Around the witer solstice, we have a habit to take a bath with citron soaked in it. Citron is told to be effective for warming or for skin protection against dryness. This habit seems to have been kept since Edo era. We, japanese, like bathing. Citron is ripe in this season. With the knowledge of beneficial effect of this fruit for an adjunct to bathing, people might have kept this habit last so long among people in this season.
Our daughter, who is on the training for care for patients at home, has given a few citrons by the patien's family. She has brought them back home last night and has brought one of them into the bath when I took it. the fragrance of citron has spread all around. Needless to say that I have become more warmed than usual.