ride from JR Akayu Station. The hotel provides a complimentary pick-up service from Akayu Station with prior reservation. Although it is about two and a half hours from Tokyo, guests note that the change of pace is a welcome part of the experience. Nanyo is also considered a convenient base for exploring attractions in Yamagata, Fukushima, and Miyagi prefectures.
7. Value & Pricing
OSTERIA SINCERITA is a luxury experience, reflected in its pricing. For non-staying diners, a dinner menu is approximately ¥33,000 ($220). A one-night stay including two meals typically ranges from ¥77,000 to ¥110,000, with some packages for two people starting around ¥169,400 (tax included). While on the higher end, the consistent high praise for the unique amenities, exceptional dining, and personalized service suggests that guests perceive it as a worthwhile and premium experience.
8. Common Complaints
Finding common complaints for OSTERIA SINCERITA is challenging due to the overwhelmingly positive feedback. The Michelin Guide, while awarding it a key, noted "No verified stays yet" for guest scores and reviews on their platform, which could indicate its newness or exclusive nature limiting the volume of public reviews through certain channels. It is also important to note that the property is non-smoking, including on room terraces, and lacks elevators or wheelchair ramps, which could be a consideration for some guests. However, there are no recurring criticisms regarding service, room quality, or dining found in available guest feedback.
Sources
About One Michelin Key
One Michelin Key is awarded to hotels that offer a very special stay. These properties are characterized by their unique personality, high quality, and ability to create memorable experiences for guests.

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