The oldest hot spring district in the Okuhida Onsenkyo hot spring village sprawling at the foot of Mt. Norikura. According to the Hishushi written at the end of the Edo period, the area was discovered when the mighty lord Takeda Shingen invaded the Hida region and happened to follow an old, white monkey to a hot spring. There are some 40 source springs in the district, and, depending on the location, visitors can enjoy a variety of hot spring qualities, including hydrogen carbonate springs, chloride springs, sulfur springs, and simple springs. Located close to Kamikochi and Mt. Norikura, the district is also used as a base for mountain climbing activities. Hantai eggs, boiled eggs with firm yolks and soft whites, are a popular local specialty made using the area's high temperature hot spring waters, which reach up to 90 ° C.