Yes, tags would work, but I’m thinking more about how one might cut between two different sections given the non-horizontal nature of the braid’s fell lines. On a standard loom it is obvious where to cut so that each section becomes its own piece when done. Not so on a takadai braid.
Similarly, when finishing a braid, does one braid all the bundles into the middle (one less thread crossed with each bundle) to end with a flat edge for making jewelry? Or, as might be inferred from your answer further down, do you glue the end (or where you want to cut) and then cut a straight line?