Studying Yufuin Spa and Kurokawa Spa which have been prosperous for a long time tells us that soothing scenery with surroundings full of various plants and fields is evidently important for onsen-ryokan business.
由布院温泉、黒川温泉など、繁栄を続けている温泉地を見れば、植栽や林野に富む風景など、情趣の感じられる景観の重要性は明らかである。