The rope on a pottery box is easy enough to untie, but the question is -- can you redo it? Can you? It's not a "geez, any old knot will do" kind of thing. As with many aspects of Japanese culture, there is a proper way to do things. I've already discussed the importance of the box containing your ceramic (i.e., don't throw it out). The below instructions will help you keep your box looking nice, with its rope all tied up neatly.  Spread the rope so the two loose ends are at the sides, and the loop is on the upper left corner. Make sure to adjust the length of the loose ropes to be even. Take the corner loop and place it over the top left of the box, so that the loop forms a 45-degree-angle over the box. Take the front rope and pull it over the loop. Put the front rope under the loop and pull it diagonally to the side. Take the side rope and put it over the loop and the front rope. Put the side rope under the loop and pull it diagonally to the side. Fold the side rope to make a small loop. Take the front rope and put it over the side rope loop and tie a bow. Tidy up the bow until you think it is just right. Voila, you did it!