Discovery of Hirayu Onsen.
-Tale of Shirozaru (white monkey)-
"Long ago, about four hundreds and fifty years ago, exhausted soldiers from the land of Kai who just attacked in to Hida found their way to Hirayu Great Falls at last. As they were looking at the waterfalls blankly, an old white monkey came down from behind the waterfalls and it led the soldiers to a hot spring in the mountain." It said that was how people discovered the Hirayu Onsen.