Military officers of Sanmi (Third Rank) and above wore the same clothing as bunkan, therefore those who wore black bukan sokutai were automatically identified as military officials of Shii (Fourth Rank).
なお、三位以上の武官は文官と同じ装束であり、従って黒色の武官束帯を着用していると自動的に四位の武官であると判別できる。