The history of Onsen, a natural hot water spring, traces back to ancient times, with references found in the oldest Japanese text, the "Kojiki," dating back to the 8th century. According to legend, the mythical deity Izanagi used hot water to cleanse himself after returning from the underworld. This cleansing act is believed to have given birth to the first Onsen, symbolizing purification and spiritual rejuvenation.






