Ansei Purge
The Ansei Purge (安政の大獄, Ansei no taigoku; "Mass Incarceration of Ansei") was a multi-year event during the Bakumatsu period of Japanese history, between 1858 and 1860, during which the Tokugawa shogunate imprisoned, executed, or exiled those who did not support its authority and foreign trade policies. The purge was undertaken by Ii Naosuke in opposition to Imperial Loyalists.