You can enjoy two types of water at one place.
All in Kagoshima
Ichihino Onsen "Shimonoyu Koshu Yokujyo"
If you like hot water, this onsen is highly recommended. It's really hot.
Sendaitaki Onsen "Umeya Ryokan"
One of the Best 100 Onsens (selected by a Japanese NPO) in Japan. The water is very soft, and the staff member Mitsuko is very kind as well.
Shibi Onsen "Kami no yu"
An onsen of blessed water. The source is located under the shrine. This onsen would give you a fortune.
Udomaru Onsen
A surprising amount of mineral deposits are piling on the edge of the bathtub and the bathroom floor.
Hishikari Onsen "Kame no yu"
Clear & soft simple thermal water.
Kimiyoshi Onsen
Unusual sodium chloride and radioactive water. Once you soak into the bath, your body awakens.
Shirakigawachi Onsen "Sanso"
Glossy green-coloured water directly comes from between the rocks on the wall.