With the reorganization of kokyu and the demise of kokyu junishi after the middle of the Heian period, Tonomo no tsukasa was incorporated into Tonomoryo (Imperial Palace Keeper's Bureau) and Tonomoryo began to send the staffs in Tonomo no tsukasa to Naishi no tsukasa (female palace attendants) and such a court lady was called court servant or court lady servant.
平安時代中期以後の後宮の再編と十二司の解体に伴い、主殿寮に吸収されて同署より内侍司に対して派遣される形となり、こうした女官を主殿司あるいは主殿女官と呼ばれた。