Kagetsuna was favored by Imperial Prince Munetaka and given important posts such as Mikoshiban (a vassal responsible for opening and closing of lattices) and Junomari bugyo (a commissioner responsible for a kemari [Japanese ancient Imperial court game like kick-ball] ritual) in 1257 and 1263 respectively.
1257年には御格子番、1263年には御鞠奉行に任じられるなど、宗尊親王から重用された。