It is considered that the policies to increase arable land, such as Sanze-isshin Law (a law allowing farmers who created new arable lands to own them for a period of three generations) and Konden einen shizai Law (a law allowing farmers who created new arable lands to own them permanently), were for supporting the strengthening the Ritsuryo system.
三世一身法・墾田永年私財法などの農地拡大政策もこうした律令制強化の一環だったと考えられている。