Rich effects that have not changed since old time Pale green cloudy water that changes its expression every day Okunikko Yumoto Onsen a completely free-flowing natural hot spring Oku-Nikko Yumoto Onsen was first discovered in 788 by Shodo Shonin, the founder of Nikko.
Shugendo (mountain asceticism) became popular on Mt. Nikko, and during the Muromachi period (1336-1573), hot springs were emphasized and therapeutic baths were developed. The rich efficacy of the hot springs made Yumoto Onsen a sacred place that attracted more attention in terms of religious beliefs.
In the Edo period (1603-1867), when Toshogu Shrine was established, the Tokugawa Shogunate appointed "yumamori," or guardians of the hot springs, and opened itaya, or bathhouses, to accommodate tourists.
In the Showa period (1926-1989), it was designated as the first national recreational hot spring resort due to the quality of its therapeutic springs, the abundant amount of water gushing from the springs, and the scenic beauty of the surrounding area, and it has flourished.
Nowadays, it is a well-known hot spring that anyone can bathe in and is used by many people.