Most of such cases occurred when a person of Kurandonosuke (assistant official of kurodo) (who assumed the positions of Goi no kurodo and Kebiishi no suke concurrently) assumed the office of Benkan.
蔵人佐（五位蔵人で検非違使佐を兼ねる）が弁官に就任して、実現されることが多い。