Motoyu Geto is a remote mountain inn located at an elevation of approximately 650-700 meters on the western slopes of Mount Koma in the Yakeishi mountain range, Iwate Prefecture. This secluded hot spring is a member of the Japan Secret Hot Springs Association (Nihon Hitou wo Mamoru Kai). The onsen has a history spanning over 850 years, with two legendary origin stories: one attributes its discovery to the monk Jikaku Daishi in 856, while another tells of Matagi hunter Takahashi Shiroemon who in 1375 discovered a wounded white monkey bathing in the hot springs. During the Edo period, Geto Onsen was ranked as the Eastern Grand Champion (Ozeki) in hot spring rankings, and historical records from 1747 show that the layout of the bathhouses remains essentially unchanged to this day. The name Geto is believed to derive either from the Ainu word Gutto-O meaning place with a cliff, or from summer hot water (natsu-yu) as the area becomes inaccessible in winter, with yu (hot water) later changing to abura (oil) as the water shimmered like oil in summer sunlight. Seven different natural hot spring sources flow directly from the bedrock along the Geto River, creating seven distinct bathing pools: Oyu (Large Bath), Taki-no-yu (Waterfall Bath), Senki-no-yu (Colic Bath), Ma-yu (True Bath), Me-no-yu (Eye Bath), Hakuen-no-yu (White Monkey Bath), and Kotengu-no-yu (Small Goblin Bath). All baths are 100% natural free-flowing hot springs (gensen kakenagashi) with water bubbling directly from foot springs (ashimoto jifunsen), a rare phenomenon found in only a few dozen locations throughout Japan. The hot springs flow without any artificial intervention, maintaining their pristine natural state. Upstream from the inn stands Tengu-no-Iwa (Goblin Rock), Japans largest limestone travertine dome measuring 17.6 meters tall with a base diameter of 25 meters, designated as a Special Natural Monument in 1957 (currently closed to visitors due to typhoon damage in 2016). The onsen operates seasonally from early May to mid-November, closed during winter months when snowfall reaches up to 7 meters. Surrounded by pristine beech forests, this mountain retreat offers guests the unique opportunity to experience seven different natural hot spring sources, making it a true hot spring paradise beloved by onsen enthusiasts across Japan. The facility includes both traditional inn accommodations and self-catering lodging.