Kasuga Onsen is located on the quiet foothills of Sanuki City. The sauna room has no BGM, TV, or even a clock, making it perfect for sauna enthusiasts who want to quietly face themselves. After a slow sweat in the far-infrared sauna at around 95°C, you can step into an approximately 18°C cold plunge bath. Alongside a large communal bath overlooking a Japanese garden, this is a local bathing facility that retains Showa-era charm.