During the military campaigns, launched under and during the Ritsuryo system (a system of centralized government based on the ritsuryo code), to subjugate the Ezo (or Ebisu) barbarian peoples of northeastern Japan, the various eastern provinces were permitted to pay their taxes (of rice) in the form of supplying the expeditionary troops with provisions.
律令制下の蝦夷討伐においで東国諸国の正税を遠征軍の兵粮にあてる事を許した。