Yunohana-onsen is said to be a hot spring made from the tears of an Oni which were closed by a numen of Cherry Stone, natural treasure, which was transformed into mica due to hydrothermal alteration of mineral called cordierite which was found here, and it is said that the custom to throw beans during Setsubun (Bean Throwing Night) was developed from the Cherry Stone.
この地で見つけることができる菫青石という鉱物が熱水変質を起こし雲母化した天然記念物の鉱石桜石の霊力によって封じられた鬼の涙が湧いたものが湯の花温泉であり、桜石が転じて節分の豆撒きの風習となったという伝承がある。