The History of Development Since the Showa Era
Before the Showa era, the area surrounding Asarigawa Onsen was a place where the Ainu people lived. From the Meiji era onward, Japanese settlement progressed, and the area became a hub for forestry and agriculture. Although the existence of the hot springs had been known since ancient times, full-scale development did not occur for many years, leaving the area as a quiet, nature-rich mountain region. It was only in the Showa 30s (the 1950s) that the infrastructure for a hot spring resort began to take shape.