By tradition of Omote-senke, its iemoto takes over the real name of KOSHIN that is 'Sosa,' whereas, koshi (the successor) of iemoto is referred to as 'Soin' and the retired iemoto is referred to as 'Sotan,' the real name of GENPAKU.
表千家の家元は四代である江岑の諱「宗左」を受け継ぎ、家元後嗣（若宗匠）は「宗員」、隠居してからは元伯の諱「宗旦」を名乗る伝統である。