A completely private space with no contact, offering the luxury of 'nothing'... A 130-year-old 'earthen storehouse' renovated into a one-building rental inn with a sauna. Enjoy luxurious moments with your family, friends, and pets through campfires, BBQs, and a private sauna. [Nagano City Ooka (formerly Ooka Village)] Nagano City Ooka, located at an altitude of approximately 1,000m, where remnants of rural ironworks remain. From the traditional countryside and village, you can enjoy a panoramic view of the Northern Alps during the day and a breathtaking starry sky at night. [Concrete Sauna CUBERU] A sauna 'CUBERU' (Kubelu) that combines high design quality, durability, and heat-retention properties unique to concrete. Experience a unique and new sauna in the midst of nature, just the way you want. *Please light the wood stove yourself. [ReFa Room] Experience the trending products in the 'ReFa Room' We offer a luxurious stay where you can refresh both body and mind while enjoying ReFa's beauty treatments in a high-quality relaxation space. [Ooka Onsen] Enjoy the magnificent view of terraced rice fields and the Northern Alps from the large windows of the open-air bath and indoor bath at 'Ooka Onsen' You can use it for free during your stay. *Please check the operating days and hours in advance before use.