The present-day Yunohana-onsen was established through the rediscovery of the springhead through a survey conducted based on ancient documents that mentioned busho (Japanese military commander) during the Sengoku period visiting the hot spring to be cured.
現代の湯の花温泉は、戦国武将が湯治に訪れたという古文書に基づいて調査が行われ、源泉が再発見されたものである。