Kanpu masatsu (乾布摩擦, literally dry towel friction) is a Japanese custom where one rubs a dry towel along the body to create warmth and friction, particularly in cold weather, to promote good health or ward off disease. Although it physically resembles a vigorous sponge bath, kanpu masatsu is not a form of bathing as its goal is to warm the skin by friction and not to cleanse or wipe the body. Kanpu masatsu is often practiced in a group environment, particularly among children in schools where it is sometimes part of a morning exercise routine.
