For a day by the water with a difference, make your way to the bubbling pools of Seibuchichibu Ekimae Onsen Matsurinoyu Hot Spring. This spot is renowned for its mineral-rich thermal waters.
This naturally heated water source is located in Chichibu. Once you've seen everything you can at Seibuchichibu Ekimae Onsen Matsurinoyu Hot Spring, head to nearby Hitsujiyama Park, Chichibu Shrine, and Chichibu Satsusho Meguri.