When zuryo-kokushi (the head of provincial governors) appeared in the mid-Heian period, suke were appointed to the zuryo of Shinno-ningoku and were treated equally with kokushu of other provinces.
平安中期になり、受領国司が登場した際も、親王任国については介が受領の地位に就き、他国の国守と同列に扱われた。