Cosmetics company Pola is applying its skin analysis technology, cultivated through years of cosmetics research, to scientifically verify the skin-beautifying effects of hot springs.

To demonstrate its skin-beautifying effects, the water used to fill the bathtub, which comes into contact with the user's skin, was collected.

To confirm the skin-beautifying effects you can experience with just one bath, we conduct evaluations based on skin science research.

Based on the results of skin science research conducted at Koishikawa Onsen (Spa LaQua),

Spa LaQua has been certified as a "relaxation booster hot spring."​