The name Oita of Oita Prefecture, where KAI Yufuin is located, derives from words that mean “grand rice field” and is an area associated with rice fields and rice terraces. There are rice terraces in the Yufuin area, which is located between mountains, and there used to be rice terraces where KAI Yufuin now stands. This hot spring ryokan is nestled in a quiet location overlooking Mt. Yufu, and is located in Yufuin Onsen, which has one of the highest number of hot spring sources and spring water in Japan. Rice terraces, one of Yufuin’s original landscapes, is recreated in the center of the premise and aims to become an accommodation where guests can enjoy the seasonal changes of the rice terraces. For example, the reflection of the clear blue sky on the water before planting rice, the fresh green leaves just after planting, the golden color of the ear of rice that spreads, and the rice straw in late autumn, etc. This ryokan built around the rice terraces was designed by Kengo Kuma. A relaxing hot spring stay can be enjoyed as one feels the charms of the area such as its rich nature and rural village landscapes.