Knowing that peasants gradually became impoverished due to Ku-Suiko, the ancient Japanese government of centralized governance decided in April 720 to reduce the annual interest rate of Ku-Suiko from 50% to 30%, and to forgive all debts born before 718, notifying various districts.
公出挙によって、百姓が疲弊し始めたことを知った律令政府は、720年（養老4）3月、公出挙の利子率の低減（年利50％→30％）、そして養老2年以前に生じた全ての債務の免除を決定し、諸国へ通知した。