They obtained the authority to impose taxes on shoen based on new systems like hanzei (a system under which Shugo were allowed to collect half of the taxes from shoen) and shugouke (the contract system under which the owner of a shoen entrusted a Shugo to manage their shoen and pay customs).
それまでにない半済や守護請の権限を獲得し荘園への収税権をかけることができた。