Buko Onsen of Chichibu,Saitama
N.B. All of my onsen pics are watermarked all the way through. This is a picture of one of my very favorite hot springs in Saitama Prefecture in Chichibu. The alkalinity in this water is rated at 10 pH ! What does that mean, exactly...? pH (lower case "P" upper case "H" potential of Hydrogen) is the measure of alkalinity and acidity in water on a scale of 1 to 10. Drinking water is typically measured at around 7 pH. Lower numbers denote higher acidity levels whereas higher numbers denote a higher alkalinity level. The higher the pH the more beneficial it is for the skin. Natural skin emollient !