Toshimaen Niwa no Yu
Spa

Toshimaen Niwa no Yu was designed by architect Kenzo Kosugi | © Toshimaen Niwa no Yu
Niwa no Yu includes separate male and female onsen and outdoor jacuzzis surrounded by Japanese gardens. The water is rich in sodium chloride, a salt rumored to ease muscle pain and joint stiffness. For the ultimate experience, there’s even a restaurant on the premises. It’s a very adult-friendly environment, and children under the age of 13 are denied entry.