Tennen Roten Onsen Spa Suminoe

A day-use hot spring destination complete with a mildly alkaline simple hot spring that flows at 480 liters per minute from 700 meters underground. The open-air baths are the highlights, including the Chikurin no Yu, a bamboo grove bathhouse, and the Mori no Tsuboyu, a rock bath surrounded by lush greenery using rocks from Totsukawa. Aim for a soak in the outdoor baths for the best sense of the changing seasons, switched each week between male and female patrons. Forget the woes of city life with this urban oasis of natural hot spring waters.

Come for a dip in different baths that ensure you never get bored. There's the Nekorobi no Yu, where water flows gently along your body, and the Super High-Concentration Carbonated Spring, rich in carbon dioxide, believed to promote blood circulation.

Try your hand and saun alike a local with Super Löyly Sauna, where water is poured over hot sauna stones to generate intense heat waves, and the Ako Salt Sauna, using mineral-rich salt from Ako. The facility also features relaxation services like body care and exfoliation, as well as a dining area with a wide menu ranging from set meals to snacks.