A total of 100 cho (about 9920 ares) of rice paddies established in the provices of Yamato, Settsu, Kawachi and Yamashiro were under the control of the Imperial Household Ministry, and shoshi (officials) of the Imperial Household Ministry such as tomo no miyatsuko (Servant of the Court administering a group) and shibe (low rank bureaucrats) were dispatched as 田司 (屯司 in theTiho Code) to manage the fields, which were cultivated by the peasants of alloted farmland as zoyo (irregular corvee).
大和国、摂津国、河内国、山背国に設置された、宮内省が管理する総計100町の水田で、宮内省所管諸司の伴部、使部等が田司（大宝令は屯司）として派遣されて経営にあたり、班田農民の雑徭によって耕作された。