In ancient and medieval Japan, the government made post-less courtiers (Sani) with ranks lower than Rokui (Sixth Rank) serve for Saniryo (the office controling Sani, courtier without post) in order to help and give them chances for appointments or promotions.
古代・中世の日本において、六位以下の無官の者(散位)に対して救済及び任官、昇叙の機会を得させるために輪番で散位寮に出仕させた。