Upon entering the period of the Northern and Southern Courts, the Muromachi bakufu, which championed the Northern Court, issued Hanzeirei (order allowing military governors, or Shugo, to collect half of the taxes from manors and demesnes as military fund) on the pretense of keeping the army provisioned; the law recognized the authority of Shugo (provincial constable) to levy a half-tax (50% of all rice) annually on all private estates and public territories.
南北朝時代(日本)に入ると、北朝(日本)を擁した室町幕府は、兵粮確保を名目に半済令を出して荘園・公領の年貢半分の徴収権を守護に認めた。