 It was in the generation of his children, Sōsa, Sōshitsu and Sōshu, that the three lines of the family—the Omotesenke, Urasenke and Mushakōjisenke—were established, with these three sons, respectively, as their heads of house.They are counted as the fourth generation in the respective lines.He had the original tea house constructed on the north side of the Sen residence and named it name "Konnichi-an" (今日庵 , "Hut of This Day").