In the samurai family style, the host must not wear anything on his left waist, because his left waist is to be saved for the swords, so he has the fukusa, or silk cloth, on his right waist, and has required movements on his right lap.
武家茶道の常として左腰は刀の位置であるため、帛紗は右につけ、右膝上での所作が多い。