Karasawa Spa is located on the western foot of Yatsugatake, halfway up Tengutake. This spring is known for its fatigue restoration with its carbonated spring! You can enjoy the transition of the seasons, spring, summer, autumn, and winter in the midst of nature. The emerald green glowing hot spring source and the Bog Notchwort moss that protrudes like a horseshoe are a must-see. In the garden, a magical green light can be seen from the rare glowing moss that sparks wonder and joy.