There is also a theory that it was a tactic 'to discharge people's accumulated complaints' plotted by bakufu (Japanese feudal government headed by a shogun) to avoid social disruption by the oppressed people suffering aftereffects of the bubble economy in the Edo period.
江戸のバブル期後の抑圧された世相の打ち壊しを避けるために幕府が仕掛けた「ガス抜き」であったという説もある。