Urasenke

Urasenke (裏千家^?, lit. "the rear Sen house/family") is the name of one of the main schools of Japanese tea ceremony. It is one of the san-Senke (three Sen houses/families); the other two are Omotesenke and Mushakōjisenke.
The san-Senke derive from Sen Rikyū, and it was not until after the era of his grandson, Sen Sōtan, that the three separate lines of the family came into being. Three sons of Sōtan each became heirs to the family name, Sen, and to the family profession of teaching the Way of Tea that their mutual family founder, Rikyū, had developed.