A private open-air bath (free of charge) that is popular at a hidden hot spring inn in a secluded area of a national park rich in nature. Nostalgic yet new "Itamuro Bettei" where modern and retro come and go in Itamuro Onsen, Nasu, which is famous as a hot spring resort. Located on the outskirts of the city center, there are only lush green trees and a river flowing under the hotel. It is a single-family inn surrounded by nature and silence with a calm environment like no other. Our hot spring is a natural hot spring that flows directly from our own source. There are two open-air baths with different tastes that can be reserved for free, and an indoor bath that can be used 24 hours a day. You can relax in the open-air bath surrounded by lush nature.