When a lord was absent or could not come to the Edo-jo Castle by reasons of sickness or others, baishin sometimes came to castle and transmitted a message to the cabinet officials of the Shogunate such as roju (senior councilor of the Tokugawa shogunate) and wakadoshiyori (a managerial position in the Edo bakufu).
主君が不在であったり病気等の理由で江戸城に登城できない場合、陪臣が登城し用件を老中・若年寄など幕閣に伝える場合もあった。