Kaihatsu-ryoshus became zaichokanjin (the local officials in Heian and Kamakura periods) as yoriudo of kokushi and advanced to the local administration and were appointed to shokan (an officer governing shoen (manor)) such as geshi (a local official to manage a shoen estate), kumon (a local shoen official below the geshi in rank) and so on by honjo and tried to secure the rights on shoryo (territory).
開発領主たちは、国司の寄人として在庁官人となって、地方行政へ進出するとともに、本所から下司・公文などといった荘官に任じられ、所領に関する権利の確保に努めた。