One of the best black hot springs in Kanto
Natural day trip hot spring, Yumori no Sato

The natural hot spring water that gushes out has a salt concentration that is almost the same as the body's salt concentration, so even if you stay in it for a long time, it will not put a strain on your body, making it suitable for hot spring therapy. Compared to regular hot springs, the power of ``humic acid'' suppresses deterioration, and it is a black hot spring rich in minerals.