They are often described as "dressed in solid black", "wearing kusari-katabira (chain woven protective wear) inside and paint their face with black ink", "carrying a sword on the back" or "break into the enemy territory under cover of darkness", but a figure in black costume can be seen in the night, thus it is considered that their costume was dark blue or persimmon color.
「全身黒の衣装」「その中には鎖帷子を纏い、顔には墨を塗っている」「背中に刀」「夜陰に紛れて敵地に侵入する」という印象で描かれることが多いが、黒は夜に像が浮いて見えることから、紺色もしくは柿色の衣装を使用していたとされる。