By mid-Edo period, while the world became peaceful and as society developed, new social issues emerged that could not be dealt with by the traditional shogunate system of law that succeeded the ancient system after the warring states period.
江戸時代も中期に差し掛かると、世の中は平和になる一方で社会が発展するにつれて新たな社会問題も生じ、古い戦国期以来の法体系を継承した従来の幕藩法体系では対応出来なくなってきた。