While decorating an entire room in tatamis may be equivalent in cost to buying a carpet, the subsequent lower furnishing costs and utilitarian value of tatamis, make it more cost-saving.
製造、使用榻榻米已有四十年歷史的鄭倉海有個「偏方」：將濕潤的茶葉渣灑在榻榻米上，用小帚順著紋路掃，據說頗能達到清潔的效果。