There must be at least one "sekiwake" and "komusubi" on each side of the "banzuke", normally two total, but there may be more. Although there is usually a "yokozuna" there is no requirement for one, and it has sometimes happened that no active "yokozuna" or no "ōzeki" were listed in the ranks. If there is more than one "yokozuna" but only one "ōzeki", the lower rank will be filled out by designating one of the "yokozuna" as "yokozuna-ōzeki". There is no recorded instance of there being fewer than two "yokozuna" and "ōzeki" in total.