Omaru Onsen (Omaru Onsen Ryokan)
Located at the foot of Mt. Chausu at an altitude of 1,300 meters, Omaru Onsen Ryokan has been preserved by generations of innkeepers for over 200 years. Rich in metasilicic acid, the spring water is known for its moisturizing properties and is often called “Bijin-yu” (Beauty Hot Spring). The historic Kawa-no-Yu bath draws its water directly from the river source, where hot spring water gushes from the mountainside to form an open-air bath along the river. Here, guests can soak while listening to the gentle murmur of the stream, enjoying the secluded charm of this hidden onsen. Omaru Onsen’s water, abundant in metasilicic acid, has long been treasured for its skin-beautifying effects. The ryokan features mixed open-air baths such as Shirakaba-no-Yu, Ajisai-no-Yu, and Azami-no-Yu, making it a great choice for families. The on-site restaurant serves local Nasu vegetables, Tochigi Wagyu beef shabu-shabu, and “Nasuhikari” rice produced in Tochigi. Sake enthusiasts can also try shochu diluted with hot spring water. During the Meiji period, General Nogi Maresuke visited Omaru Onsen every year for convalescence. The ryokan’s lobby still displays valuable artifacts, including his clothing, diaries, and letters.