A 24-hour hot spring facility located inside Ariake Garden, boasting an impressive scale. The amber-colored natural hot spring, gushing from 1,500 meters underground, is known as a hot bath that offers excellent heat retention and moisturizing effects. The sauna room is a full-scale dry sauna equipped with auto-löyly, and the löyly sessions held every 10 minutes let you enjoy fresh heat and humidity at all times. The cold plunge bath is also set at a low temperature, tightening up your body after the sauna. There is also a spacious outdoor relaxation area, making this a place where you can unwind all day long and forget the bustle of the city.