From the ancient times, the Nageshi-yu and Nigiishi Onsen are also known as the One night Hot Spring. The former hot spring was built in another place. Legend says that when the owner was digging a hot spring on a purchased land, a good quality spring came out. One night, he was thinking about how to use it and when he woke up, a little wooden spa was built overnight on the site. That is why it was called the "One night hot spring"