The fact that the chokusho was delivered directly from the Imperial Court to the Mito Domain that was regarded as a vassal of the bakufu meant that the bakufu was ignored and lost its dignity, so the bakufu kept the contents of the document confidential, which led to trigger the Ansei no Taigoku (suppression of extremists by the bakufu) by Naosuke II, Tairo (chief minister).
幕府の臣下であるはずの水戸藩へ朝廷から直接勅書が渡されたということは幕府が蔑ろにされ威信を失墜させられたということであったため、幕府は勅条の内容を秘匿し、大老井伊直弼による安政の大獄を起こす引き金となった。